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  Subjects -> ENGINEERING (Total: 2358 journals)
    - CHEMICAL ENGINEERING (201 journals)
    - CIVIL ENGINEERING (192 journals)
    - ELECTRICAL ENGINEERING (107 journals)
    - ENGINEERING (1240 journals)
    - ENGINEERING MECHANICS AND MATERIALS (394 journals)
    - HYDRAULIC ENGINEERING (56 journals)
    - INDUSTRIAL ENGINEERING (72 journals)
    - MECHANICAL ENGINEERING (96 journals)

CIVIL ENGINEERING (192 journals)                     

Showing 1 - 194 of 194 Journals sorted alphabetically
ACI Structural Journal     Full-text available via subscription   (Followers: 20)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 3)
Acta Structilia : Journal for the Physical and Development Sciences     Open Access   (Followers: 2)
Advances in Civil Engineering     Open Access   (Followers: 37)
Advances in Structural Engineering     Full-text available via subscription   (Followers: 31)
Agregat     Open Access   (Followers: 1)
Ambiente Construído     Open Access   (Followers: 1)
American Journal of Civil Engineering and Architecture     Open Access   (Followers: 33)
Architectural Engineering     Open Access   (Followers: 5)
Archives of Civil and Mechanical Engineering     Full-text available via subscription   (Followers: 2)
Archives of Civil Engineering     Open Access   (Followers: 12)
Archives of Hydro-Engineering and Environmental Mechanics     Open Access   (Followers: 2)
ATBU Journal of Environmental Technology     Open Access   (Followers: 4)
Australian Journal of Structural Engineering     Full-text available via subscription   (Followers: 6)
Baltic Journal of Road and Bridge Engineering     Full-text available via subscription   (Followers: 1)
BER : Building and Construction : Full Survey     Full-text available via subscription   (Followers: 9)
BER : Building Contractors' Survey     Full-text available via subscription   (Followers: 2)
BER : Building Sub-Contractors' Survey     Full-text available via subscription   (Followers: 2)
BER : Survey of Business Conditions in Building and Construction : An Executive Summary     Full-text available via subscription   (Followers: 3)
Bioinspired Materials     Open Access   (Followers: 5)
Bridge Structures : Assessment, Design and Construction     Hybrid Journal   (Followers: 14)
Building & Management     Open Access   (Followers: 1)
Building and Environment     Hybrid Journal   (Followers: 15)
Building Women     Full-text available via subscription  
Built Environment Project and Asset Management     Hybrid Journal   (Followers: 14)
Bulletin of Pridniprovsk State Academy of Civil Engineering and Architecture     Open Access   (Followers: 6)
Canadian Journal of Civil Engineering     Hybrid Journal   (Followers: 13)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 6)
Case Studies in Nondestructive Testing and Evaluation     Open Access   (Followers: 11)
Case Studies in Structural Engineering     Open Access   (Followers: 9)
Cement and Concrete Composites     Hybrid Journal   (Followers: 19)
Challenge Journal of Concrete Research Letters     Open Access   (Followers: 3)
Challenge Journal of Structural Mechanics     Open Access   (Followers: 6)
Change Over Time     Full-text available via subscription   (Followers: 2)
Civil and Environmental Engineering     Open Access   (Followers: 8)
Civil And Environmental Engineering Reports     Open Access   (Followers: 7)
Civil and Environmental Research     Open Access   (Followers: 17)
Civil Engineering = Siviele Ingenieurswese     Full-text available via subscription   (Followers: 4)
Civil Engineering and Architecture     Open Access   (Followers: 21)
Civil Engineering and Environmental Systems     Hybrid Journal   (Followers: 3)
Civil Engineering and Technology     Open Access   (Followers: 11)
Civil Engineering Dimension     Open Access   (Followers: 10)
Civil Engineering Infrastructures Journal     Open Access   (Followers: 1)
Cohesion and Structure     Full-text available via subscription   (Followers: 2)
Composite Structures     Hybrid Journal   (Followers: 272)
Computer-aided Civil and Infrastructure Engineering     Hybrid Journal   (Followers: 11)
Computers & Structures     Hybrid Journal   (Followers: 38)
Concrete Research Letters     Open Access   (Followers: 7)
Construction Economics and Building     Open Access   (Followers: 4)
Construction Engineering     Open Access   (Followers: 11)
Construction Management and Economics     Hybrid Journal   (Followers: 21)
Construction Science     Open Access   (Followers: 5)
Constructive Approximation     Hybrid Journal  
Curved and Layered Structures     Open Access   (Followers: 3)
DFI Journal : The Journal of the Deep Foundations Institute     Hybrid Journal   (Followers: 1)
Earthquake Engineering and Structural Dynamics     Hybrid Journal   (Followers: 17)
Enfoque UTE     Open Access   (Followers: 4)
Engineering Project Organization Journal     Hybrid Journal   (Followers: 7)
Engineering Structures     Hybrid Journal   (Followers: 13)
Engineering Structures and Technologies     Hybrid Journal   (Followers: 2)
Engineering, Construction and Architectural Management     Hybrid Journal   (Followers: 10)
Environmental Geotechnics     Hybrid Journal   (Followers: 5)
European Journal of Environmental and Civil Engineering     Hybrid Journal   (Followers: 9)
Fatigue & Fracture of Engineering Materials and Structures     Hybrid Journal   (Followers: 17)
Frattura ed Integrità Strutturale : Fracture and Structural Integrity     Open Access  
Frontiers in Built Environment     Open Access  
Frontiers of Structural and Civil Engineering     Hybrid Journal   (Followers: 6)
Geomaterials     Open Access   (Followers: 3)
Geosystem Engineering     Hybrid Journal   (Followers: 1)
Geotechnik     Hybrid Journal   (Followers: 3)
Géotechnique Letters     Hybrid Journal   (Followers: 7)
GISAP : Technical Sciences, Construction and Architecture     Open Access  
HBRC Journal     Open Access   (Followers: 2)
Hormigón y Acero     Full-text available via subscription  
HVAC&R Research     Hybrid Journal  
Indonesian Journal of Urban and Environmental Technology     Open Access  
Indoor and Built Environment     Hybrid Journal   (Followers: 2)
Infrastructure Asset Management     Hybrid Journal   (Followers: 2)
Infrastructures     Open Access  
Ingenio Magno     Open Access   (Followers: 1)
Insight - Non-Destructive Testing and Condition Monitoring     Full-text available via subscription   (Followers: 29)
International Journal for Service Learning in Engineering     Open Access  
International Journal of 3-D Information Modeling     Full-text available via subscription   (Followers: 3)
International Journal of Advanced Structural Engineering     Open Access   (Followers: 17)
International Journal of Civil, Mechanical and Energy Science     Open Access   (Followers: 1)
International Journal of Concrete Structures and Materials     Open Access   (Followers: 15)
International Journal of Condition Monitoring     Full-text available via subscription   (Followers: 2)
International Journal of Construction Engineering and Management     Open Access   (Followers: 10)
International Journal of Geo-Engineering     Open Access   (Followers: 3)
International Journal of Geosynthetics and Ground Engineering     Full-text available via subscription   (Followers: 4)
International Journal of Masonry Research and Innovation     Hybrid Journal   (Followers: 1)
International Journal of Pavement Research and Technology     Open Access   (Followers: 6)
International Journal of Protective Structures     Hybrid Journal   (Followers: 6)
International Journal of Steel Structures     Hybrid Journal   (Followers: 2)
International Journal of Structural Engineering     Hybrid Journal   (Followers: 8)
International Journal of Structural Integrity     Hybrid Journal   (Followers: 2)
International Journal of Structural Stability and Dynamics     Hybrid Journal   (Followers: 7)
International Journal of Sustainable Built Environment     Open Access   (Followers: 5)
International Journal of Sustainable Construction Engineering and Technology     Open Access   (Followers: 8)
International Journal on Pavement Engineering & Asphalt Technology     Open Access   (Followers: 7)
International Journal Sustainable Construction & Design     Open Access   (Followers: 1)
Journal of Bridge Engineering     Full-text available via subscription   (Followers: 14)
Journal of Building Engineering     Hybrid Journal   (Followers: 1)
Journal of Building Materials and Structures     Open Access   (Followers: 2)
Journal of Building Performance Simulation     Hybrid Journal   (Followers: 7)
Journal of Civil Engineering and Construction Technology     Open Access   (Followers: 14)
Journal of Civil Engineering and Management     Hybrid Journal   (Followers: 7)
Journal of Civil Engineering and Science     Open Access   (Followers: 9)
Journal of Civil Engineering Research     Open Access   (Followers: 7)
Journal of Civil Engineering, Science and Technology     Open Access   (Followers: 1)
Journal of Civil Society     Hybrid Journal   (Followers: 4)
Journal of Civil Structural Health Monitoring     Hybrid Journal   (Followers: 4)
Journal of Composites     Open Access   (Followers: 80)
Journal of Composites for Construction     Full-text available via subscription   (Followers: 13)
Journal of Computing in Civil Engineering     Full-text available via subscription   (Followers: 23)
Journal of Construction Engineering     Open Access   (Followers: 8)
Journal of Construction Engineering and Management     Full-text available via subscription   (Followers: 18)
Journal of Constructional Steel Research     Hybrid Journal   (Followers: 6)
Journal of Earth Sciences and Geotechnical Engineering     Open Access   (Followers: 4)
Journal of Fluids and Structures     Hybrid Journal   (Followers: 6)
Journal of Frontiers in Construction Engineering     Open Access   (Followers: 2)
Journal of Green Building     Full-text available via subscription   (Followers: 10)
Journal of Highway and Transportation Research and Development (English Edition)     Full-text available via subscription   (Followers: 14)
Journal of Infrastructure Systems     Full-text available via subscription   (Followers: 19)
Journal of Legal Affairs and Dispute Resolution in Engineering and Construction     Full-text available via subscription   (Followers: 5)
Journal of Marine Science and Engineering     Open Access   (Followers: 1)
Journal of Materials and Engineering Structures     Open Access   (Followers: 5)
Journal of Materials in Civil Engineering     Full-text available via subscription   (Followers: 7)
Journal of Nondestructive Evaluation     Hybrid Journal   (Followers: 9)
Journal of Performance of Constructed Facilities     Full-text available via subscription   (Followers: 3)
Journal of Pipeline Systems Engineering and Practice     Full-text available via subscription   (Followers: 6)
Journal of Rehabilitation in Civil Engineering     Open Access   (Followers: 3)
Journal of Solid Waste Technology and Management     Full-text available via subscription   (Followers: 1)
Journal of Structural Engineering     Full-text available via subscription   (Followers: 36)
Journal of Structural Fire Engineering     Full-text available via subscription   (Followers: 6)
Journal of Sustainable Architecture and Civil Engineering     Open Access   (Followers: 3)
Journal of Sustainable Design and Applied Research in Innovative Engineering of the Built Environment     Open Access   (Followers: 1)
Journal of the Civil Engineering Forum     Open Access  
Journal of the South African Institution of Civil Engineering     Open Access   (Followers: 2)
Journal of Water and Environmental Nanotechnology     Open Access  
Jurnal Spektran     Open Access   (Followers: 1)
Jurnal Teknik Sipil dan Perencanaan     Open Access   (Followers: 1)
Konstruksia     Open Access  
KSCE Journal of Civil Engineering     Hybrid Journal   (Followers: 2)
Latin American Journal of Solids and Structures     Open Access   (Followers: 4)
Materiales de Construcción     Open Access   (Followers: 1)
Mathematical Modelling in Civil Engineering     Open Access   (Followers: 4)
Nondestructive Testing And Evaluation     Hybrid Journal   (Followers: 15)
npj Materials Degradation     Open Access  
Obras y Proyectos     Open Access   (Followers: 1)
Open Journal of Civil Engineering     Open Access   (Followers: 9)
Photonics and Nanostructures - Fundamentals and Applications     Hybrid Journal   (Followers: 3)
Practice Periodical on Structural Design and Construction     Full-text available via subscription   (Followers: 3)
Proceedings of the Institution of Civil Engineers - Bridge Engineering     Hybrid Journal   (Followers: 8)
Proceedings of the Institution of Civil Engineers - Civil Engineering     Hybrid Journal   (Followers: 13)
Proceedings of the Institution of Civil Engineers - Management, Procurement and Law     Hybrid Journal   (Followers: 9)
Proceedings of the Institution of Civil Engineers - Municipal Engineer     Hybrid Journal   (Followers: 2)
Proceedings of the Institution of Civil Engineers - Structures and Buildings     Hybrid Journal   (Followers: 3)
Promet : Traffic &Transportation     Open Access  
Random Structures and Algorithms     Hybrid Journal   (Followers: 5)
Research in Nondestructive Evaluation     Hybrid Journal   (Followers: 6)
Revista IBRACON de Estruturas e Materiais     Open Access   (Followers: 1)
Road Materials and Pavement Design     Hybrid Journal   (Followers: 11)
Russian Journal of Nondestructive Testing     Hybrid Journal   (Followers: 5)
Science and Engineering of Composite Materials     Hybrid Journal   (Followers: 61)
Selected Scientific Papers - Journal of Civil Engineering     Open Access   (Followers: 3)
Slovak Journal of Civil Engineering     Open Access   (Followers: 2)
Soils and foundations     Full-text available via subscription   (Followers: 5)
Steel Construction - Design and Research     Hybrid Journal   (Followers: 4)
Structural and Multidisciplinary Optimization     Hybrid Journal   (Followers: 10)
Structural Concrete     Hybrid Journal   (Followers: 11)
Structural Control and Health Monitoring     Hybrid Journal   (Followers: 8)
Structural Engineering International     Full-text available via subscription   (Followers: 11)
Structural Mechanics of Engineering Constructions and Buildings     Open Access   (Followers: 1)
Structural Safety     Hybrid Journal   (Followers: 6)
Structural Survey     Hybrid Journal  
Structure     Full-text available via subscription   (Followers: 24)
Structure and Infrastructure Engineering: Maintenance, Management, Life-Cycle Design and Performance     Hybrid Journal   (Followers: 12)
Structures     Hybrid Journal   (Followers: 1)
Study of Civil Engineering and Architecture     Open Access   (Followers: 10)
Superlattices and Microstructures     Hybrid Journal   (Followers: 2)
Surface Innovations     Hybrid Journal  
Technical Report Civil and Architectural Engineering     Open Access   (Followers: 1)
Teknik     Open Access  
The IES Journal Part A: Civil & Structural Engineering     Hybrid Journal   (Followers: 6)
The Structural Design of Tall and Special Buildings     Hybrid Journal   (Followers: 5)
Thin Films and Nanostructures     Full-text available via subscription   (Followers: 2)
Thin-Walled Structures     Hybrid Journal   (Followers: 4)
Transactions of the VŠB - Technical University of Ostrava. Construction Series     Open Access   (Followers: 1)
Transportation Geotechnics     Full-text available via subscription   (Followers: 1)
Transportation Infrastructure Geotechnology     Hybrid Journal   (Followers: 8)
Underground Space     Open Access  
Water Science & Technology     Partially Free   (Followers: 25)
Water Science and Technology : Water Supply     Partially Free   (Followers: 22)

           

Journal Cover International Journal of Pavement Research and Technology
  [SJR: 0.585]   [H-I: 9]   [6 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Online) 1996-6814
   Published by Elsevier Homepage  [3175 journals]
  • In Honor of Professor James S. Lai

    • Authors: Linbing Wang
      First page: 113
      Abstract: Publication date: March 2018
      Source:International Journal of Pavement Research and Technology, Volume 11, Issue 2
      Author(s): Linbing Wang


      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2018.01.005
       
  • Experimental evaluation of geocell-reinforced bases under repeated loading

    • Authors: Sanat K. Pokharel; Jie Han; Dov Leshchinsky; Robert L. Parsons
      Pages: 114 - 127
      Abstract: Publication date: March 2018
      Source:International Journal of Pavement Research and Technology, Volume 11, Issue 2
      Author(s): Sanat K. Pokharel, Jie Han, Dov Leshchinsky, Robert L. Parsons
      Geocells, one type of geosynthetics manufactured in a form of three-dimensional interconnected cells, have been reported to effectively provide lateral confinement to infill material to increase the modulus and bearing capacity of base courses. Most studies so far have been focused on the behavior of geocell-reinforced bases under static loading. Geocells used for pavement applications are subjected to repeated loading. Limited studies have been conducted to investigate the performance of geocell-reinforced bases under repeated loading. In this study, single and multiple geocell-reinforced granular bases with three types of infill materials (Kansas River sand, quarry waste, and AB-3 aggregate) were tested and compared with the unreinforced bases under repeated loading. This study experimentally investigated the effect of the geocell reinforcement on the permanent deformation and percentage elastic deformation of the granular bases. The test results showed that the geocell reinforcement reduced the permanent deformation and increased the percentage elastic deformation of the granular bases. Multiple geocell-reinforced sections demonstrated even better performance as compared with single geocell-reinforced sections.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2017.03.007
       
  • The Strip Clustering Scheme for data collection in large-scale Wireless
           Sensing Network of the road

    • Authors: Zhoujing Ye; Xinlong Tong; Hailu Yang; Lingjian Meng; Wenjing Xue; Linbing Wang
      Pages: 138 - 145
      Abstract: Publication date: March 2018
      Source:International Journal of Pavement Research and Technology, Volume 11, Issue 2
      Author(s): Zhoujing Ye, Xinlong Tong, Hailu Yang, Lingjian Meng, Wenjing Xue, Linbing Wang
      For intelligent traffic and road structural health monitoring, Wireless Sensing Network has been applied widely in transportation, and large quantity of sensor nodes have been embedded in roadways. Now the service lives of sensors are limited mainly because of their battery power storage. So the life cycle of the whole network can be extended if the service life of each sensor in the network is prolonged. In this paper, the Strip Clustering Scheme (SCS) is proposed to replace the Conventional Scheme (CS). This method includes region division, cluster head node selection, link construction, data fusion and transmission. Adopting SCS can reduce a lot of redundant data and the total energy consumption of the network by data fusion. In addition, adopting SCS can also extend the monitoring area without increasing the communication range of the Access Point (AP), and facilitate further expansion of the network as a result. Based on the numerically simulated results, CS method can be used for the WSN within 75m, and SCS method is more suitable when the monitoring range is larger than 75m. To achieve the optimal network costs and the network life cycle by using SCS, the range of d (the longitudinal spacing of adjacent nodes), is suggested as 10–12.5m and the energy of cluster head nodes is 60% higher than the energy of non-head nodes with fixed w (the transverse distance of adjacent nodes). And the extra energy of head nodes can be obtained by adding the number of battery within the head nodes or using renewable energy technologies.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2017.06.005
       
  • A prototype IOT based wireless sensor network for traffic information
           monitoring

    • Authors: Yucheng Huang; Linbing Wang; Yue Hou; Wei Zhang; Yinning Zhang
      Pages: 146 - 152
      Abstract: Publication date: March 2018
      Source:International Journal of Pavement Research and Technology, Volume 11, Issue 2
      Author(s): Yucheng Huang, Linbing Wang, Yue Hou, Wei Zhang, Yinning Zhang
      An Internet of things (IOT) based wireless sensor system, solely using wireless accelerometers, is developed for traffic volume and vehicle classification monitoring in this paper. A series of laboratory tests, field tests as well as numerical simulation were performed to validate the feasibility and accuracy of the monitoring system. Besides, in order to eliminate the impacts of noises in the output signals, an advanced algorithm is developed to analyze the test data. The findings based on the test results indicate that the system is capable of reliably detecting axles and calculating axle spacing in both laboratory and field tests. In addition, compared with the actual measurements, the numerical simulation further validates the feasibility of the integrated wireless sensor system for traffic information monitoring.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2017.07.005
       
  • Design method for piezoelectric cantilever beam structure under low
           frequency condition

    • Authors: Qian Zhao; Yinan Liu; Linbing Wang; Hailu Yang; Dongwei Cao
      Pages: 153 - 159
      Abstract: Publication date: March 2018
      Source:International Journal of Pavement Research and Technology, Volume 11, Issue 2
      Author(s): Qian Zhao, Yinan Liu, Linbing Wang, Hailu Yang, Dongwei Cao
      In this study, to obtain the optimum design of piezoelectric cantilever beam under a low frequency condition, piezoelectric cantilever beams are designed based on finite element method with the validation of laboratory experiments. The finite element analysis software ANSYS is used to calculated the relationship between the dimension and the natural frequencies of the piezoelectric cantilever beam. Two piezoelectric cantilever beams are designed using both theoretical analysis and simulation results. Results show that the natural frequencies of the two kinds of piezoelectric cantilever beam are 9.77Hz and 10.02Hz, respectively. Laboratory experiments of the two piezoelectric cantilever beam show that the natural frequencies are 8.79Hz and 8.83Hz, respectively, with the peak voltage of 42.6V and 57.0V, and the average power of 1.04mW and 1.97mW. The good agreement on natural frequencies between numerical analysis and laboratory experiments demonstrates the feasibility of the proposed design method.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2017.08.001
       
  • A digital image analysis of gravel aggregate using CT scanning technique

    • Authors: Jiangfeng Wu; Linbing Wang; Yue Hou; Haocheng Xiong; Yang Lu; Lei Zhang
      Pages: 160 - 167
      Abstract: Publication date: March 2018
      Source:International Journal of Pavement Research and Technology, Volume 11, Issue 2
      Author(s): Jiangfeng Wu, Linbing Wang, Yue Hou, Haocheng Xiong, Yang Lu, Lei Zhang
      Particle shape was one of the most important factors which affects the gravel aggregate’s properties. It was also one of the important factors that directly affects the performance of asphalt pavements. In this paper, the gravel aggregate of quartzite was studied by using the industrial CT instrument. MATLAB was used to capture the aggregate slice properties including reverse color, median filtering, noise reduction, binarization and so on. The 3D aggregate model was reconstructed by using the software of MIMICS. The three-dimensional model of the aggregate was further optimized. The best fitting cuboid, cylinder, cone and sphere information of the aggregate were obtained by using the characteristics analysis function.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2017.08.002
       
  • Characteristics’ relation model of asphalt pavement performance
           based on factor analysis

    • Authors: Peng Tian; Ashish Shukla; Lei Nie; Gaofeng Zhan; Shuli Liu
      Pages: 1 - 12
      Abstract: Publication date: January 2018
      Source:International Journal of Pavement Research and Technology, Volume 11, Issue 1
      Author(s): Peng Tian, Ashish Shukla, Lei Nie, Gaofeng Zhan, Shuli Liu
      Pavement performance of asphalt is an important criterion for road engineering quality evaluation. Proposed research paper designed an orthogonal experiment using three asphalt mixtures, including SMA-13, AC-20 and ATB-25 to get their relation models and evaluate pavement performances. Totally twenty-seven samples from private companies have been selected and seven crucial parameters are analyzed via factor analysis. Further analysis concluded three main factors corresponding to the three main pavement performance parameters (i) high-temperature stability (ii) durability and (iii) shear resistance. Based on scores of each asphalt mixture’s 3D scatter-map is plotted. Analysis found the relationship between three above-mentioned parameters. Relationship between the three main performance parameters has been established using graphical analysis. A separation plane can define the different types of asphalt mixtures’ scatter distribution area, and get the regression equation for the plane. Based on the equation for the plane a more intuitionistic model has been made which describes the relationship of asphalt pavement performance.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2017.07.007
       
  • Enhancing the crumb rubber modified asphalt’s storage stability through
           the control of its internal network structure

    • Authors: Mohyeldin Ragab; Magdy Abdelrahman
      Pages: 13 - 27
      Abstract: Publication date: January 2018
      Source:International Journal of Pavement Research and Technology, Volume 11, Issue 1
      Author(s): Mohyeldin Ragab, Magdy Abdelrahman
      The current research investigated the effect of the internal network structure developed in the crumb rubber modified asphalt (CRMA) on its storage stability. The authors investigated the influence of asphalt-crumb rubber modifier (CRM) interaction parameters (interaction time, interaction speed, and interaction temperature) on the development of the internal network structure in CRMA. The authors found that the existence of three dimensional (3D) network structures in the CRMA enhanced its storage stability. Fourier Transform Infrared (FTIR) Spectroscopy was utilized to determine the nature of CRM components responsible for the development of 3D network structure in the liquid phase of CRMA. This was achieved by monitoring the changes of the IR distinctive peaks in the CRMA liquid phase. Dissolution tests and thermo gravimetric analysis (TGA) were carried out on the extracted CRM after interaction with asphalt to determine the role of CRM dissolved amounts and released components on the development of 3D network structure in CRMA. The asphalt-CRM interaction parameters were found to be essential to induce the formation of the 3D network structure within the liquid phase of the CRMA through controlling the swelling, dissolution and release of CRM components into the asphalt liquid phase. The existence of 3D network structure in the CRMA had determinant impact on the enhancement of its storage stability.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2017.08.003
       
  • Using a modified asphalt bond strength test to investigate the properties
           

    • Authors: Taha A. Ahmed; Hosin “David” Lee; R. Christopher Williams
      Pages: 28 - 37
      Abstract: Publication date: January 2018
      Source:International Journal of Pavement Research and Technology, Volume 11, Issue 1
      Author(s): Taha A. Ahmed, Hosin “David” Lee, R. Christopher Williams
      This paper presents a feasibility of a modified Asphalt Bond Strength (ABS) test method for use with a new adhesion testing device with three different pullout stubs and its application for evaluating Polyethylene (PE) wax-based Warm Mix Asphalt (WMA) additive. Four different asphalt binders were used to evaluate the feasibility of applying the existing AASHTO ABS test method using a new ASTM-certified adhesion testing device and three different pullout stubs. The modified ABS test method was used to evaluate the loss of adhesion and cohesion in asphalt bond strength due to moisture-induced damage. The paper also discusses rheological properties of extracted asphalt binders from three different test sections in Minnesota, Ohio and Iowa constructed using PE wax-based WMA additive and different amounts of Reclaimed Asphalt Pavement (RAP) materials. Based on the modified ABS test results using the new adhesion testing device, it was found that the proposed pullout stub with 0.0mm thickness (no edge) exhibited consistent results. Based on the results from extracted asphalt performance grading and the multiple stress creep recovery (MSCR) test, it was found that the PE wax-based WMA additive, which was specially designed for asphalt mixtures with a high RAP content, significantly improved the rheological properties of aged asphalt binders from RAP materials.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2017.08.004
       
  • Laboratory experiment on resilient modulus of BRA modified asphalt
           mixtures

    • Authors: Muhammad Karami; Hamid Nikraz; Surya Sebayang; Laksmi Irianti
      Pages: 38 - 46
      Abstract: Publication date: January 2018
      Source:International Journal of Pavement Research and Technology, Volume 11, Issue 1
      Author(s): Muhammad Karami, Hamid Nikraz, Surya Sebayang, Laksmi Irianti
      The objective of this research is to determine the potential effect on the resilient modulus of asphalt mixtures of using granular Buton Rock Asphalt (BRA) modified binder. The indirect tensile stiffness modulus (ITSM) tests were performed to examine the resilient modulus of unmodified and BRA modified asphalt mixtures for dense graded aggregates of 10mm (DG10) and 14mm (DG14) based on standard AS-2891.13.1-1995. In these tests, three percentage of BRA natural binder, including 10%, 20% and 30% by total weight of asphalt binder, were chosen asa substitute for the base asphalt binder in the BRA modified asphalt mixtures, with the purpose of improving the resilient modulus values. According to the test results, the resilient modulus of BRA modified asphalt mixtures was higher as compared to the unmodified asphalt mixtures. A higher percentage of BRA modifier binder content resulted in a higher resilient modulus. Furthermore, the unmodified and BRA modified containing only 20% BRA modified binder of DG10 were tested under different conditions of temperature, rise time, and pulse period. The results indicated that the BRA modified asphalt mixtures containing 20% BRA modified binder were less sensitive to the changes in the temperature, traffic volume and loading frequency. In addition, the substitution of 20% BRA modifier binder reduced the effect of the rest period ratio and loading time on the resilient modulus of the asphalt mixtures.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2017.08.005
       
  • State of the art: Asphalt for airport pavement surfacing

    • Authors: Greg White
      Pages: 77 - 98
      Abstract: Publication date: January 2018
      Source:International Journal of Pavement Research and Technology, Volume 11, Issue 1
      Author(s): Greg White
      Airport runways and taxiways are commonly comprised of a flexible pavement with an asphalt surface. Marshall-designed asphalt with sawn grooves is the most frequent airport asphalt surface material. However, some airports have adopted alternate asphalt mixtures for improved resistance to shear stress and for increased surface texture, allowing grooving to be avoided. Of the alternate asphalt mixtures, stone mastic asphalt is the most commonly reported. Resistance to shear stress is a critical performance requirement for airport surface asphalt. Shear stress resistance minimises the risk of rutting, shoving and groove closure. However, fracture resistance must not be ignored when developing even more shear resistance asphalt mixtures. Significant distress in airport asphalt surfaces, compliant with the traditional prescriptive specification, has increased interest in a performance-based airport asphalt specification. Commonly reported distresses include groove closure in slow moving aircraft areas and shearing in heavy aircraft braking zones. Development of reliable performance-indicative test methods is expected in the future and will enable warranted performance-based asphalt mixture design for airport surfaces.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2017.07.008
       
  • Gray Relational Entropy Analysis of High Temperature Performance of
           Bio-asphalt Binder, its Mixture

    • Authors: Junfeng Gao; Hainian Wang; Zhanping You; Xu Yang
      Abstract: Publication date: Available online 23 February 2018
      Source:International Journal of Pavement Research and Technology
      Author(s): Junfeng Gao, Hainian Wang, Zhanping You, Xu Yang
      Most of the existing researches only focus on some performances of the bio-asphalt binders instead of the asphalt mixtures, and the relationship between the performance of bio-asphalt binder and the performance of the mixture has been rarely reported. To analyze the gray relational entropy of high temperature performance of bio-asphalt binder and mixture, the bio-asphalt modified by 1% SBS with the concentrations of 0% (50#), 5%, 10%, 15%, and 20% by the weight of bio-asphalt binder, respectively, was used in this study. The performance indexes of bio-asphalt binder were tested through the conventional performance test and Superpave test of asphalt. The correlation between the performance indexes of the asphalt binder and the dynamic stability of the mixture was studied through the gray relational entropy method. The results showed that the high temperature performance of bio-asphalt had a certain degree of reduction before RTFO with the incorporation of bio-oil. The binder test parameters showed different changes in the law with the changes of bio-oil content. The dynamic stability of bio-asphalt mixtures decreased with an increase in bio-oil content. The RTFO aging had a great influence on the entropy correlation between the performance indexes of the bio-asphalt binders and the dynamic stability of the mixture. The non-recoverable creep compliance of bio-asphalt with low content (1%) of SBS modifier was weakly correlated with the dynamic stability of the mixture. The dynamic viscosity of bio-asphalt and the dynamic stability of the mixture exhibited the highest gray entropy correlation, which could be used as the key index of high-temperature performance evaluation of bio-asphalt.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2018.02.001
       
  • Using damage theory to analyze fatigue of asphalt mixtures on flexural
           tests

    • Authors: Luiz Guilherme Rodrigues de Mello; Márcio Muniz de Farias; Kamil Elias Kaloush
      Abstract: Publication date: Available online 19 February 2018
      Source:International Journal of Pavement Research and Technology
      Author(s): Luiz Guilherme Rodrigues de Mello, Márcio Muniz de Farias, Kamil Elias Kaloush
      Federal agencies and research centers around the world are studying and producing laboratory tests and procedures, as well predicting models, trying to obtain better insights related to fatigue in hot mix asphalt. The increasing interest in the development of fully mechanistic models for pavement design is changing the guidelines for newer studies. Even with climatic and traffic information as sources of empirical but necessary inputs, it is important to assess how damage increase and calculate damage properties of asphalt concrete towards the next generations of mechanistic design tools. This work presents an extensive analysis of fatigue test results using different asphalt concretes. The linear viscoelastic characterization of all mixtures was done by frequency sweep tests (E∗). An approximate interconversion process was also used to find additional viscoelastic properties. Fatigue data was treated using the continuum damage approach, and damage parameters were obtained. Furthermore, a relationship was evaluated among viscoelastic properties and damage parameters, which might be useful for fatigue characterization.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2018.02.003
       
  • Stress-dependent behavior of marine clay admixed with fly-ash-blended
           cement

    • Authors: Qiangqiang Cheng; Kai Yao; Yong Liu
      Abstract: Publication date: Available online 7 February 2018
      Source:International Journal of Pavement Research and Technology
      Author(s): Qiangqiang Cheng, Kai Yao, Yong Liu
      To investigate the stress-dependent behavior of fly-ash blended cement (FAC)-admixed marine clay, isotropic consolidated drained (CID) triaxial tests were performed in the confining pressure range of 50–350 kPa. Stress dilatancy was observed when the confining pressure was in the lowest range of 50–100 kPa. The peak strength increased linearly with increasing confining pressure; this linear relationship was described by the following equation: pp  = 1.7σ 3 + 581 kPa, wherein pp is the peak strength and σ 3 is the confining pressure. In the CID tests, failure modes of specimens were similar under different confining pressures. From the Mohr circles, it was found that the angle of shearing resistance was 52.8° and the cohesion intercept was 230.5 kPa. When the confining pressure was lower than the primary yield stress, some variation in the secant modulus were observed. However, the secant modulus tends to increase when the confining pressure exceeds the primary yield stress.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2018.01.004
       
  • Modeling Rutting Susceptibility Of Asphalt Pavement Using Principal
           Component Pseudo Inputs In Regression And Neural Networks

    • Authors: Parnian Ghasemi; Mohamad Aslani; Derrick K. Rollins; R. Christopher Williams; Vernon R. Schaefer
      Abstract: Publication date: Available online 31 January 2018
      Source:International Journal of Pavement Research and Technology
      Author(s): Parnian Ghasemi, Mohamad Aslani, Derrick K. Rollins, R. Christopher Williams, Vernon R. Schaefer
      Permanent deformation is a major load-associated distress occurring in flexible pavement systems and increases with load repetitions affecting road roughness, serviceability, and the international roughness index (IRI). Early detection of rutting is necessary for maintenance and rehabilitation activities, but due to the complex behavior of asphalt mixtures, accurately predicting the permanent deformation of asphalt pavement is difficult. Historically, multivariate regression modeling and recently, artificial neural networks (ANNs) are used widely for material properties prediction. The ability to model accurately the response variable is adversely affected when inputs have pairwise correlations. To overcome this barrier, principal component analysis (PCA), as a dimensionality reduction technique, can be used to produce uncorrelated linear combinations of the original inputs as illustrated in this work using 83 (i.e., samples) laboratory compacted specimens from the State of Wisconsin. Asphalt binder, aggregate, and mix properties are obtained and used as the model inputs. The response parameter is the accumulated strain at the corresponding flow number. Using the developed pseudo inputs from PCA, a multivariate regression and an ANN model are generated and were able to fit the test cases with r fit of 0.8 and 0.97 respectively. The developed machine learning-based framework is shown to be a capable tool in estimating the rutting behavior of asphalt mixture.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2018.01.003
       
  • Effect of corn and soybean oil derived additives on polymer-modified HMA
           and WMA master curve construction and dynamic modulus performance

    • Authors: Joseph H. Podolsky; R. Christopher Williams; Eric Cochran
      Abstract: Publication date: Available online 11 January 2018
      Source:International Journal of Pavement Research and Technology
      Author(s): Joseph H. Podolsky, R. Christopher Williams, Eric Cochran
      In previous work, Isosorbide Distillation Bottoms (IDB), and other isosorbide and soybean based materials with similar properties were shown to act as antistrips in a polymer modified warm mix asphalt (WMA) at a 0.75% dosage level both through visual observations and statistical analysis of Hamburg Wheel Tracking Device (HWTD) test results. Because of this evidence, there is an interest in how specimens produced with isosorbide and soybean bio-derived chemical additives would perform in the dynamic modulus test, as this is the main input used in AASHTOWare Pavement ME in the prediction of rutting performance. The main objective of this research is to compare and contrast dynamic modulus performance of two isosorbide, two soybean bio-derived chemical additive mixtures against each other and controls compacted at both hot mix asphalt (HMA) and WMA compaction temperatures. Master curve modeling with a proposed new (PN) model based on the Yang and You model and Booij and Thoone model for phase angle (δ) master curve construction led to the conclusion that proper placement of coefficients makes it possible to maintain precision and accuracy in the determination of E ∗ master curves while co-determining δ master curves. From the master curve results, it was observed that some of the corn and soybean bio-derived chemical additives may be affecting the viscous behavior at intermediate and high test temperatures. Results from statistical analysis were inconclusive, and thus it is felt that further work must be done comparing HMA and WMA produced specimens in the HWTD test.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2018.01.002
       
  • Fatigue endurance limit of epoxy asphalt concrete pavement on the deck of
           long-span steel bridge

    • Authors: Zhongwen Wang; Shunxian Zhang
      Abstract: Publication date: Available online 10 January 2018
      Source:International Journal of Pavement Research and Technology
      Author(s): Zhongwen Wang, Shunxian Zhang
      Fatigue crack damage in the epoxy asphalt concrete pavement of long-span steel bridge deck is still one of the most severe problems even though the fatigue endurance performance has been studied for a long time. In this study, it aimed at exploring the mechanism why the fatigue damage of the epoxy asphalt concrete occurred, as well as finding out the reason why fatigue test results in laboratory were different from those in practical engineering application. A finite element mechanics method was first applied to analyze the maximum strain value of the epoxy asphalt concrete pavement at different load positions, then fatigue performance of the epoxy asphalt concrete was investigated using a four-point bending fatigue testing method, and finally a three-parameter fatigue equation model, which was demonstrated to be feasible and rational, was utilized to determine fatigue endurance limit for the first time. The fatigue damage of the epoxy asphalt concrete occurred in a short time once the strain level with driving load was larger than fatigue endurance limit. In contrast, the fatigue damage did not appear in a long time if the strain level was less than the fatigue endurance limit. It is suggested that the fatigue endurance limit be adopted as a control parameter in the design phase of epoxy asphalt concrete pavement. These findings advance previous design specifications in the world, and could help extending service life of epoxy asphalt concrete pavement of long-span steel bridge deck.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2017.12.004
       
  • Influence of temperature on Jnr values of polymer modified asphalt binders

    • Authors: Khaleel Al-Adham; Hamad Al-Abdul Wahhab
      Abstract: Publication date: Available online 10 January 2018
      Source:International Journal of Pavement Research and Technology
      Author(s): Khaleel Al-Adham, Hamad Al-Abdul Wahhab
      At desert environment, asphalt binders that have performance grades of PG 70-16 or PG 76-16 may show early signs of rutting under heavy loads due to lack of strain recovery when used in the design of asphalt mixes and structures. Type and amount of polymer in addition to testing temperature are the major factors that affect the recovery properties of asphalt binders. This study was conducted to evaluate J nr parameters of four different polymers (Styrene–Butadiene–Styrene “SBS”, Crumb Rubber “CR”, light density Polyethylene “PE” and modified Olefin “OF”) used to modify asphalt binders. Asphalt samples were tested at various temperatures and regression models were created. These models are useful to properly select the polymer type and amount suitable to the area of concern and to be used in the design of pavement structures especially in Mechanical–Empirical Design Guide. It is found from this study that power-law models best described the relationship between J nr and temperature with signs of shear thickening. The results of Styrene–Butadiene–Styrene Modified asphalt binders have shown best behavior of recovering the strain at high temperatures with Non-recoverable creep compliance (J nr) values less than 0.5 obtained at 76 °C. Polyethylene and Olefin polymers could improve local asphalt binders at areas where PG 58 and PG 64 are required. The J nr-temp curves can be considered as master curves for local conditions and material.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2018.01.001
       
  • Toward Utilization of ground tire rubber and reclaimed pavement materials
           with asphalt Binder: Performance evaluation using essential work of
           fracture

    • Authors: Dharamveer Singh; Shashibhushan Girimath
      Abstract: Publication date: Available online 4 January 2018
      Source:International Journal of Pavement Research and Technology
      Author(s): Dharamveer Singh, Shashibhushan Girimath
      Utilization of ground tire rubber (GTR) binder in combination with reclaimed asphalt pavements (RAP) binder can provide added benefits in terms of material, cost and environmental saving, and hence a promising step toward sustainable construction of pavements. The present study utilized essential work of fracture (EWF) principal to evaluate performance of a GTR binder blended with two different types of RAPs: RAP-A and RAP-S, having different rheological properties. The GTR binder was mixed with different percentages (0%, 15%, 25% and 40% by weight of virgin binder) of RAP-A and RAP-S. First, Superpave performance grade (PG) of different combinations of asphalt binders was determined in the laboratory. Thereafter, the EWF of binders was determined using a newly developed double edge notch tension (DENT) test. Further, the data obtained from the DENT test were used to estimate critical crack tip opening displacement (CTOD). The results showed that addition of RAP decreased fracture resistance of GTR binder. Addition of RAP-A resulted in a faster decrease in performance of GTR binder compared to RAP-S. It can be concluded that low percentage of RAP may be utilized with GTR binder. Further, analyses indicated that RAP sources and its quantity could have significant impact on performance of asphalt mixes.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2017.12.008
       
  • Modification and application of axle load conversion formula to determine
           traffic volume in pavement design

    • Authors: Haitao Zhang; Mingyang Gong; Tengjiang Yu
      Abstract: Publication date: Available online 29 December 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Haitao Zhang, Mingyang Gong, Tengjiang Yu
      The determination of traffic volume in asphalt pavement design has not considered the effects of seasonal variability on vehicle axle loads in China. By analyzing the effects of seasonal variation on the axle loads, formulas for the conversion of modified axle load to traffic volume have been derived and presented, in accordance with specifications in China. This study includes the following: derivation of formulas for converting modified axle loads to traffic volume, classification of 3 different seasons, determination of seasonal distribution and influencing coefficients, and application of modified axle load conversion formulas, among others. By comparison of results between modified and unmodified formulas applied in a sample asphalt pavement design in Harbin, China, the study demonstrates that the modified axle load conversion formulas are scientific and rational. The results of asphalt pavement design obtained using the modified axle load conversion formulas increase the thickness and whole strength of the asphalt pavement structure; in addition, it can more efficiently satisfy the requirements of an actual vehicle running on the pavement.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2017.12.007
       
  • Pavement condition assessment using soft computing techniques

    • Authors: Ajit Pratap Singh; Antriksh Sharma; Raunak Mishra; Makrand Wagle; A.K. Sarkar
      Abstract: Publication date: Available online 27 December 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Ajit Pratap Singh, Antriksh Sharma, Raunak Mishra, Makrand Wagle, A.K. Sarkar
      Roads are the lifeline of a nation which provides a reliable and easy access to different areas across the country. Once the roads are constructed, their condition goes on deteriorating with time. Therefore, implementing periodic pavement maintenance is equally important as that of construction for the satisfactory performance throughout their design life. This study develops an approach for pavement condition assessment and their prioritization which can be dealt with a variety of performance indicators for evaluating different aspects of pavement performance. Pavement stretches with low ratings will have a high probability to be scheduled for maintenance and rehabilitation, depending on the availability of funds and the importance of roads. This paper presents two approaches of fuzzy mathematical analysis to conceive strategic planning for maintenance and rehabilitation of pavements. The pavement deterioration condition has been marked by four performance indicators: (a) International Roughness Index (IRI) (b) Surface Modulus (E o) (c) Rut depth (R) and (d) Friction Coefficient (f). A methodology has been framed to assess condition of Pradhan Mantri Gramin Sadak Yojna (PMGSY) all weather roads located in Jhunjhunu district of Rajasthan, India. These stretches have been prioritized on the basis of their performance parameters using two soft computing techniques: (a) Fuzzy Analytical Hierarchy Process (FAHP) and (b) Fuzzy Weighted Average (FWA) method. The results clearly demonstrate that FAHP being more scientific approach can be considered as a base model for assessing the pavement condition, however to have sound decisions, results so obtained are compared effectively from FWA method.

      PubDate: 2018-02-26T19:49:07Z
      DOI: 10.1016/j.ijprt.2017.12.006
       
  • Prediction on rutting decay curves for asphalt pavement based on the
           pavement-ME and matter element analysis

    • Authors: Chen Zhang; Hainian Wang; Zhanping You; Yu Liu; Xu Yang; Jinkun Xiao
      Pages: 466 - 475
      Abstract: Publication date: November 2017
      Source:International Journal of Pavement Research and Technology, Volume 10, Issue 6
      Author(s): Chen Zhang, Hainian Wang, Zhanping You, Yu Liu, Xu Yang, Jinkun Xiao
      In China, the research on asphalt pavement deterioration was hindered by a lack of comprehensive investigations on field data collection of pavement performance within its service life. The problem of traditional methods that yield inadequate data can be addressed using a combination of the Pavement Mechanistic-Empirical (PME) system and matter-element analysis (MEA). Measured data for the rutting of a road section in the Shaanxi province was employed as the validation data in this study. The input parameter for PME was localized, and a decay model based on the predicted results of PME was established by the MEA method. The results from PME indicate that the predicted results of rutting show a “lagging” characteristic when compared with the measured data. Some optimization measures are employed to process the predicted results of PME so as to better fit the measured data. The predicted data for rutting resistance can be considered essential data for the MEA method to investigate the decay tendency of the rutting of asphalt pavement in its design life. A case study indicates that the rutting resistance of asphalt pavement will deteriorate from excellent to good, good to medium, medium to inferior, and inferior to bad in 13.8months, 32.5months, 43.8months, and 55.2months, respectively. The combination of PME and MEA proves to be appropriate to evaluate rutting potential in project level pavements. Follow-up research can be carried out on the developing trend of pavement damage, so as to better determine the maintenance time for a chosen road section.

      PubDate: 2017-11-03T21:28:10Z
      DOI: 10.1016/j.ijprt.2017.06.002
       
  • Key steps of carbon emission and low-carbon measures in the construction
           of bituminous pavement

    • Authors: Bo Peng; Xueyong Fan; Xunjie Wang; Wenying Li
      Pages: 476 - 487
      Abstract: Publication date: November 2017
      Source:International Journal of Pavement Research and Technology, Volume 10, Issue 6
      Author(s): Bo Peng, Xueyong Fan, Xunjie Wang, Wenying Li
      At present, energy saving and emission reduction have become the main points of social and economic development. According to the field survey of the carbon emission in the highway construction of several provinces in China, this study determines the carbon source and divides the fieldwork construction of bituminous pavement in eight stages. Then the calculation model of carbon emission in the construction of bituminous pavement is established using the energy value, carbon emission factor, and global warming potential as the calculation parameters. Based on energy consumption and carbon emissions survey, weighting coefficients of various aspects are calculated by the method of analytic hierarchy, and the key stages of construction are determined. The result showed that the weighting coefficients of aggregate drying, bitumen heating and bituminous mixture heating, which are defined as the key stages, are 0.4130, 0.2335 and 0.1522, respectively. By analyzing the influencing factors of carbon emission in the process of bitumen heating and aggregate drying, the type of energy used in construction is an important factor affecting the carbon emission of construction. This paper determines the energy conservation and emission reduction combining scheme, carbon emissions can be reduced by more than 30% by implementing the plan to change the aggregate and bituminous heating energy. The research results will provide a reference direction and a theoretical basis for the research of energy-saving and emission reduction technology for bituminous pavement construction.

      PubDate: 2017-11-03T21:28:10Z
      DOI: 10.1016/j.ijprt.2017.03.002
       
  • Effect of Superpave restricted zone on volumetric and compaction
           properties of asphalt mixtures

    • Authors: Ghazi G. Al-Khateeb; Khalid A. Ghuzlan; Mohammad O. Al-Barqawi
      Pages: 488 - 496
      Abstract: Publication date: November 2017
      Source:International Journal of Pavement Research and Technology, Volume 10, Issue 6
      Author(s): Ghazi G. Al-Khateeb, Khalid A. Ghuzlan, Mohammad O. Al-Barqawi
      The Superpave aggregate criteria originally include a restricted zone that lies along the maximum density line and through which gradations are not recommended to pass. The debate with regard to whether or not such a restriction needs to be imposed has been ongoing and inconclusive. In this study, fifteen different gradations of limestone aggregate having three nominal maximum aggregate sizes (NMAS) of 19.0, 12.5, and 9.5mm and covering five types: above, below, crossover through, hump through, and through restricted zone (ARZ, BRZ, CRZ, HRZ, and TRZ) were used to investigate the effect of restricted zone on mixture properties. The Superpave gyratory compactor (SGC) was used to produce the asphalt mixture samples according to the Superpave system. Findings of the study showed that the CRZ, HRZ, and TRZ mixtures generally could meet the Superpave voids in mineral aggregate (VMA) criteria easier than the BRZ and ARZ mixtures. Contrary to the expected trend, the VMA values for the BRZ mixtures were found to be higher than those of the ARZ mixtures for the 19.0-mm NMAS. The HRZ mixtures similar to the ARZ and BRZ mixtures had high effective asphalt binder content. ARZ mixtures generally could violate the Superpave criteria for compaction properties (% of maximum specific gravity at the initial number of gyrations, %G mm at N initial, and% of maximum specific gravity at the maximum number of gyrations, %G mm at N maximum). The TRZ mixtures in general provided the highest dust proportion (DP) values, whereas, the BRZ mixtures provided the lowest DP values.

      PubDate: 2017-11-03T21:28:10Z
      DOI: 10.1016/j.ijprt.2017.03.004
       
  • Asphalt Foaming Quality Control Model Using Neural Network and Parameters
           Optimization

    • Authors: An-Lin Wang; Zhen-Sheng Fu; Fu-Min Liu
      Abstract: Publication date: Available online 26 December 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): An-Lin Wang, Zhen-Sheng Fu, Fu-Min Liu
      Industrial asphalt foaming is a process of mixing, transferring heat and phase transition of multi-phase multi-component flow in the expansion chamber, including a series of complex problems such as difficult analysis and observation. In the context of this research, asphalt foaming quality control model using neural network was constructed to map the pertinent parameters (asphalt temperature, water content and air pressure) into the foaming properties (maximum expansion ratio and half-life time). In addition, Particle swarm optimization was adopted to avoid the local infinitesimal defect and slow constringency in the traditional BP algorithm. The prediction error of Shell 60/70 quality control model indicates that the asphalt foaming quality control model using PSO-BP neural network is effective , and this provides a novel idea for studying of the foam asphalt, which has practical significance for the design of asphalt foam equipment. Finally, a parameters optimization model with the maximization of the foaming index was proposed based on the quality control model to improve the foaming performance of the asphalt foaming equipment. With the analysis of a parameters optimization model of Shell 60/70 asphalt, the better foaming properties are the maximum expansion ratio of 12.28 times and half-life time of 11.02secs at the foaming condition of asphalt temperature of about 168 ° C, the water content of about 1.5wt% and the air pressure of about 1 bar. The method proposed in this paper is of important reference significance for the engineering with difficult analysis and observation.

      PubDate: 2017-12-27T02:49:35Z
      DOI: 10.1016/j.ijprt.2017.12.005
       
  • Characterization of Environmental Loads Related Concrete Pavement
           Deflection Behavior Using Light Detection and Ranging Technology

    • Authors: Shuo Yang; Halil Ceylan; Kasthurirangan Gopalakrishnan; Sunghwan Kim; Peter C. Taylor; Ahmad Alhasan
      Abstract: Publication date: Available online 16 December 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Shuo Yang, Halil Ceylan, Kasthurirangan Gopalakrishnan, Sunghwan Kim, Peter C. Taylor, Ahmad Alhasan
      Repeated deflection behavior resulting from temperature and moisture variations across concrete pavement depth causes curling and warping of Portland cement concrete (PCC) pavement systems. Although curling and warping issues have been investigated extensively, there are no standardized methods or procedures currently available to characterize the degree/magnitude of this in-situ environmental load-related deflection. This study discusses the development of a detailed procedure for assessing environmental load-related deflection of concrete pavement using a Light Detection and Ranging (LiDAR) system. LiDAR systems have been recognized as an advanced technology for transportation infrastructure inspection but have not been widely investigated for measuring environmental load-related deflection of concrete pavements. In this study, field surveys were conducted on six identified concrete pavement sites in Iowa by scanning the concrete slab surfaces using the stationary LiDAR instrument. Based on dense point cloud data obtained by the LiDAR instrument, a data processing algorithm was developed to obtain the degrees of environmental load-related deflection. The degrees of deflection obtained were correlated to variations in pavement performance, mix design, pavement design, and construction details at each site. The results and findings from this study describe a potentially novel method of using LiDAR system for environmental load-related deflection characterization of concrete pavement.

      PubDate: 2017-12-27T02:49:35Z
      DOI: 10.1016/j.ijprt.2017.12.003
       
  • Non-destructive evaluation of a city roadway for pavement rehabilitation:
           A case study

    • Authors: Chien-Chiao Chao; Deng-Fong Lin; Huan-Lin Luo; Yu-Kai Wang; Wei Lo
      Abstract: Publication date: Available online 12 December 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Chien-Chiao Chao, Deng-Fong Lin, Huan-Lin Luo, Yu-Kai Wang, Wei Lo
      In this study, a pavement evaluation was carried out on a corridor that carried heavy truck traffic, connecting a harbor, a major highway, an airport, and industries. The pavement of the corridor was distressed frequently, requiring constant maintenance. With tight maintenance budget and intention to minimize the effects on traffic, full reconstruction or major rehabilitation of the corridor was not practical. To develop proper pavement rehabilitation design within the practical constrains, pavement evaluation was performed in this study using non-destructive techniques, such as visual condition survey, falling weight deflectometer (FWD), ground penetrating radar (GPR), and dynamic cone penetrometer (DCP), and pavement coring. It is demonstrated that appropriate pavement rehabilitation design can be developed to offer practical solution to the repair/maintenance for city streets.

      PubDate: 2017-12-27T02:49:35Z
      DOI: 10.1016/j.ijprt.2017.12.002
       
  • Measuring the effects of styrene butadiene copolymer latex-Portland cement
           additives on properties of stabilized soil-aggregate base

    • Authors: Mojtaba Shojaei Baghini; Amiruddin Ismail; Mehdi Pour Asghar; Gholamreza Fendereski; Mohammad Sadeghi
      Abstract: Publication date: Available online 12 December 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Mojtaba Shojaei Baghini, Amiruddin Ismail, Mehdi Pour Asghar, Gholamreza Fendereski, Mohammad Sadeghi
      The fundamental objective of this research is to study the behavior and properties of the traditional and non-traditional additives and to characterize the cementitious stabilized base layer. This research presents experimental results on the improvement of short-term road base performance by the addition of carboxylated styrene butadiene emulsion (Tylac® 4190); Portland cement and Tylac® 4190-Portland cement mixture. To evaluate the short-term performance, the specimens were molded, cured for 7, 28, and 60 days, and subjected to different stress sequences to study the unconfined compressive strength (UCS), indirect tensile strength (ITS), indirect tensile resilient modulus (ITRM), flexural strength (FS) and un-soaked California bearing ratio (U-CBR). The results indicate that the additives improved the strength and the stiffness of the specimens, which has been found to be an important quality indicator of mechanical properties of road base. The flexural strength tests showed that the addition of a 4% Portland cement–8% Tylac® 4190 mixture resulted in improvement of 81.5% of modulus of rupture as compared to the sample with 4% cement. Therefore, this research nominates a new polymer additive having outstanding engineering properties.

      PubDate: 2017-12-27T02:49:35Z
      DOI: 10.1016/j.ijprt.2017.12.001
       
  • Investigation of pavement raveling performance using smartphone

    • Authors: Aidin Massahi; Hesham Ali; Farshad Koohifar; Mohamadtaqi Baqersad; Mojtaba Mohammadafzali
      Abstract: Publication date: Available online 7 December 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Aidin Massahi, Hesham Ali, Farshad Koohifar, Mohamadtaqi Baqersad, Mojtaba Mohammadafzali
      Raveling is one of the critical modes of failure in open graded asphalt mixtures. The Florida Department of Transportation (FDOT) Districts 4 and 6, located in southeastern Florida, have experienced a large amount of premature raveling with Open Graded Friction Course mixes (OGFC) compared to the other districts in Florida. To investigate the reason of raveling occurrence, the research team devised a data collection tool for smartphones and developed software to measure the raveling area and its location and severity in video images using smartphone GPS capability. The data used in this study were extracted from different FDOT database systems, such as the Laboratory Information Management System (LIMS) and the Electronic Data Management System (EDMS), as well as from the National Oceanic and Atmospheric Administration (NOAA). Ten projects were surveyed by the research team, and numerical raveling statistics were developed and compared with qualitative raveling ratings provided by FDOT. Good correlation was found between the two methods. The comparison was used to establish thresholds of good performance. Such thresholds can be used to develop performance specifications or warranty benchmarks. The relative effects of mix design, construction, and environmental factors were also studied. A project level of analysis was conducted. Several hypotheses were evaluated to determine the cause of premature raveling. Data analysis results indicate significant correlations between raveling and ambient temperature, mix temperature, mix spread rate, and gradation. In light of this study, recommendations were made to enhance the longevity of the OGFC mixtures.

      PubDate: 2017-12-27T02:49:35Z
      DOI: 10.1016/j.ijprt.2017.11.007
       
  • Data collection experience for preliminary calibration of the AASHTO
           pavement design guide for flexible pavements in South Carolina

    • Authors: Md Mostaqur Rahman; Sarah L. Gassman
      Abstract: Publication date: Available online 7 December 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Md Mostaqur Rahman, Sarah L. Gassman
      The primary objective of this research was to identify existing historical data (i.e., climate, traffic, pavement design information, material properties, and pavement performance) within the South Carolina Department of Transportation for use in the local calibration of the Mechanistic Empirical Pavement Design Guide (MEPDG) for South Carolina. Based on all of the compiled information, 14 in-service asphalt concrete (AC) pavement sections were selected as suitable for this study, and information gaps were identified. Field and laboratory tests were performed to study the subgrade modulus at 3 sites. The data collected for the 14 sections were used to perform a preliminary analysis of the MEPDG AC rutting models and AC fatigue cracking models. Level 1 (project specific), Level 2 (region specific), or Level 3 (default) inputs were used, depending on data availability. This study was the first step in obtaining local calibration factors for South Carolina and provided guidance to perform the final local calibration. Currently, many highway agencies are looking to implement MEPDG for designing their pavements. Thus, this paper serves as a guide to other highway agencies in their preliminary phase of a MEPDG local calibration study.

      PubDate: 2017-12-27T02:49:35Z
      DOI: 10.1016/j.ijprt.2017.11.009
       
  • Effect of binder grade on performance parameters of asphaltic concrete
           paving mixtures

    • Authors: Muhammad Junaid; Muhammad Irfan; Sarfraz Ahmed; Yasir Ali
      Abstract: Publication date: Available online 5 December 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Muhammad Junaid, Muhammad Irfan, Sarfraz Ahmed, Yasir Ali
      This study explores effect of binder grade variation on the performance parameters of stiffness, fatigue, and permanent deformation using different asphaltic concrete paving mixtures. Two penetration grade binders (40/50 and 80/100), four gradations (two wearing and two base courses) and single limestone aggregate source were used. Superpave Gyratory Compactor (SGC) was employed to fabricate specimens for Dynamic Modulus E ∗ test, Repeated Load Deformation Test (Flow Number Test, FN) and Static Creep Test (Flow Time test, FT) using Asphalt Mixture Performance Tester (AMPT). The E ∗ test was carried out for a range of temperatures (4.4–54.4 °C) and a frequency sweep (25–0.1 Hz), while FN and FT tests were performed at a single effective temperature of 54.4 °C and 300 kPa stress level. The E ∗ test results were subjected to the non-linear optimization technique to develop the stress-dependent master curves which reveal that the grade of bitumen significantly influences the stiffness of mixtures. The combination of the E ∗ and the phase angle pronounced into fatigue parameter which describes the fatigue behavior of a mix, and results indicate that the softer grade translates into higher fatigue resistance and vice versa. We observe that the 40/50 binder, ​on average, is 1.8 times more rut-resistant than the 80/100 binder. Further, this study also develops a non-linear regression model to express E ∗ as a function of testing temperature, loading frequency, and mixture volumetric parameter.

      PubDate: 2017-12-27T02:49:35Z
      DOI: 10.1016/j.ijprt.2017.11.006
       
  • A laboratory and field study on 100% Recycled Cement Bound Mixture for
           base layers

    • Authors: Piergiorgio Tataranni; Cesare Sangiorgi; Andrea Simone; Valeria Vignali; Claudio Lantieri; Giulio Dondi
      Abstract: Publication date: Available online 23 November 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Piergiorgio Tataranni, Cesare Sangiorgi, Andrea Simone, Valeria Vignali, Claudio Lantieri, Giulio Dondi
      The infrastructure system has experienced an unprecedented development in the last fifty years. Most of the road pavements have been used for over twenty years and today require increasing maintenance to keep acceptable their levels of performance. In addition, the use of virgin and raw materials has been strongly restricted by raising price and eco-friendly policies. As a result, researchers and companies have focused their attention on recycling techniques with waste and second-hand materials that could lead to the construction and restoration of civil infrastructures without negatively affecting their mechanical properties. The study presented in this paper pursues this trend of research, by the evaluation of the performance of two different 100% Recycled Cement Bound Mixture (RCBM) for base layers. Data were always compared to those obtained for a traditional Cement Bound Mixtures (CBM) entirely made of virgin aggregates. The experimental programme was divided into two different and consecutive phases: a laboratory study and a trial field phase. In the first, the aim was the mix design and the physical and mechanical characterization of three mixtures. In the second phase, a full-scale trial field was realized: in situ tests and sampling were planned in four dates, corresponding to 0, 60, 180 and 365 days of trafficking. Based on results, the replacement of virgin aggregates with waste materials in CBMs, according to these specific mix designs seems to be a practicable solution for the construction of base layers with suitable performance.

      PubDate: 2017-12-27T02:49:35Z
      DOI: 10.1016/j.ijprt.2017.11.005
       
  • Improving Quality Control through Chance Constrained Programing: A Case
           Study using Bailey Method

    • Authors: Aravind Krishna Swamy; Karanjeet Kaur Sandhu; Jennifer Foxlow
      Abstract: Publication date: Available online 22 November 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Aravind Krishna Swamy, Karanjeet Kaur Sandhu, Jennifer Foxlow
      Worldwide it is accepted practice that guidelines regarding aggregate gradation to be adopted for any asphalt concrete mixture are recommended by transportation agencies. In general, these specifications are based on past experience and knowledge about local conditions. Alternatively, Bailey method of mixture design considers actual aggregate properties (like shape, density, packing characteristics) while deciding aggregate gradation. Such a mechanistic approach guarantees better mixture performance. As single source of aggregate cannot meet requirements at all sieve sizes, aggregates from different sources have to be combined to achieve target gradation. Currently used deterministic optimization approaches for aggregate blending use mean values. This leads to a situation where resultant gradation is beyond specification limits occasionally. Alternatively, stochastic optimization approaches consider inherent gradation variability while arriving at final blending proportions. The present work describes a novel chance constrained programing approach that minimizes overall cost of mixture while considering quality control issues. The proposed chance constrained programing approach offers flexibility of introducing various gradation limits as well as Bailey ratio constraints simultaneously. The proposed methodology is validated using Monte Carlo simulation approach. The simulation results indicated that mixtures blended using chance constrained approach produces less number of failures when compared to deterministic approach. This is due to fact that inherent material variability is considered during blend optimization. The proposed work offers advantages of producing asphalt concrete mixtures at lower cost while having better quality control.

      PubDate: 2017-11-23T05:29:06Z
      DOI: 10.1016/j.ijprt.2017.11.004
       
  • Synergistic Performance of Piezoelectric Transducers and Asphalt Pavement

    • Authors: Hongduo Zhao; Luyao QIN; Jianming Ling
      Abstract: Publication date: Available online 15 November 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Hongduo Zhao, Luyao QIN, Jianming Ling
      The deformation of piezoelectric transducer and asphalt pavement differ because of their different stiffness. As the piezoelectric transducer is embedded in asphalt pavement, the differential deformation may cause a non-uniform stress and degrade their performance. In this paper, the synergistic performance of piezoelectric transducer and asphalt pavement is studied through finite element analysis. Results show that the energy conversion efficiency of the transducers decreases with increasing burial depth and modulus of surface course. Under the vehicle loading, the piezoelectric transducer and asphalt pavement are easily separated by shear stress. For the asphalt pavement, the change in the stress of pavement structure and surface deflection is very small, which means that the differential deformation has no effect on fatigue cracking. Furthermore, an energy harvesting system composed by transducers array and asphalt plate is made and evaluated in laboratory. Results show that the transducers within asphalt pavement have acceptable efficiency and high durability.

      PubDate: 2017-11-23T05:29:06Z
      DOI: 10.1016/j.ijprt.2017.09.008
       
  • Framework for determining material genome of granular materials: Material
           characterization and numerical simulation at multiple spatial scales

    • Authors: Wenjuan Sun; Wenjing Xue; Yinning Zhang; Linbing Wang
      Abstract: Publication date: Available online 11 November 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Wenjuan Sun, Wenjing Xue, Yinning Zhang, Linbing Wang
      Inspired by Human Genome Project, material genome initiative was launched in 2011 by the White House for the U.S., and similar research projects have also been funded in the other countries worldwide. While extending the genome idea from human to materials, the genome of granular materials is considered to be consisting of mineral compositions, crystal structure, and inherent defects. We envision the development of a database for the genome of sands by collecting the results of laboratory experiments at multiple scales. With the advancement of computational techniques and low-cost hardware, multiscale multiphysics models can be established according to the genome of granular materials from experimental-based database. This paper proposes a framework for determining genome of granular materials through laboratory experiments and numerical simulations. Some preliminary results have provided for determining the genome of granular materials, with anticipated benefits as follows: (i) promote the design of new granular materials and/or civil engineering materials with targeted properties, (ii) shorten the process from discovery to application of new civil engineering materials, and (iii) provide comprehensive insights into the influence of material genomes on mechanical performances from first-principle.

      PubDate: 2017-11-23T05:29:06Z
      DOI: 10.1016/j.ijprt.2017.11.003
       
  • In-Situ and Laboratory Investigation of Modified Drilling Waste Materials
           Applied on Base-Course Construction

    • Authors: Chang-Seon Shon; Cindy K. Estakhri
      Abstract: Publication date: Available online 10 November 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Chang-Seon Shon, Cindy K. Estakhri
      This study focuses on in-situ and laboratory evaluation of modified drilling waste materials (MDWMs) applied on base course construction. Cement treated drilling waste materials have been used on a limited basis for full-depth base repair on Texas Department of Transportation (TxDOT) low volume roads. A road inspection was made of full-scale county roads that were constructed with the MDWMs. Field test results measured by the falling weight deflectomer (FWD) showed reasonable in-situ strengths. The MDWMs section had stiffness values similar to those typically observed for newly constructed flexible bases. The old, in-service flexible base adjacent to the MDWMs section exhibited values half that of the MDWMs. Cores removed from the field also had significantly higher strength values than the lab-molded samples. Moreover, the other non-TxDOT low volume county roads using MDWMs exhibited good field performance. From this observation, it is concluded that this material clearly has some unique engineering properties which has the ability to gain strength with time though weak initially and there is the potential applicability used in the low volume roadway.

      PubDate: 2017-11-11T00:46:53Z
      DOI: 10.1016/j.ijprt.2017.11.001
       
  • Review of Ice and Snow Runway Pavements

    • Authors: Greg White; Adrian McCallum
      Abstract: Publication date: Available online 10 November 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Greg White, Adrian McCallum
      Antarctica is the highest, driest, coldest, windiest, most remote and most pristine place on Earth. Polar operations depend heavily on air transportation and support for personnel and equipment. It follows that improvement in snow and ice runway design, construction and maintenance will directly benefit polar exploration and research. Current technologies and design methods for snow and ice runways remain largely reliant on work performed in the 1950s and 1960s. This paper reviews the design and construction of polar runways using snow and ice as geomaterials. The inability to change existing snow and ice thickness or temperature creates a challenge for polar runway design and construction, as does the highly complex mechanical behaviour of snow, including the phenomena known as sintering. It is recommended that a modern approach be developed for ice and snow runway design, based on conventional rigid and flexible pavement design principles. This requires the development on an analytical model for the prediction of snow strength, based on snow age, temperature history and density. It is also recommended that the feasibility of constructing a snow runway at the South Pole be revisited, in light of contemporary snow sintering methods. Such a runway would represent a revolutionary advance for the logistical support of Antarctic research efforts.

      PubDate: 2017-11-11T00:46:53Z
      DOI: 10.1016/j.ijprt.2017.11.002
       
  • Multi-parametric characterization of mode I fracture toughness of asphalt
           concrete: Influence of void and RA contents, binder and aggregate types

    • Authors: Saannibe Ciryle Somé; Montassar Abdhelack Fredj; Mai-Lan Nguyen; Arnaud Feeser; Alexandre Pavoine
      Abstract: Publication date: Available online 2 November 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Saannibe Ciryle Somé, Montassar Abdhelack Fredj, Mai-Lan Nguyen, Arnaud Feeser, Alexandre Pavoine
      This study aims to evaluate the fracture toughness ( K Ic ) in mode I cracking using semi-circular bending test (SCB). Experiment has been performed to investigate the influence of bitumen grade (using P15/25 and P50/70 bitumens), reclaimed asphalt (RA) content (using 0%, 20% and 40% RA contents) and temperature (using −20 °C, −5 °C, 10 °C test temperatures), through ANOVA. Additional investigations have been performed: (i) to evaluate the effect of the use of polymer modified bitumen (PMB), (ii) to evaluate the effect compactness using 5% and 8% air void contents, (iii) to evaluate the effect of aggregate type using siliceous-limestone and porphyry aggregates. The results show an important decrease in K Ic when temperature increases from −5 °C to 10 °C and a slight decrease between −20 °C and −5 °C. The results also show that increasing RA content increases slightly the K Ic . It was found from the ANOVA that the influent parameters can be ranked as follows: temperature, RA content and binder grade. The investigations show that PMB increases the K Ic value than pure bitumens. Porphyry aggregates increase the K Ic by about 16% than silica-limestone aggregates at low temperatures between −20 °C and −5 °C. However, this ranking is slightly inverted at 10 °C. In addition, K Ic decreases by about 12% at 10 °C with an increase in air voids (by 5% to 8%). Void content effect is more significant at −5 °C and 10 °C, and negligible at −20 °C.

      PubDate: 2017-11-03T21:28:10Z
      DOI: 10.1016/j.ijprt.2017.10.004
       
  • Analysis of Coarse Aggregate Performance Based on the Modified Micro Deval
           Abrasion Test

    • Authors: Jiangfeng Wu; Yue Hou; Linbing Wang; Meng Guo; Lingjian Meng; Haocheng Xiong
      Abstract: Publication date: Available online 16 October 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Jiangfeng Wu, Yue Hou, Linbing Wang, Meng Guo, Lingjian Meng, Haocheng Xiong
      The anti-abrasion property of aggregate significantly affects the performance of the pavement. In this research, the quartzite and gneiss which were produced in Lincheng County, Xingtai City, Hebei Province were selected as test samples. According to the American Society for Testing and Materials standard, the Micro-Deval abrasion test was taken every 1000 rotation times until 20 000 times, and the change trend of the Micro-Deval abrasion value was obtained. Results showed that the abrasion values were in the exponential growth rate rather than linear rate. Their R-Square coefficient were 0.99142 and 0.99916 respectively. The gravel information such as area, roundness, diameter, perimeter and so on were calculated and analyzed by Image-Pro Plus software, which provided a rapid way for the 2D morphology characteristics analysis of the coarse aggregate.

      PubDate: 2017-10-19T13:07:29Z
      DOI: 10.1016/j.ijprt.2017.10.007
       
  • Recent advancement on asphalt pavement research and technologies

    • Authors: Zhanping You; Hainian Wang; Yu Liu; Xu Yang
      Abstract: Publication date: Available online 6 October 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Zhanping You, Hainian Wang, Yu Liu, Xu Yang


      PubDate: 2017-10-13T10:51:03Z
      DOI: 10.1016/j.ijprt.2017.10.002
       
  • Quasi-static analysis of flexible pavements based on predicted frequencies
           using Fast Fourier Transform and Artificial Neural Network

    • Authors: Ali Reza Ghanizadeh; Mansour Fakhri
      Abstract: Publication date: Available online 21 September 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Ali Reza Ghanizadeh, Mansour Fakhri
      New trend in design of flexible pavements is mechanistic-empirical approach. The first step for applying this method is analyzing the pavement structure for several times and computation of critical stresses and strains, which needs a fast analysis method with good accuracy. This paper aims to introduce a new rapid pavement analysis approach, which can consider the history of loading and rate effect. To this end, 1200 flexible pavement sections were analyzed, and equivalent frequencies (EF) were calculated using Fast Fourier Transform (FFT) method at various depths of asphalt layer. A nonlinear regression equation has been presented for determining EF at different depths of asphalt layer. For more accurate predicting of EF at low frequencies, a feed-forward Artificial Neural Network (ANN) was employed, which allows accurate prediction of EF. The frequencies obtained by the proposed regression equation and ANN were compared with frequencies observed in Virginia Smart Road project, and it was found that there is a good agreement between observed and predicted frequencies. Comparison of quasi-static analysis of flexible pavements by frequencies obtained using FFT method and full dynamic analysis by 3D-Move program approves that the critical responses of pavement computed by proposed quasi-static analysis approach are comparable to critical responses computed using full dynamic analysis.

      PubDate: 2017-09-28T12:27:20Z
      DOI: 10.1016/j.ijprt.2017.09.002
       
  • Aggregate Fatigue Failure on Macro Texture Polishing of Asphalt Pavement

    • Authors: Zhenyu Qian; Yinghao Miao; Haocheng Xiong; Linbing Wang
      Abstract: Publication date: Available online 20 September 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Zhenyu Qian, Yinghao Miao, Haocheng Xiong, Linbing Wang
      The macro-texture of asphalt pavement greatly affects the traffic safety of driving. In this study, the 3D laser scanning data, which is captured from the pavements, is used for reverse modeling. FE software ANSYS is used to analyze the contact stress distribution of pavement macro-texture and tire. The results shows that the macro texture will be affected by fatigue failure considering the size effect of coarse aggregate. The fatigue life distribution of pavements is analyzed using the fatigue analysis software FE-SAFE which is based on linear cumulative damage theory. The developing tendency of texture depth with respect to the number of loading times is obtained by analyzing the results of fatigue life. Compared with the results of accelerated loading test shows that the factor of fatigue failure has remarkably affected the macro texture under low loading times. This effect is gradually decreased with the increasing of cyclic loading times.

      PubDate: 2017-09-21T08:07:02Z
      DOI: 10.1016/j.ijprt.2017.09.009
       
  • Sensitivity Analysis of the Mainline Travel Lane Pavement Service Life
           When Utilizing Part-Time Shoulder Use with Full Depth Paved Shoulders

    • Authors: Sean Coffey; Seri Park; Leslie Myers McCarthy
      Abstract: Publication date: Available online 20 September 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Sean Coffey, Seri Park, Leslie Myers McCarthy
      Part-time Shoulder Use (PTSU) is an Active Traffic Management (ATM) strategy that utilizes the shoulder as an additional travel lane during high congestion periods to temporarily increase roadway capacity. This strategy has become increasingly popular on freeways around major metropolitan areas in the United States (U.S.) and Europe. This research focused on freeways near major metropolitan areas where the roadways are structurally sound, but widening roadways has become increasingly expensive to implement. These areas typically utilize full-depth paved shoulders, defined as shoulders built to the same pavement structural profile as the mainline travel lanes and structurally sufficient to carry heavy vehicle loading. As a result of PTSU, the load repetitions on the mainline travel lanes can be reduced for multiple hours during each day by shifting vehicles to the shoulder and this load reduction may indirectly increase the mainline pavement’s service life. This research explored the potential benefits of PTSU based on a variety of conditions, including climate conditions, pavement types, and traffic loading levels. The results suggest that across all of these conditions an extension of 10 to 20% in service life can be expected for both flexible and rigid pavements in the mainline travel lanes.

      PubDate: 2017-09-21T08:07:02Z
      DOI: 10.1016/j.ijprt.2017.09.003
       
  • Laboratory Characterization of Asphalt Binders Modified with Waste
           Vegetable Oil Using SuperPave Specifications

    • Authors: Aslam A. Al-Omari; Taisir S. Khedaywi; Mohammad A. Khasawneh
      Abstract: Publication date: Available online 19 September 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Aslam A. Al-Omari, Taisir S. Khedaywi, Mohammad A. Khasawneh
      The goal of this study is to check the validity of using the waste vegetable oil as an additive to the asphalt cement, to be used later in the construction of flexible pavements. This will be considered as a proper and legal method of disposing this waste material. In this study, 1%, 2%, 4%, 6%, and 8% of waste vegetable oil by volume of the asphalt cement were used. Several laboratory tests were performed on the original and waste vegetable oil -modified asphalt cements. It was found that choosing the appropriate amount of waste vegetable oil will improve most of the tested properties. Therefore, it can be concluded that using the suitable amount of waste vegetable oil as a cement modifier is feasible, and can be considered as a proper and legal method for disposing the waste vegetable oil.

      PubDate: 2017-09-21T08:07:02Z
      DOI: 10.1016/j.ijprt.2017.09.004
       
  • Study on the Microscopic Friction Between Tire and Asphalt Pavement Based
           on Molecular Dynamics Simulation

    • Authors: Yue Hou; Hanfei Zhang; Jiangfeng Wu; Linbing Wang; Haocheng Xiong
      Abstract: Publication date: Available online 18 September 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Yue Hou, Hanfei Zhang, Jiangfeng Wu, Linbing Wang, Haocheng Xiong
      Good pavement friction performance between tire and asphalt pavement is the prerequisite to ensure traffic safety and driving comfortability. In this paper, the microscopic friction between tire and asphalt pavement is studied using the Material Studio and LAMMPS software. A 3D contact model of tire, asphalt layer and the substrate layer is established. The Molecular Dynamics (MD) simulation is conducted to simulate the friction behavior under different environments. The influence of different environmental conditions including vehicle speed (20∼120km/h) and pavement surface temperature (-30∼35°C) on the pavement surface friction coefficient is also studied. Simulation results show that vehicle speed and pavement surface temperature have significant effects on the friction coefficient at microscale.

      PubDate: 2017-09-21T08:07:02Z
      DOI: 10.1016/j.ijprt.2017.09.001
       
  • A preliminary study on the highway piezoelectric power supply system

    • Authors: Hailu Yang; Linbing Wang; Bin Zhou; Ya Wei; Qian Zhao
      Abstract: Publication date: Available online 9 September 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Hailu Yang, Linbing Wang, Bin Zhou, Ya Wei, Qian Zhao
      Pavement piezoelectric energy harvesting technique is to use a Piezoelectric Energy Harvester (PEH) to convert the mechanical energy of vehicles into electrical energy. A lot of research has been done on the technology of piezoelectric energy collection, but it is mainly focused on the theoretical model and the laboratory tests and lacks the on-site performance evaluation. In this paper, a stacked array type PEH is designed with protection package, which can improve the performance and the service life of the PEH. The demonstration project is also carried out to test the field performance. It is found that under the actual vehicle loading, the obtained piezoelectric energy can successfully light LED signs.

      PubDate: 2017-09-16T00:55:12Z
      DOI: 10.1016/j.ijprt.2017.08.006
       
 
 
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