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  Subjects -> ENGINEERING (Total: 2268 journals)
    - CHEMICAL ENGINEERING (190 journals)
    - CIVIL ENGINEERING (183 journals)
    - ELECTRICAL ENGINEERING (103 journals)
    - ENGINEERING (1201 journals)
    - ENGINEERING MECHANICS AND MATERIALS (380 journals)
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CIVIL ENGINEERING (183 journals)                     

Showing 1 - 183 of 183 Journals sorted alphabetically
ACI Structural Journal     Full-text available via subscription   (Followers: 17)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 2)
Acta Structilia : Journal for the Physical and Development Sciences     Open Access   (Followers: 2)
Advances in Civil Engineering     Open Access   (Followers: 35)
Advances in Structural Engineering     Full-text available via subscription   (Followers: 28)
Ambiente Construído     Open Access   (Followers: 1)
American Journal of Civil Engineering and Architecture     Open Access   (Followers: 30)
Architectural Engineering     Open Access   (Followers: 4)
Archives of Civil and Mechanical Engineering     Full-text available via subscription   (Followers: 1)
Archives of Civil Engineering     Open Access   (Followers: 10)
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: 10)
BER : Building Contractors' Survey     Full-text available via subscription   (Followers: 4)
BER : Building Sub-Contractors' Survey     Full-text available via subscription   (Followers: 3)
BER : Survey of Business Conditions in Building and Construction : An Executive Summary     Full-text available via subscription   (Followers: 4)
Bioinspired Materials     Open Access   (Followers: 5)
Bridge Structures : Assessment, Design and Construction     Hybrid Journal   (Followers: 15)
Building and Environment     Hybrid Journal   (Followers: 15)
Building Women     Full-text available via subscription  
Built Environment Project and Asset Management     Hybrid Journal   (Followers: 15)
Bulletin of Pridniprovsk State Academy of Civil Engineering and Architecture     Open Access   (Followers: 6)
Canadian Journal of Civil Engineering     Hybrid Journal   (Followers: 12)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 8)
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: 17)
Challenge Journal of Concrete Research Letters     Open Access   (Followers: 2)
Challenge Journal of Structural Mechanics     Open Access   (Followers: 5)
Change Over Time     Full-text available via subscription   (Followers: 2)
Civil and Environmental Engineering     Open Access   (Followers: 7)
Civil And Environmental Engineering Reports     Open Access   (Followers: 5)
Civil and Environmental Research     Open Access   (Followers: 19)
Civil Engineering = Siviele Ingenieurswese     Full-text available via subscription   (Followers: 4)
Civil Engineering and Architecture     Open Access   (Followers: 17)
Civil Engineering and Environmental Systems     Hybrid Journal   (Followers: 3)
Civil Engineering and Technology     Open Access   (Followers: 10)
Civil Engineering Dimension     Open Access   (Followers: 8)
Cohesion and Structure     Full-text available via subscription   (Followers: 2)
Composite Structures     Hybrid Journal   (Followers: 265)
Computer-aided Civil and Infrastructure Engineering     Hybrid Journal   (Followers: 11)
Computers & Structures     Hybrid Journal   (Followers: 36)
Concrete Research Letters     Open Access   (Followers: 6)
Construction Economics and Building     Open Access   (Followers: 2)
Construction Engineering     Open Access   (Followers: 9)
Construction Management and Economics     Hybrid Journal   (Followers: 22)
Construction Science     Open Access   (Followers: 4)
Constructive Approximation     Hybrid Journal  
Curved and Layered Structures     Open Access   (Followers: 2)
DFI Journal : The Journal of the Deep Foundations Institute     Hybrid Journal   (Followers: 1)
Earthquake Engineering and Structural Dynamics     Hybrid Journal   (Followers: 16)
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: 14)
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: 16)
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: 4)
Geosystem Engineering     Hybrid Journal   (Followers: 1)
Geotechnik     Hybrid Journal   (Followers: 3)
Géotechnique Letters     Hybrid Journal   (Followers: 6)
HBRC Journal     Open Access   (Followers: 2)
Hormigón y Acero     Full-text available via subscription  
HVAC&R Research     Hybrid Journal  
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: 22)
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: 16)
International Journal of Civil, Mechanical and Energy Science     Open Access   (Followers: 1)
International Journal of Concrete Structures and Materials     Open Access   (Followers: 14)
International Journal of Condition Monitoring     Full-text available via subscription   (Followers: 2)
International Journal of Construction Engineering and Management     Open Access   (Followers: 9)
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: 5)
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: 10)
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: 4)
International Journal of Sustainable Construction Engineering and Technology     Open Access   (Followers: 8)
International Journal on Pavement Engineering & Asphalt Technology     Open Access   (Followers: 6)
International Journal Sustainable Construction & Design     Open Access  
Journal of Bridge Engineering     Full-text available via subscription   (Followers: 15)
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: 6)
Journal of Civil Engineering and Construction Technology     Open Access   (Followers: 12)
Journal of Civil Engineering and Management     Hybrid Journal   (Followers: 7)
Journal of Civil Engineering and Science     Open Access   (Followers: 7)
Journal of Civil Engineering Research     Open Access   (Followers: 6)
Journal of Civil Society     Hybrid Journal   (Followers: 4)
Journal of Civil Structural Health Monitoring     Hybrid Journal   (Followers: 4)
Journal of Composites for Construction     Full-text available via subscription   (Followers: 13)
Journal of Computing in Civil Engineering     Full-text available via subscription   (Followers: 24)
Journal of Construction Engineering     Open Access   (Followers: 7)
Journal of Construction Engineering and Management     Full-text available via subscription   (Followers: 19)
Journal of Constructional Steel Research     Hybrid Journal   (Followers: 8)
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: 11)
Journal of Highway and Transportation Research and Development (English Edition)     Full-text available via subscription   (Followers: 13)
Journal of Infrastructure Systems     Full-text available via subscription   (Followers: 21)
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: 10)
Journal of Nondestructive Evaluation     Hybrid Journal   (Followers: 11)
Journal of Performance of Constructed Facilities     Full-text available via subscription   (Followers: 4)
Journal of Pipeline Systems Engineering and Practice     Full-text available via subscription   (Followers: 7)
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: 40)
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: 4)
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  
Mathematical Modelling in Civil Engineering     Open Access   (Followers: 3)
Nondestructive Testing And Evaluation     Hybrid Journal   (Followers: 17)
Obras y Proyectos     Open Access   (Followers: 1)
Open Journal of Civil Engineering     Open Access   (Followers: 7)
Photonics and Nanostructures - Fundamentals and Applications     Hybrid Journal   (Followers: 2)
Practice Periodical on Structural Design and Construction     Full-text available via subscription   (Followers: 4)
Proceedings of the Institution of Civil Engineers - Bridge Engineering     Hybrid Journal   (Followers: 7)
Proceedings of the Institution of Civil Engineers - Civil Engineering     Hybrid Journal   (Followers: 11)
Proceedings of the Institution of Civil Engineers - Management, Procurement and Law     Hybrid Journal   (Followers: 8)
Proceedings of the Institution of Civil Engineers - Municipal Engineer     Hybrid Journal   (Followers: 3)
Proceedings of the Institution of Civil Engineers - Structures and Buildings     Hybrid Journal   (Followers: 4)
Random Structures and Algorithms     Hybrid Journal   (Followers: 5)
Research in Nondestructive Evaluation     Hybrid Journal   (Followers: 7)
Revista IBRACON de Estruturas e Materiais     Open Access   (Followers: 1)
Road Materials and Pavement Design     Hybrid Journal   (Followers: 10)
Russian Journal of Nondestructive Testing     Hybrid Journal   (Followers: 6)
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: 4)
Steel Construction - Design and Research     Hybrid Journal   (Followers: 3)
Structural and Multidisciplinary Optimization     Hybrid Journal   (Followers: 9)
Structural Concrete     Hybrid Journal   (Followers: 11)
Structural Control and Health Monitoring     Hybrid Journal   (Followers: 9)
Structural Engineering International     Full-text available via subscription   (Followers: 11)
Structural Safety     Hybrid Journal   (Followers: 7)
Structural Survey     Hybrid Journal  
Structure     Full-text available via subscription   (Followers: 23)
Structure and Infrastructure Engineering: Maintenance, Management, Life-Cycle Design and Performance     Hybrid Journal   (Followers: 13)
Structures     Hybrid Journal   (Followers: 1)
Study of Civil Engineering and Architecture     Open Access   (Followers: 8)
Superlattices and Microstructures     Hybrid Journal   (Followers: 2)
Surface Innovations     Hybrid Journal  
Technical Report Civil and Architectural Engineering     Open Access  
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: 6)
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]   [5 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Online) 1996-6814
   Published by Elsevier Homepage  [3048 journals]
  • Comparing the effects of oil palm kernel shell and cockle shell on
           properties of pervious concrete pavement

    • Authors: Elnaz Khankhaje; Mohd Razman Salim; Jahangir Mirza; Salmiati; Mohd Warid Hussin; Rawid Khan; Mahdi Rafieizonooz
      Pages: 113 - 120
      Abstract: Publication date: Available online 1 June 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Elnaz Khankhaje, Mahdi Rafieizonooz, Mohd Razman Salim, Jahangir Mirza, Salmiati, Mohd Warid Hussin
      Nowadays, pervious concrete pavement is one of the best materials used in construction industry as a top layer of permeable pavement system to control the storm water at source. In addition, increasing production of waste materials, increased the interest in utilising the waste materials for environmental and technical benefits. Therefore, this paper compared the effect of using two different sizes of oil palm kernel shell (OPKS) and cockleshell (CS) as partial replacement of natural coarse aggregate on properties of pervious concrete pavement. Thirteen mixtures were made, in which 6.30-mm natural gravel was replaced with 0, 25, 50 and 75% of 6.30-mm and 4.75-mm of both shells. The relationships between the properties of pervious concrete mixtures were also determined. The replacement of OPKS and CS as the natural aggregate decreased the compressive strength, while the angular shape of both shells caused higher void content and permeability as compared to those of control pervious concrete. On the other hand, pervious concrete containing CS showed better properties than those of incorporating OPKS. Apart from that, strong relationships between density, void content, permeability, compressive strength values indicated that they can be used as a pervious concrete quality control tests for prediction of properties of pervious concrete pavement before placement in the field.

      PubDate: 2017-06-02T17:24:00Z
      DOI: 10.1016/j.apacoust.2017.02.014
      Issue No: Vol. 122 (2017)
       
  • 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
       
  • Pavement mechanic response of sulfate saline soil subgrade section based
           on fluid–structure interaction model

    • Authors: Xueying Zhao; Aiqin Shen; Yinchuang Guo; Peng Li; Zhenhua Lv
      Pages: 497 - 506
      Abstract: Publication date: November 2017
      Source:International Journal of Pavement Research and Technology, Volume 10, Issue 6
      Author(s): Xueying Zhao, Aiqin Shen, Yinchuang Guo, Peng Li, Zhenhua Lv
      It is a consensus that salt heaving and frost heaving are urgent and typical distress in the sulfate saline soil area. To further investigate the microscopic performance of pavement structure in this special area, Jinan-Dongying Freeway in Shandong Province is selected as a case study engineering and the mechanic responses under salt heaving, frost heaving and traffic loads were analyzed through the finite element (FE) Program (ANSYS). In this paper, the process of salt heaving and frost heaving was divided into 3stages and FE models were established based on fluid–structure interaction (FSI) model. It is shown that under both effects of salt heaving and frost heaving, the tensile stress of asphalt surface course could be up to 96.75% of its tensile strength, which means its tensile strength was seriously inadequate; however, traffic loads could help to dramatically counteract effects of salt heaving and frost heaving, which could decrease 40–80% of the tensile stress in asphalt surface course. It is also shown that in Jinan-Dongying Freeway effects of salt heaving had slightly larger effects on pavement compared with that of frost heaving, probably because salt heaving occurred from the top to the bottom of subgrade. However, as a whole, in sulfate saline soil area, compared with general area, crack resistance of asphalt courses and foundation treatment should always be strengthened.

      PubDate: 2017-11-03T21:28:10Z
      DOI: 10.1016/j.ijprt.2017.03.006
       
  • Laboratory evaluation of pavement performance using modified asphalt
           mixture with a new composite reinforcing material

    • Authors: Zhen Fu; Wanqing Shen; Yue Huang; Guolin Hang; Xiaotong Li
      Pages: 507 - 516
      Abstract: Publication date: November 2017
      Source:International Journal of Pavement Research and Technology, Volume 10, Issue 6
      Author(s): Zhen Fu, Wanqing Shen, Yue Huang, Guolin Hang, Xiaotong Li
      As a new way of modifying asphalt or asphalt mixture, composite modification has obvious effects. In order to improve the performance of asphalt pavement in a simple, fast and efficient way, a new kind of composite reinforcing material (CRM) is used in this study. The Marshall Immersion test, the freeze–thaw splitting test and low-temperature bending test were conducted to evaluate the pavement performance of the asphalt mixture with different CRM contents. Test results show that the pavement performance of modified asphalt mixtures is better than unmodified asphalt mixture. When the CRM content increases, resistance to rutting at a high temperature increases significantly, low temperature cracking resistance and moisture damage resistance first rise and then fall. In consideration of other pavement performance, such as dynamic stability (DS), indirect tensile strength ratio (TSR) and maximum tensile strain, the suggested optimal CRM dosage is 5.9‰ to 7.9‰.

      PubDate: 2017-11-03T21:28:10Z
      DOI: 10.1016/j.ijprt.2017.04.001
       
  • Development and Application of an Instantaneous Impulsion-based Detector
           to Inspect the Degree of Compaction of the Cement-stabilized Macadam

    • Authors: Liqun Hu; Shuang Xia; Libing Xie; Zhuangzhuang Liu; Zhouxiaozheng Yang; Hao Huang
      Pages: 517 - 525
      Abstract: Publication date: November 2017
      Source:International Journal of Pavement Research and Technology, Volume 10, Issue 6
      Author(s): Liqun Hu, Shuang Xia, Libing Xie, Zhuangzhuang Liu, Zhouxiaozheng Yang, Hao Huang
      To inspect the degree of compaction of cement-stabilized macadam (CSM), a new detector was developed based on an instantaneous impulsion method. The degree of compaction could be assessed by the acceleration response value (ARV). To achieve the appropriate parameter of device, the gaskets, falling distance, and hammer weight were optimized. The correlation coefficient of degree of compaction and ARV were also improved. The instrument parameters and operability of the instrument were determined by a correlation coefficient and the device operability. The case study on two types of CSM with different degrees of compaction indicated that the ARV showed a highest linking with the degree of compaction when the gasket of DP-4 with a falling distance of 40cm and a hammer weight of 5.7kg. Compared to the falling distance and hammer weight, the type of gasket impacts highly on the correlation coefficient. The case study proves the new developed device with more than 0.8 (correlation coefficient).

      PubDate: 2017-11-03T21:28:10Z
      DOI: 10.1016/j.ijprt.2017.04.002
       
  • Dynamic response analysis of road-bridge transition section without slab

    • Authors: Juanlan Zhou; Mulian Zheng; Chongtao Wang; Wei Jing; Jiandang Meng; Jingxing Chen
      Pages: 526 - 535
      Abstract: Publication date: November 2017
      Source:International Journal of Pavement Research and Technology, Volume 10, Issue 6
      Author(s): Juanlan Zhou, Mulian Zheng, Chongtao Wang, Wei Jing, Jiandang Meng, Jingxing Chen
      The objective of this research is to investigate the pavement response of road-bridge transition section without slab under impact load caused by vehicle bumping. The three-dimensional (3D) finite element models (FEM) of road-bridge transition section without slab were developed to simulate the response under impact load. The influence of different parameters (damping ratio, step height, vehicle speed as well as axle load) on the pavement response was investigated. Results indicated that an obvious increase of pavement response was observed with the step height and axle load rising. On the contrary, the rise of vehicle speed and damping ratio led to the decrease of pavement response. In addition, the pavement under impact load exhibited larger response as compared to under static load. Therefore, the phenomenon that static load was considered only in the traditional pavement structure is defective. Finally, the correction coefficients of design index for highway asphalt pavement were proposed to consider the influence of impact load.

      PubDate: 2017-11-03T21:28:10Z
      DOI: 10.1016/j.ijprt.2017.04.004
       
  • The applicability of alkaline-resistant glass fiber in cement mortar of
           road pavement: Corrosion mechanism and performance analysis

    • Authors: Qin Xiaochun; Li Xiaoming; Cai Xiaopei
      Pages: 536 - 544
      Abstract: Publication date: November 2017
      Source:International Journal of Pavement Research and Technology, Volume 10, Issue 6
      Author(s): Qin Xiaochun, Li Xiaoming, Cai Xiaopei
      The main technical requirements of road pavement concrete are high flexural strength and fatigue durability. Adding glass fiber into concrete could greatly increase flexural strength and wearing resistance of concrete. However, glass fiber has the great potential of corrosion during the cement hydration, which will directly affect the long-term performance and strength stability. In this paper, accelerated corrosion experiments have been done to find out the corrosion mechanism and property of alkali-resistant glass fiber in cement mortar. The applicability and practicability of alkaline-resistant glass fiber in road concrete have been illustrated in the analysis of flexural strength changing trend of cement mortar mixed with different proportions of activated additives to protect the corrosion of glass fiber by cement mortar. The results have shown that a 30% addition of fly ash or 10% addition of silica fume to cement matrix could effectively improve the corrosion resistance of alkali-resistant glass fiber. The optimal mixing amount of alkali-resistant glass fiber should be about 1.0kg/m3 in consideration of ensuring the compressive strength of reinforced concrete in road pavement. The closest-packing method has been adopted in the mixture ratio design of alkali-resistant glass fiber reinforced concrete, not only to reduce the alkalinity of the cement matrix through large amount addition of activated additives but also to greatly enhance the flexural performance of concrete with the split pressure ratio improvement of 12.5–16.7%. The results suggested a prosperous application prospect for alkaline-resistant glass fiber reinforced concrete in road pavement.

      PubDate: 2017-11-03T21:28:10Z
      DOI: 10.1016/j.ijprt.2017.06.003
       
  • CTCP temperature fields and stresses

    • Authors: Minjiang Zhang; Chao Guo; Baoyang Yu; Yanhai Yang; Zhengran Lu
      Pages: 553 - 562
      Abstract: Publication date: November 2017
      Source:International Journal of Pavement Research and Technology, Volume 10, Issue 6
      Author(s): Minjiang Zhang, Chao Guo, Baoyang Yu, Yanhai Yang, Zhengran Lu
      Cross-tensioned concrete pavements (CTCPs) are used in the construction of continuous Portland cement concrete pavements. They eliminate the need for transverse joints and also restrict cracking of the pavement. A CTCP consists of three components, namely, the CTCP slab, the sand sliding layer (SSL), and the cement-stabilized macadam base, from top to down. The retard-bonded tendons (RBTs) of the CTCP slab are arranged diagonally. In the present study, a detailed 3D finite element model was developed and used to examine the temperature fields and stresses of a CTCP by thermal-mechanical coupling analysis, and the results were compared with field measurements. The model investigations revealed that, under typical cloudless summer conditions, the temperature field of the CTCP varied nonlinearly with both time and depth. The resultant step-type temperature gradient of the CTCP represents a significant deviation from that of a conventional pavement and impacts the thermal contact resistance of the SSL. It was found that the SSL could effectively reduce the temperature stresses in the CTCP, and that the residual temperature stresses were effectively resisted by the staged cross-tensioned RBTs. The potential problem areas in the vicinity of the temperature stresses were also investigated by the finite element method and field tests.

      PubDate: 2017-11-03T21:28:10Z
      DOI: 10.1016/j.ijprt.2017.03.003
       
  • 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
       
  • Investigating Influence of Mineral Filler at Asphalt Mixture and Mastic
           Scales

    • Authors: Aboelkasim Diab; Mahmoud Enieb
      Abstract: Publication date: Available online 31 October 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Aboelkasim Diab, Mahmoud Enieb
      This study is devoted to understand the mechanisms of mineral fillers in asphalt at the mixture and mastic scales. To do so, the physical properties of asphalt mixtures and mastics were evaluated; in addition, a chemical investigation was presented on the mastic scale for the sake of providing insight behind the possible mechanisms between asphalt binder and mineral filler. Three mineral fillers namely hydrated lime (HL), limestone (LS), and cement bypass dust (CD) were incorporated into an asphalt binder at different filler-to-binder (F/B) ratios. For the mechanistic evaluation of the mixtures, the indirect tensile strength (ITS), moisture damage evaluation, resilient modulus, and static creep-recovery tests were carried out. The fracture energies also were quantified for all the studied mixtures. The results of penetration and softening point tests, as well as their pertinent penetration index (PI), were discussed to elucidate some physical properties of the mastics. The nuclear magnetic resonance (NMR) spectroscopy was performed on the mastics to obtain information on molecular structures of the formed composites. The findings of this study emphasize that the physical properties of mixtures and mastics are highly dependent on type and concentration of mineral filler. The 1H-NMR and 13C-NMR results proved that the inclusion of the studied fillers did not change the molecular structure of the base asphalt binder; hereby the physical mechanisms stand behind the attained properties. It is believed that the findings of this work would contribute to growing knowledge of the mechanisms of mineral fillers in asphalt mixtures.

      PubDate: 2017-11-03T21:28:10Z
      DOI: 10.1016/j.ijprt.2017.10.008
       
  • Accelerated pavement testing efforts using the heavy vehicle simulator

    • Authors: L. du Plessis; A. Ulloa-Calderon; J.T. Harvey; N.F Coetzee
      Abstract: Publication date: Available online 28 October 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): L. du Plessis, A. Ulloa-Calderon, J.T. Harvey, N.F Coetzee
      This paper provides a brief description of the technological developments involved in the development and use of the Heavy Vehicle Simulator (HVS) accelerated pavement testing equipment. This covers the period from concept in the late 1960’s, to the current state-of-the art HVS Mk-VI and highlights the development and improvements being built into the Mk VI. It also provides a brief overview of the research performed by the various accelerated testing programs currently using the HVS as their accelerated testing tool, which include the Gauteng Provincial Department of Transportation and the CSIR (South Africa), the UC Pavement Research Center (California), the U.S Army Corps of Engineers Engineering Research and Development Center (CRREL and WES), the Florida DOT HVS test program, the US Federal Aviation Administration (FAA), the HVS programs of the University of Costa Rica and the Mexico Institute of Transportation amongst others. Brief descriptions of HVS research and summaries of key results from these programs are provided. Planned research is covered where available.

      PubDate: 2017-11-03T21:28:10Z
      DOI: 10.1016/j.ijprt.2017.09.016
       
  • Warm mix asphalt: chemical additives effects on bitumen properties and
           limestone aggregates mixture compactibility

    • Authors: Raul Pereira; Ana Almeida-Costa; Cátia Duarte; Agostinho Benta
      Abstract: Publication date: Available online 26 October 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Raul Pereira, Ana Almeida-Costa, Cátia Duarte, Agostinho Benta
      Asphalt industries consume large amounts of fuels and emit pollutants gases into the atmosphere. Warm mix asphalt is the most recognized way to minimize these negative impacts, which have given rise to numerous issues related to their performance and the materials used. In this study, the basic and rheological properties of three different bituminous binders, modified with two different chemical additives, were evaluated, determining their behaviour and susceptibility to modification. The results showed that, although chemical additives do not affect the binder by reducing its viscosity, they act on the mixture, allowing to improve its compactability and, consequently, reduce the required production and compaction temperatures.

      PubDate: 2017-10-27T16:31:31Z
      DOI: 10.1016/j.ijprt.2017.10.005
       
  • Predicting the Impact of Temperature and Stress on the Glasphalt Mixtures
           Rutting Behavior

    • Authors: Mostafa Sadeghnejad; Mahayar Arabani; Mohammad Taghipoor
      Abstract: Publication date: Available online 18 October 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Mostafa Sadeghnejad, Mahayar Arabani, Mohammad Taghipoor
      In recent years the use of additives in asphalt mixtures has increased to strengthen them against dynamic loads considerably. New researches have shown that the optimal use of waste glass in hot mix asphalt mixtures increases its dynamic characteristics dramatically. The purpose of this study is to predict the impact of temperature and stress on the glasphalt mixture rutting behavior. In order to achieve the objectives of this study, ABAQUS software has been used. To achieve this goal, the results of repeated load axial test were used to model the rutting behavior of asphalt mixtures in wheel track test. The results of this study show that the presented models in this study are well able to predict the rutting of glasphalt mixtures at different temperatures and stresses. Also the results of models show that the waste glass powder is able to improve the performance of asphalt mixtures against permanent deformation significantly.

      PubDate: 2017-10-19T13:07:29Z
      DOI: 10.1016/j.ijprt.2017.10.006
       
  • 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
       
  • Fracture resistance of asphalt concrete modified with crumb rubber at low
           temperatures

    • Authors: A. Razmi; M.M. Mirsayar
      Abstract: Publication date: Available online 12 October 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): A. Razmi, M.M. Mirsayar
      The main objective of this study is to obtain fracture toughness of asphalt concrete modified by Crumb Rubber (CR) and Sasobit at low temperatures. First, Bending Beam Rheometer (BBR) test was performed on unmodified binder (binder 60/70), binder 60/70+3%Sasobit and 20%CR +3%Sasobit modified asphalt binder to find how each modifier affect asphalt binder stiffness and relaxation rate at low temperatures. Mixed mode I/II fracture tests were conducted by cracked Semi-Circular Bending (SCB) specimens and the critical stress intensity factors were calculated for pure mode I, mixed mode I/II and pure mode II conditions. Results of BBR tests indicated that 20%CR +3%Sasobit reduces stiffness and the m-value increase at low temperatures. As a result, 20%CR+3%Sasobit has positive effect on low temperatures performance by improving thermal cracking resistance. Also, according to the fracture toughness test results, the Warm Mix Asphalt (WMA) mixture containing 20% CR, shows higher resistance against crack growth than WMA mixture. It was found that mixed mode I/II can be more detrimental than pure mode I and II conditions.

      PubDate: 2017-10-13T10:51:03Z
      DOI: 10.1016/j.ijprt.2017.10.003
       
  • Evolution of tyre/road noise research in India: Investigations using
           Statistical Pass-By method and noise trailer

    • Authors: Vivek Khan; Krishna Prapoorna Biligiri
      Abstract: Publication date: Available online 7 October 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Vivek Khan, Krishna Prapoorna Biligiri
      The objective of this research study was to investigate and analyze the acoustical characteristics of asphalt concrete and cement concrete surface types by two noise measurement techniques: statistical pass-by (SPB) and Close Proximity (CPX) methods. A noise trailer was devised and manufactured as part of the CPX methodology to evaluate tyre/pavement noise interaction at source. Two national highway test sections covering over 11 km of asphalt and cement concrete surfaces were selected to carry out the noise measurements, and the effects of vehicle speeds and/or sizes on the overall noise profiles were investigated. The major contribution of this first of its kind study in India was the utilization of sophisticated tools and techniques to measure the tyre/pavement interaction noise at source through CPX, which helped correlate the influence of road surfaces on the generation of overall road traffic noise using SPB technique. The SPB method noise profiles revealed that the noise pressure levels increased with increasing vehicle speeds and weights. The noise trailer CPX findings corroborated the results obtained from the SPB method in that cement concrete surface produced a higher noise at source than that of the asphalt concrete surface by about 5 dBA. Further, there was about 5 dBA differential in noise between SPB and CPX methods for cement concrete pavement sections; also, there was about 10 dBA differential in noise between the two methods for asphalt concrete pavement stretches.

      PubDate: 2017-10-13T10:51:03Z
      DOI: 10.1016/j.ijprt.2017.09.018
       
  • Investigation of Load Transfer Efficiency in Jointed Plain Concrete
           Pavements (JPCP) using FEM

    • Authors: Vahid sadeghi; Saeid Hesami
      Abstract: Publication date: Available online 6 October 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Vahid sadeghi, Saeid Hesami
      Owing to heavy traffic loads, rigid pavements encounter various types of failures at transverse joints during their lifetime. Three-dimensional finite-element method (3D-FEM) was used to assess the structural response of jointed concrete pavement under moving tandem axle loads. In this study, 3D FEM was verified using an existing numerical model and field measurement of the concrete slab traversed by a moving truck. This paper also investigated the effects of multiple parameters: material properties, slab geometry, load magnitude and frictional status of the slab and base layer on load transfer efficiency (LTE) of the transverse joints. Further study has been done to investigate the slab performance without the dowel bars which occurs when parts of the pavement needed to be repaired using precast slabs. The aggregate interlock between the new slab and the existing slab is simulated by frictional interface. In 3D FEM model, the load transfer efficiency has been improved by increasing the elasticity modules of the concrete slab and the base layer or increasing the slab thickness. This can decrease the joints' deflections, reduces the damages on pavement joints. Removing dowel bars adversely affected the load transfer.

      PubDate: 2017-10-13T10:51:03Z
      DOI: 10.1016/j.ijprt.2017.10.001
       
  • 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
       
  • Using Atomic Force Microscopy and Molecular Dynamics Simulation to
           Investigate the Asphalt Micro Properties

    • Authors: Meng Guo; Yucheng Huang; Linbing Wang; Jianxin Yu; Yue Hou
      Abstract: Publication date: Available online 29 September 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Meng Guo, Yucheng Huang, Linbing Wang, Jianxin Yu, Yue Hou
      In this study, the asphalt microstructure and micro mechanical properties are first investigated using Atomic Force Microscopy (AFM) experiments. The AFM experiment results show that the asphalt samples have very complex microstructure morphology. The Molecular Dynamics (MD) Simulation is then conducted to model the asphalt molecular structure. A tension loading is applied on the asphalt structure. It is discovered that the structure will be gradually stretched and the potential energy for van der Waals interactions takes a major part in the total energy. The effect of molecules number on the MD results was analyzed. The phase field method was also used to simulate the micro mechanical properties considering the material viscoelasticity.

      PubDate: 2017-10-05T18:55:11Z
      DOI: 10.1016/j.ijprt.2017.09.017
       
  • Effects of crumb rubber content and curing time on the properties of
           asphalt concrete and stone mastic asphalt using dry process

    • Authors: Huynh Tan Tai Nguyen; Thien Nhan Tran
      Abstract: Publication date: Available online 28 September 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Huynh Tan Tai Nguyen, Thien Nhan Tran
      Along with the rapid increase in the number of road vehicles, a large amount of waste tires have been created, causing negative effects to the environment. Many attempts have been made to effectively reduce this type of solid waste including the reuse of recycled rubber powder from waste tires as an additive for improving the performance of asphalt mixtures. In this work, the authors aim to study the effects of crumb rubber (CR) on the mechanical properties, especially the rutting resistance, of CR modified asphalt concrete (AC) and stone mastic asphalt (SMA) by varying two factors-namely, the content of additive and the curing time. The dimension of used CR ranges from 0 to 2.36 mm, which is not too coarse for promoting the CR–bitumen interaction and not too fine for facilitating the production of CR. The content of CR was increased gradually from 0 to 3% to examine the effects of CR content on the engineering properties and determine the optimal content in the mixture. It was observed that the optimal content is 1.5-2%, while the optimal curing time that contributes to the maximal increase in the mechanical characteristics of both mixtures could not be determined. In the range of 0-5h of curing time, the longer the asphalt mixture is maintained at high temperature, the better the performance of mixture will be. Ageing was found to have influence on the performance of asphalt mixtures; however, its effects are not as important as those of CR modification.

      PubDate: 2017-10-05T18:55:11Z
      DOI: 10.1016/j.ijprt.2017.09.014
       
  • Application of Analytic Hierarchy Process in Network Level Pavement
           Maintenance Decision-making

    • Authors: Hongmei Li; Fujian Ni; Qiao Dong; Yuqin Zhu
      Abstract: Publication date: Available online 27 September 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Hongmei Li, Fujian Ni, Qiao Dong, Yuqin Zhu
      This paper proposes an Analytic Hierarchical Process (AHP) theory based method to determine the weight of the decision-making influence factors, considering their relative significance and generating an overall ranking for each road section. A case study on the highway network maintenance priority was conducted to illustrate the proposed procedure. A total of five pavement maintenance decision-making related factors were considered in the study, including pavement performance, pavement structure strength, traffic loads, pavement age and road grade. The weightings of the five factors were quantified through AHP method. Then, the comprehensive ranking index value Ui was determined, which indicated the maintenance priority of a road section in network level decision-making. From the aspect of maintenance cost, the sensitivity analysis results were in accordance with the weightings of different maintenance decision-making factors. The pavement maintenance cost was significantly sensitive to the change of pavement performance. The case study clearly demonstrated the applicability and rationality of the AHP theory based decision-making method and it can be used as a guideline for pavement maintenance agencies.

      PubDate: 2017-09-28T12:27:20Z
      DOI: 10.1016/j.ijprt.2017.09.015
       
  • Study on Water Permeability, Shear and Pull-Off Performance of Waterproof
           Bonding Layer for Highway Bridge

    • Authors: Meng Guo; Yiqiu Tan; Linbing Wang; Zhoujing Ye; Yue Hou; Jiangfeng Wu; Hailu Yang
      Abstract: Publication date: Available online 24 September 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Meng Guo, Yiqiu Tan, Linbing Wang, Zhoujing Ye, Yue Hou, Jiangfeng Wu, Hailu Yang
      The performance of waterproof bonding layer directly effects the durability of the highway bridge. Water permeability, shear strength and tension strength are three main indicators evaluating the waterproof bonding layer. In this research, three waterproof bonding materials including SBS modified asphalt, SBR modified asphalt emulsion and second order reaction waterproof material were selected. The water permeability, shear strength and pull-off strength were tested. The effect of different temperature and different contents were analyzed. Results show that: the water permeability resistance of waterproof bonding layer ranked as follows: SBS modified asphalt > Second order reaction waterproof material > SBR modified asphalt emulsion. Compared to SBR modified asphalt emulsion and Second order reaction waterproof material, SBS modified asphalt has a better shear resistance. Three waterproof materials used in this research all have temperature sensitivity. Their shear strength and tension strength decrease dramatically with temperature increasing.

      PubDate: 2017-09-28T12:27:20Z
      DOI: 10.1016/j.ijprt.2017.09.013
       
  • 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
       
  • Characterization of Mortar Fracture based on Three Point Bending Test and
           XFEM

    • Authors: Yucheng Huang; Yanhua Guan; Linbing Wang; Jian Zhou; Zhi Ge; Yue Hou
      Abstract: Publication date: Available online 20 September 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Yucheng Huang, Yanhua Guan, Linbing Wang, Jian Zhou, Zhi Ge, Yue Hou
      Mortar is one of the most widely used civil infrastructure materials, where the mortar fracture properties will significantly affect the structure service performance and life. In this paper, the fracture toughness of mortar specimen with respect to different thickness is investigated byconducting thethree point bending test. The Extended Finite Element Method (XFEM) is also employed to model the crack propagation and failure process in the mortar specimen. It is found that the thickness of mortar specimen will affect the mortar cracking performance and the new emerged numerical tool XFEM is able to characterize the fracture properties of mortar specimen.

      PubDate: 2017-09-21T08:07:02Z
      DOI: 10.1016/j.ijprt.2017.09.005
       
  • Study on Direct Coal Liquefaction Residue Influence on Mechanical
           Properties of Flexible Pavement

    • Authors: Jie Ji; Di Wang; Zhi Suo; Ying Xu; Shi-fa Xu
      Abstract: Publication date: Available online 20 September 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Jie Ji, Di Wang, Zhi Suo, Ying Xu, Shi-fa Xu
      To study the influence of DCLR (Direct Coal Liquefaction Residue) on mechanical properties of flexible pavement, the DCLR/compound DCLR modified asphalt mixture was prepared. The 15°C and 20°C compression resilience moduli of DCLR/compound DCLR modified asphalt mixtures were measured using the uniaxial compression test. The influences of DCLR/compound DCLR modified asphalt mixture on deflection, upper layer thickness, and bending flexural tensile stress of layer bottom were analyzed using Bisar3.0 and HPDS software. The test results show the DCLR/compound DCLR modified asphalt has higher compression resilience modulus. Due to higher resilience moduli of DCLR/compound DCLR modified asphalt mixture, they can be used as bottom layer in pavement. Under the identical loadings, the upper layer thickness can be reduced by adding DCLR and compound DCLR. If the upper layer thickness is same, the bending flexural tensile stress of layer bottom and deflection will decrease significantly.

      PubDate: 2017-09-21T08:07:02Z
      DOI: 10.1016/j.ijprt.2017.09.006
       
  • Seasonal variations and in situ assessment of concrete pavement foundation
           mechanistic properties

    • Authors: Yang Zhang; Pavana K.R. Vennapusa; David J. White; Alex E. Johnson
      Abstract: Publication date: Available online 20 September 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Yang Zhang, Pavana K.R. Vennapusa, David J. White, Alex E. Johnson
      In cold climates, pavement surface and foundation layers are subjected to seasonal temperature variation and freeze-thaw cycles. The number and duration of freeze-thaw cycles in the foundation layers can significantly influence the pavement performance. Seasonal variation in foundation layers is accounted for in pavement design by empirically adjusting the foundation layer moduli values. This paper presents results from in situ falling weight deflectometer (FWD) and dynamic cone penetrometer (DCP) tests conducted over a two-year period at five sites in Iowa; at one of these sites, temperatures of the foundation layers were continuously monitored during the testing period. FWD testing was conducted to determine the modulus of subgrade reaction (k) values. DCP testing was conducted to estimate California bearing ratio (CBR) values of the subbase and subgrade. Temperature data was analyzed to determine freezing and thawing periods and frost penetrations. Seasonal variations observed in the foundation mechanistic properties were compared with the assumed design values. Empirical relationships between the different mechanistic properties are explored.

      PubDate: 2017-09-21T08:07:02Z
      DOI: 10.1016/j.ijprt.2017.09.007
       
  • Application of piezoelectric transducer in energy harvesting in pavement

    • Authors: Xiaochen Xu; Dongwei Cao; Hailu Yang; Ming He
      Abstract: Publication date: Available online 20 September 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Xiaochen Xu, Dongwei Cao, Hailu Yang, Ming He
      Mechanical energy appears everywhere in the nature, road vibration energy created by the vehicle will not only do damage to pavement structure, but also is difficult to collect. Utilizing electromechanical conversion characteristics of piezoelectric material, gather the vibration energy when vehicle passing on the pavement, and design the piezoelectric transducer package box, for traffic lights along the roads, signs, and so on. Save the cost of laying long distance transmission line, also take full advantage of the loss of energy. Experiments of piezoelectric boxes has been conducted in pavement to prove the effectiveness of this product. This study shows that utilize piezoelectric technology in road energy harvesting is feasible and has a bright future.

      PubDate: 2017-09-21T08:07:02Z
      DOI: 10.1016/j.ijprt.2017.09.011
       
  • Using ESEM to Analyze the Microscopic Property of Basalt Fiber Reinforced
           Asphalt Concrete

    • Authors: Chunmei GAO; Weijie WU
      Abstract: Publication date: Available online 20 September 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Chunmei GAO, Weijie WU
      The basalt fiber staggered distribution in the asphalt concrete matrix and the bonding situation between asphalt are analyzed by images collected using field emission environmental scanning electron microscope (ESEM) test equipment. The results show that bonding of the fiber and the asphalt binder is very good and there is a strong binding force of chemical bonding connections between the two; the lipophilicity of basalt fiber is very good, the wrapped cover ability of asphalt for fiber is very strong; basalt fiber forms the local space network structure in the asphalt concrete matrix, effectively overcome the relative slip between the particles, connect the damaged parts into a whole; basalt fiber across internal micropores, and the internal defects in material can be remedied. At the same time, crack resistance mechanism of the fiber to internal micro cracks is qualitatively explained according to the magnitude of the stress intensity factor K f .

      PubDate: 2017-09-21T08:07:02Z
      DOI: 10.1016/j.ijprt.2017.09.010
       
  • 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
       
  • Using a modified asphalt bond strength test to investigate the properties
           

    • Authors: Taha A. Ahmed; Hosin “David” Lee; R. Christopher Williams
      Abstract: Publication date: Available online 1 September 2017
      Source:International Journal of Pavement Research and Technology
      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 0.0 mm 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: 2017-09-04T19:52:53Z
      DOI: 10.1016/j.ijprt.2017.08.004
       
  • Investigation on surface characteristics of epoxy asphalt concrete
           pavement

    • Authors: Ke Zhong; Xu Yang; Xiaohao Wei
      Abstract: Publication date: Available online 12 August 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Ke Zhong, Xu Yang, Xiaohao Wei
      The mechanical performance of epoxy asphalt concrete has been well reported in existing studies. This study investigated the surface characteristics of asphalt concrete, including the permeability, friction coefficient, moisture damage resistance and surface texture. The permeability test, dynamic friction test, Cantabro test, Hamburg test and laser texture scanning test were carried out for such investigations. Test results show that the permeability of the epoxy asphalt concrete was very low, which is desirable for protecting the steel deck. The friction coefficient can satisfy the requirement for steel deck bridge according to the Pendulum Number. However, it was found that the skid resistance could be a concern when the vehicle speed is higher than a certain level according to the dynamic friction test. The results suggested to control the traffic speed when epoxy asphalt concrete is applied as steel bridge pavement. In terms of the raveling and stripping, it was found that the epoxy asphalt mixture has an excellent anti-stripping performance based on the Cantabro test and Hamburg wheel tracking test results. The yield point was not reached after 20,000 loading cycles at 60 °C in the immersed Hamburg wheel tracking test. The mean profile depth of the epoxy asphalt concrete is 0.305mm, much lower than conventional asphalt concrete indicating a very fine surface texture.

      PubDate: 2017-09-04T19:52:53Z
      DOI: 10.1016/j.ijprt.2017.07.009
       
  • Effect of tack coat application on interlayer shear strength of asphalt
           pavement: a state-of-the-art review based on application in the United
           States

    • Authors: Weiguang Zhang
      Abstract: Publication date: Available online 23 July 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Weiguang Zhang
      The effect of tack coat application on pavement interlayer shear strength attracts strong interest during asphalt paving. Given its extensive use, tack coat is known to behave as a bond material to reduce pavement distresses such as slippage crack. The effectiveness of tack coat in increasing shear strength may be affected by multiple factors, such as tack coat material, test condition, pavement surface condition, and moisture. This article is a literature review focus on how the interlayer shear strength varied when relevant influential factors are changing. Review results indicate that the interlayer shear strength increased with the decreased test temperature, increased traffic load (within design limit), and increased test confinement pressure. Additionally, the milled pavement surface always has higher shear strength then the non-milled pavement surface. It is also found that laboratory-prepared specimens resulted in higher interlayer shear strength than field pavement cores. The effect of other factors on tack coat application may follow different trends depending on mix type and existing pavement condition. For instance, optimum tack coat rate that corresponds to peak shear strength is widely reported, while it is also found that tack coat does not greatly affect shear strength on dry, clean and milled pavement surface. Furthermore, shear strength reduced when mixture is designed with high percentage of air voids or coarse aggregate structure, such as porous asphalt and stone mastic asphalt (SMA) mixtures. More findings and recommendations can be found in this paper.

      PubDate: 2017-07-26T06:51:24Z
      DOI: 10.1016/j.ijprt.2017.07.003
       
  • Dissipated Energy Analysis of Four-Point Bending Test on Asphalt Concretes
           made with Steel Slag and RAP

    • Authors: Marco Pasetto; Nicola Baldo
      Abstract: Publication date: Available online 23 July 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Marco Pasetto, Nicola Baldo
      The paper discusses the results of an experimental study and a statistical analysis on the stiffness and the fatigue performance of recycled asphalt concretes, evaluated by the four-point bending test, at 20°C and 10 Hz. The laboratory study was conducted on five different base-binder bituminous mixtures, made with recycled aggregates, namely Reclaimed Asphalt Pavement aggregate (RAP) and Electric Arc Furnace (EAF) steel slag, up to 70% by weight of the aggregate. In order to evaluate statistically the influence of the recycled aggregates on the stiffness of the mixes, the analysis of variance (ANOVA) has been performed on the modulus data. The fatigue tests were performed in stress and strain control mode, in order to describe completely the fatigue properties of the mixes. A dissipated energy method, based on the internal damage produced within the asphalt concretes, was used for the fatigue analysis. The damage curves, expressed in terms of the Plateau Value of the Ratio of Dissipated Energy Change, for both the stress and the strain control mode, were elaborated and statistically analyzed in order to unify the fatigue analysis. Compared to the control asphalt concrete, made exclusively with natural aggregate, the mixes with RAP and EAF slag resulted characterized by improved stiffness and fatigue performance.

      PubDate: 2017-07-26T06:51:24Z
      DOI: 10.1016/j.ijprt.2017.07.004
       
  • Deterioration trends of asphalt pavement friction and roughness from
           medium-term surveys on major italian roads

    • Authors: Alberti Susanna; Maurizio Crispino; Filippo Giustozzi; Emanuele Toraldo
      Abstract: Publication date: Available online 15 July 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Alberti Susanna, Maurizio Crispino, Filippo Giustozzi, Emanuele Toraldo
      Deterioration models are the key factor for effective Pavement Management Systems, helping out road agencies to assess the actual pavement condition and forecast future performance of the asset. Among pavement condition characteristics, friction should be taken into account due to its important effect on user safety, while roughness could be used to express user comfort. The purpose of this study was to provide a reasonable case study for future improvements of Italian road management, even if the length of the analysed highways was not intended to be representative of the overall Italian network. This research studied the friction trend (Side Force Coefficient) depending on traffic levels (ESALs) and pavement aging for Italian highways, combining the data with roughness and macrotexture. Surface characteristics were monitored during a seven-year time span. A selection of different road sections with homogeneous traffic levels, similar environmental conditions and surface material was performed and high-speed/high-quality road surveys were used for distress data collection. Pavement deterioration models for Italian road sectors were developed at project level, as starting point to advance pavement management practices in Italy. Degradation curves showed the same trends for similar pavement structures, materials and traffic levels; on the other hand, differences in pavement characteristics, increased ESALs and various maintenance treatments significantly altered those trends.

      PubDate: 2017-07-19T21:35:52Z
      DOI: 10.1016/j.ijprt.2017.07.002
       
  • Sensitivity Quantification of Airport Concrete Pavement Stress Responses
           Associated with Top-Down and Bottom-Up Cracking

    • Authors: Adel Rezaei-Tarahomi; Orhan Kaya; Halil Ceylan; Kasthurirangan Gopalakrishnan; Sunghwan Kim; David R. Brill
      Abstract: Publication date: Available online 13 July 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Adel Rezaei-Tarahomi, Orhan Kaya, Halil Ceylan, Kasthurirangan Gopalakrishnan, Sunghwan Kim, David R. Brill
      The Federal Aviation Administration’s (FAA’s) rigid pavement design standard employs the NIKE3D-FAA software to compute critical pavement responses of concrete airport pavement structures. NIKE3D-FAA is a modification of the original NIKE3D three-dimensional finite element analysis program developed by the Lawrence Livermore National Laboratory (LLNL) of the U.S. Department of Energy, and is currently used in the FAA’s FAARFIELD program. This study evaluated the sensitivity of NIKE3D-FAA rigid pavement responses with respect to top-down and bottom-up cracking. The analysis was conducted by positioning a Boeing 777-300ER (B777-300ER)aircraft at different locations (interior, corner, and edge of slab) as baseline while varying other NIKE3D-FAA inputs, including rigid pavement geometric features, mechanical properties of paving and foundation materials, equivalent temperature gradient and thermal coefficient of Portland Cement Concrete (PCC) layers. Several sensitivity charts were developed by examining the sensitivity of critical pavement responses to each input variation. Sensitivity evaluations were performed using a normalized sensitivity index (NSI) as the quantitative metric. Using such sensitivity evaluation, the most significant NIKE3D-FAA input parameters for generating an effective synthetic database that will lower computational cost for future modeling developments were identified.

      PubDate: 2017-07-19T21:35:52Z
      DOI: 10.1016/j.ijprt.2017.07.001
       
  • Investigating cohesive healing of asphalt binders by means of a dissipated
           energy approach

    • Authors: Ezio Santagata; Orazio Baglieri; Davide Dalmazzo; Lucia Tsantilis
      Abstract: Publication date: Available online 15 June 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): Ezio Santagata, Orazio Baglieri, Davide Dalmazzo, Lucia Tsantilis
      The paper reports the results of an experimental investigation in which the cohesive healing properties of different types of asphalt binder were evaluated by means of the dissipated energy ratio approach. A specifically designed testing methodology was proposed which involves comparing the response of binders subjected to continuous oscillatory shear loading carried out without rest periods and with single rest periods introduced at predefined levels of damage A rheological parameter (Healing Ratio) was introduced to quantify the magnitude of healing occurring during rest time and to rank the consequent healing potential of binders. Obtained results indicate that the investigated binders did not completely recovered their original fatigue resistance after rest time, confirming the existence of some intrinsic irreversible damage, the amount of which depends on the total damage experienced before load removal. Experimental results also indicate that healing performance of binders can be significantly enhanced by polymer modification.

      PubDate: 2017-06-17T01:30:09Z
      DOI: 10.1016/j.ijprt.2017.06.004
       
  • Strength, shrinkage, erodibility and capillary flow characteristics of
           cement-treated recycled pavement materials

    • Authors: William Fedrigo; Washington Peres Núñez; Thaís Radünz Kleinert; Matheus Ferreira Matuella; Jorge Augusto Pereira Ceratti
      Abstract: Publication date: Available online 10 June 2017
      Source:International Journal of Pavement Research and Technology
      Author(s): William Fedrigo, Washington Peres Núñez, Thaís Radünz Kleinert, Matheus Ferreira Matuella, Jorge Augusto Pereira Ceratti
      Full-depth recycling with portland cement (FDR-PC) has been widely used for pavement rehabilitation; however, doubts remain regarding factors affecting some properties of the recycled material. Aiming on quantifying the effects of those factors on the strength, drying shrinkage, erodibility, capillary rise and absorption of cement-treated mixtures (CTM) of reclaimed asphalt pavement (RAP) and graded crushed stone, tests were conducted considering different RAP contents, cement contents, compaction efforts and curing times. Cement addition increased the mixtures strength and reduced their erodibility and capillary flow characteristics, but increased shrinkage. Low cement contents resulted in acceptable strength for CTM, but in high capillary rise and absorption, not being suitable if the layer is exposed to long periods of water soaking. Higher compaction effort led to similar effects as cement addition, counterbalancing low cement contents usage and reducing costs and shrinkage cracking risk. Strength and shrinkage showed higher growth rates at early stages, and then precautions should be taken in order to avoid moisture loss. Increasing RAP content decreased strength; though, RAP effect on the other properties was statistically non-significant, indicating a similar behaviour as CTM without RAP. Considering the studied properties, the mixture with most satisfactory behaviour for field applications was identified. The results highlighted strength is not the only property to be considered when designing FDR-PC mixtures; although presenting acceptable strength, some mixtures may fail due to shrinkage cracking or erosion, when exposed to water content variations.

      PubDate: 2017-06-12T20:03:47Z
      DOI: 10.1016/j.ijprt.2017.06.001
       
 
 
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