Publisher: SciELO   (Total: 912 journals)

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Showing 601 - 800 of 912 Journals sorted alphabetically
Revista Chilena de Anatomia     Open Access  
Revista Chilena de Cardiología     Open Access  
Revista Chilena de Cirugía     Open Access   (Followers: 1)
Revista Chilena de Derecho     Open Access   (Followers: 2, SJR: 0.645, CiteScore: 0)
Revista Chilena de Derecho Privado     Open Access   (Followers: 1)
Revista Chilena de Enfermedades Respiratorias     Open Access  
Revista Chilena de Infectología     Open Access   (SJR: 0.202, CiteScore: 0)
Revista Chilena de Literatura     Open Access   (Followers: 2, SJR: 0.16, CiteScore: 0)
Revista Chilena de Neuro-Psiquiatria     Open Access   (SJR: 0.137, CiteScore: 0)
Revista Chilena de Nutricion     Open Access   (Followers: 1, SJR: 0.167, CiteScore: 0)
Revista Chilena de Obstetricia y Ginecologia     Open Access   (Followers: 1, SJR: 0.139, CiteScore: 0)
Revista Chilena de Pediatria     Open Access   (Followers: 1, SJR: 0.171, CiteScore: 0)
Revista Chilena de Radiologia     Open Access   (SJR: 0.124, CiteScore: 0)
Revista Ciência Agronômica     Open Access   (SJR: 0.498, CiteScore: 1)
Revista Ciencia y Cultura     Open Access  
Revista Ciencias Técnicas Agropecuarias     Open Access  
Revista Científica Ciencia Médica     Open Access  
Revista Científica de la UCSA     Open Access  
Revista Científica General José María Córdova     Open Access  
Revista Clínica de Medicina de Familia     Open Access   (Followers: 4)
Revista Clínica de Periodoncia, Implantología y Rehabilitación Oral     Open Access   (Followers: 2)
Revista Colombiana de Anestesiología     Open Access   (Followers: 1, SJR: 0.154, CiteScore: 0)
Revista Colombiana de Antropologia     Open Access   (Followers: 2, SJR: 0.232, CiteScore: 0)
Revista Colombiana de Biotecnología     Open Access   (Followers: 1)
Revista Colombiana de Cancerología     Open Access   (SJR: 0.106, CiteScore: 0)
Revista Colombiana de Cardiologia     Open Access   (SJR: 0.113, CiteScore: 0)
Revista Colombiana de Ciencias Químico-Farmacéuticas     Open Access   (Followers: 1)
Revista Colombiana de Educación     Open Access  
Revista Colombiana de Entomología     Open Access   (Followers: 1, SJR: 0.184, CiteScore: 0)
Revista Colombiana de Estadística     Open Access   (SJR: 0.361, CiteScore: 1)
Revista Colombiana de Matemáticas     Open Access   (Followers: 1, SJR: 0.136, CiteScore: 0)
Revista Colombiana de Psicología     Open Access   (SJR: 0.151, CiteScore: 0)
Revista Colombiana de Química     Open Access   (Followers: 1, SJR: 0.115, CiteScore: 0)
Revista Contabilidade & Finanças     Open Access   (SJR: 0.145, CiteScore: 0)
Revista Costarricense de Cardiología     Open Access  
Revista Costarricense de Psicología     Open Access  
Revista Cubana de Anestesiología y Reanimación     Open Access   (Followers: 1)
Revista Cubana de Angiología y Cirugía Vascular     Open Access  
Revista Cubana de Cirugía     Open Access  
Revista Cubana de Endocrinología     Open Access  
Revista Cubana de Enfermería     Open Access   (Followers: 2, SJR: 0.102, CiteScore: 0)
Revista Cubana de Estomatologí­a     Open Access   (SJR: 0.128, CiteScore: 0)
Revista Cubana de Hematología, Inmunología y Hemoterapia     Open Access   (SJR: 0.196, CiteScore: 0)
Revista Cubana de Información en Ciencias de la Salud     Open Access   (SJR: 0.229, CiteScore: 0)
Revista Cubana de Informática Médica     Open Access  
Revista Cubana de Investigaciones Biomédicas     Open Access   (Followers: 1, SJR: 0.13, CiteScore: 0)
Revista Cubana de Medicina     Open Access   (Followers: 2)
Revista Cubana de Medicina General Integral     Open Access   (Followers: 1, SJR: 0.263, CiteScore: 0)
Revista Cubana de Medicina Militar     Open Access   (Followers: 1, SJR: 0.202, CiteScore: 0)
Revista Cubana de Medicina Tropical     Open Access   (SJR: 0.143, CiteScore: 0)
Revista Cubana de Obstetricia y Ginecología     Open Access   (SJR: 0.191, CiteScore: 0)
Revista Cubana de Oftalmología     Open Access   (Followers: 1)
Revista Cubana de Ortopedia y Traumatologí­a     Open Access   (SJR: 0.101, CiteScore: 0)
Revista Cubana de Plantas Medicinales     Open Access   (Followers: 1, SJR: 0.127, CiteScore: 0)
Revista Cubana de Salud Pública     Open Access   (SJR: 0.262, CiteScore: 0)
Revista da Educação Física : UEM     Open Access   (Followers: 1)
Revista da Escola de Enfermagem da USP     Open Access   (Followers: 2, SJR: 0.279, CiteScore: 1)
Revista da Faculdade de Educação     Open Access  
Revista da Sociedade Brasileira de Fonoaudiologia     Open Access  
Revista da Sociedade Brasileira de Medicina Tropical     Open Access   (SJR: 0.658, CiteScore: 1)
Revista de Administração - RAUSP     Open Access   (Followers: 1)
Revista de Administração Contemporânea     Open Access  
Revista de Administração de Empresas     Open Access   (Followers: 1, SJR: 0.16, CiteScore: 0)
Revista de Administração Pública     Open Access   (SJR: 0.294, CiteScore: 0)
Revista de Análisis Económico     Open Access   (SJR: 0.112, CiteScore: 0)
Revista de Antropologia     Open Access   (Followers: 4, SJR: 0.102, CiteScore: 0)
Revista de Bioética y Derecho     Open Access  
Revista de Biología Marina y Oceanografía     Open Access   (SJR: 0.23, CiteScore: 0)
Revista de Biología Tropical     Open Access   (Followers: 1, SJR: 0.326, CiteScore: 1)
Revista de Ciencia Politica     Open Access   (Followers: 2, SJR: 0.368, CiteScore: 1)
Revista de Ciencia y Tecnología     Open Access  
Revista de Ciências Agrárias     Open Access  
Revista de Ciencias Médicas de Pinar del Río     Open Access  
Revista de Ciencias Sociales     Open Access   (Followers: 1)
Revista de Cirugía     Open Access   (SJR: 0.121, CiteScore: 0)
Revista de Derecho     Open Access   (SJR: 0.364, CiteScore: 0)
Revista de Derecho (Concepción)     Open Access   (Followers: 2)
Revista de Derecho (Coquimbo)     Open Access  
Revista de Economía     Open Access   (Followers: 1)
Revista de Economia Contemporânea     Open Access   (SJR: 0.121, CiteScore: 0)
Revista de Economía del Caribe     Open Access  
Revista de Economia e Sociologia Rural     Open Access   (Followers: 2, SJR: 0.265, CiteScore: 0)
Revista de Economía Institucional     Open Access   (SJR: 0.141, CiteScore: 0)
Revista de Economia Poli­tíca     Open Access   (Followers: 1, SJR: 0.282, CiteScore: 0)
Revista de Enfermagem Referência     Open Access   (Followers: 2)
Revista de Estudios Historico-Juridicos     Open Access   (Followers: 1, SJR: 0.123, CiteScore: 0)
Revista de Estudios Sociales     Open Access   (Followers: 2, SJR: 0.166, CiteScore: 0)
Revista de Filosofia     Open Access   (SJR: 0.102, CiteScore: 0)
Revista de Filosofía Open Insight     Open Access  
Revista de Geografía Norte Grande     Open Access   (Followers: 1, SJR: 0.296, CiteScore: 1)
Revista de Gestão Costeira Integrada     Open Access   (SJR: 0.251, CiteScore: 1)
Revista de Historia (Concepción)     Open Access   (Followers: 1)
Revista de Historia Americana y Argentina     Open Access  
Revista de Historia del Derecho     Open Access   (Followers: 1)
Revista de Ingeniería     Open Access  
Revista de Investigacion Psicologica     Open Access  
Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales     Open Access   (Followers: 1)
Revista de la Asociación Española de Neuropsiquiatría     Open Access  
Revista de la Ciencia del Suelo y Nutricion Vegetal     Open Access   (SJR: 0.224, CiteScore: 0)
Revista de la Construcción     Open Access   (SJR: 0.234, CiteScore: 1)
Revista de la Facultad de Agronomía     Open Access   (Followers: 2)
Revista de la Facultad de Derecho : Universidad de la República     Open Access  
Revista de la Facultad de Derecho y Ciencias Políticas     Open Access  
Revista de la Facultad de Medicina (México)     Open Access   (Followers: 1)
Revista de la Sociedad Boliviana de Pediatría     Open Access  
Revista de la Sociedad Española de Enfermería Nefrológica     Open Access  
Revista de la Sociedad Química del Perú     Open Access   (Followers: 1)
Revista de la Sociedad Venezolana de Microbiologia     Open Access  
Revista de la Universidad Industrial de Santander. Salud     Open Access  
Revista de Medicina Veterinaria     Open Access  
Revista de Microbiologia     Open Access   (Followers: 1)
Revista de Nutrição     Open Access   (SJR: 0.282, CiteScore: 0)
Revista de Odontologia da UNESP     Open Access  
Revista de Odontologia da Universidade de São Paulo     Open Access  
Revista de Osteoporosis y Metabolismo Mineral     Open Access   (Followers: 2, SJR: 0.121, CiteScore: 0)
Revista de Otorrinolaringología y Cirugía de Cabeza y Cuello     Open Access  
Revista de Protección Vegetal     Open Access  
Revista de Psicología del Trabajo y de las Organizaciones     Open Access   (SJR: 0.418, CiteScore: 1)
Revista de Psiquiatria Clínica     Open Access   (Followers: 1, SJR: 0.271, CiteScore: 1)
Revista de Psiquiatria do Rio Grande do Sul     Open Access   (Followers: 1)
Revista de Salud Animal     Open Access  
Revista de Salud Pública     Open Access   (Followers: 1, SJR: 0.171, CiteScore: 0)
Revista de Saúde Pública     Open Access   (Followers: 1, SJR: 0.807, CiteScore: 2)
Revista de Sociologia e Polí­tica     Open Access   (Followers: 2, SJR: 0.482, CiteScore: 0)
Revista del Instituto de Medicina Tropical     Open Access  
Revista del Nacional     Open Access   (Followers: 1)
Revista Dental Press de Ortodontia e Ortopedia Facial     Open Access   (Followers: 1)
Revista Diacrítica     Open Access  
Revista Direito GV     Open Access   (Followers: 1)
Revista do Colégio Brasileiro de Cirurgiões     Open Access   (SJR: 0.221, CiteScore: 1)
Revista do Departamento de Psicologia. UFF     Open Access  
Revista do Hospital das Clinicas     Open Access  
Revista do Instituto de Estudos Brasileiros     Open Access   (Followers: 1)
Revista do Instituto de Medicina Tropical de São Paulo     Open Access   (SJR: 0.669, CiteScore: 1)
Revista Dor     Open Access  
Revista Ecuatoriana de Neurología     Open Access   (Followers: 1)
Revista EIA     Open Access   (Followers: 1)
Revista electrónica de investigación educativa     Open Access   (Followers: 1, SJR: 0.187, CiteScore: 0)
Revista Electronica Educare     Open Access   (Followers: 2)
Revista Española de Cirugía Oral y Maxilofacial     Open Access   (Followers: 1, SJR: 0.117, CiteScore: 0)
Revista Española de Enfermedades Digestivas     Open Access   (SJR: 0.417, CiteScore: 1)
Revista Española de Salud Pública     Open Access   (SJR: 0.249, CiteScore: 1)
Revista Española de Sanidad Penitenciaria     Open Access   (SJR: 0.135, CiteScore: 0)
Revista Estudos Feministas     Open Access   (SJR: 0.208, CiteScore: 0)
Revista Facultad de Ciencias Económicas: Investigación y Reflexión     Open Access  
Revista Facultad de Ingenieria - Universidad de Tarapaca     Open Access   (Followers: 1)
Revista Facultad de Ingeniería Universidad de Antioquia     Open Access   (Followers: 1, SJR: 0.172, CiteScore: 0)
Revista Facultad de Medicina de la Universidad Nacional de Colombia     Open Access   (SJR: 0.125, CiteScore: 0)
Revista Facultad Nacional de Agronomía, Medellín     Open Access   (SJR: 0.138, CiteScore: 0)
Revista Facultad Nacional de Salud Pública     Open Access  
Revista Gaúcha de Enfermagem     Open Access   (SJR: 0.225, CiteScore: 1)
Revista Geológica de América Central     Open Access  
Revista Geológica de Chile     Open Access   (Followers: 1)
Revista Gerencia y Políticas de Salud     Open Access   (SJR: 0.136, CiteScore: 0)
Revista Habanera de Ciencias Médicas     Open Access   (SJR: 0.211, CiteScore: 0)
Revista Historia y Sociedad     Open Access  
Revista IBRACON de Estruturas e Materiais     Open Access   (Followers: 1)
Revista Ingeniería Biomédica     Open Access   (Followers: 1)
Revista Ingenieria de Construcción     Open Access   (Followers: 1, SJR: 0.204, CiteScore: 0)
Revista Ingenierías Universidad de Medellín     Open Access  
Revista Integra Educativa     Open Access  
Revista Interamericana de Bibliotecología     Open Access   (Followers: 7)
Revista Internacional de Contaminación Ambiental     Open Access   (SJR: 0.152, CiteScore: 0)
Revista ION     Open Access  
Revista IUS     Open Access  
Revista Katálysis     Open Access  
Revista Lasallista de Investigación     Open Access   (SJR: 0.146, CiteScore: 0)
Revista Latino-Americana de Enfermagem     Open Access   (SJR: 0.339, CiteScore: 1)
Revista Latinoamericana de Bioética     Open Access  
Revista Latinoamericana de Ciencias Sociales, Niñez y Juventud     Open Access   (Followers: 1)
Revista Latinoamericana de Derecho Social     Open Access   (Followers: 1, SJR: 0.101, CiteScore: 0)
Revista Latinoamericana de Desarrollo Económico     Open Access  
Revista Latinoamericana de Educación Inclusiva     Open Access   (Followers: 1)
Revista Latinoamericana de Filosofía     Open Access   (Followers: 1)
Revista Latinoamericana de Hipertension     Open Access   (SJR: 0.158, CiteScore: 0)
Revista Latinoamericana de Investigación en Matemática Educativa     Open Access   (SJR: 0.171, CiteScore: 0)
Revista Latinoamericana de Psicopatologia Fundamental     Open Access   (SJR: 0.201, CiteScore: 0)
Revista Medica de Chile     Open Access   (SJR: 0.259, CiteScore: 1)
Revista Médica del Hospital Nacional de Niños Dr. Carlos Sáenz Herrera     Open Access   (Followers: 1)
Revista Médica del Uruguay     Open Access  
Revista Médica Electrónica     Open Access  
Revista Médica La Paz     Open Access  
Revista Médico-Científica : Luz y Vida     Open Access  
Revista Mexicana de Análisis de la Conducta     Open Access   (SJR: 0.405, CiteScore: 1)
Revista Mexicana de Astronomía y Astrofísica     Open Access   (Followers: 2, SJR: 0.596, CiteScore: 1)
Revista Mexicana de Biodiversidad     Open Access   (SJR: 0.421, CiteScore: 1)
Revista Mexicana de Ciencias Agrícolas     Open Access   (Followers: 1)
Revista Mexicana de Ciencias Farmaceuticas     Open Access   (Followers: 1)
Revista Mexicana de Ciencias Geológicas     Open Access   (SJR: 0.308, CiteScore: 1)
Revista Mexicana de Ciencias Pecuarias     Open Access   (Followers: 1, SJR: 0.17, CiteScore: 0)
Revista Mexicana de Economía y Finanzas     Open Access  
Revista Mexicana de Física     Open Access   (SJR: 0.203, CiteScore: 0)
Revista mexicana de física E     Open Access  
Revista Mexicana de Fitopatología     Open Access  
Revista Mexicana de Ingeniería Biomédica     Open Access   (Followers: 1)
Revista Mexicana de Ingeniería Química     Open Access   (SJR: 0.328, CiteScore: 1)
Revista Mexicana de Investigación Educativa     Open Access   (Followers: 3, SJR: 0.291, CiteScore: 0)
Revista Mexicana de Micologí­a     Open Access  
Revista Mexicana de Sociologí­a     Open Access   (Followers: 9, SJR: 0.142, CiteScore: 0)
Revista Musical Chilena     Open Access   (SJR: 0.1, CiteScore: 0)

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Revista de la Construcción
Journal Prestige (SJR): 0.234
Citation Impact (citeScore): 1
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 0717-7925 - ISSN (Online) 0718-915X
Published by SciELO Homepage  [912 journals]
  • Evaluation of typical wma additives on design parameters of SMA mixtures

    • Abstract: Abstract Warm Mix Asphalt (WMA) technologies have made a considerable development in recent years, where studies on environmental pollution and protection of natural resources have become prominent all over the world. Thanks to the rapidly developing and renewed WMA technologies, non-renewable resources can be saved while environmental effects caused by asphalt production can be reduced. In recent years, WMA technologies have begun to gain importance in the production of Hot Mix Asphalt (HMA), particularly in developing countries where energy supplying is quite expensive for economic reasons. In this study, Stone Mastic Asphalt (SMA) was produced by using pure and modified bitumen with three different WMA admixtures. Marshall tests were carried out to examine the design parameters of these samples. As a result, Marshall Design parameters of Warm Mix Stone Mastic Asphalt (WM-SMA) blends have been produced with WMA additives by decreasing the construction temperature. The resulting mixtures fall within specification criteria.
  • Impact analysis of geotechnical occurrences in ECP projects cost control

    • Abstract: Abstract Engineering, procurement, and construction (EPC) contracts are the most widespread way to carry out the execution of complex projects. Under an EPC contract modality, the contractor must must complete the installation at a guaranteed price and by a specific date, while reaching the agreed level of quality and performance for the installation. Failure to comply with any of the above requirements usually results in the application of economic penalties. Therefore, the main problem of a fixed price EPC contract is that any unexpected problem will be reflected in the final economic result of the contract. There are three main problems that can endanger the final result: a) Unexpected failure that does not represent a time delay but involves the rehabilitation costs; b) Unexpected failure that endangers the facility delivery date and therefore involves a penalty fee; c) Erroneous selection of the involved regulations in the design of the project. Since the exposed problems are quite common, the aim of this paper is to give an approach, in economic terms, of the unexpected costs related to geotechnical issues. This analysis will be carried out using three real EPC construction projects. The selected examples will cover different perspectives: Case 1; the main cost is the execution of the rehabilitation. Case 2; the main cost is the penalty fee due to start up delay. Case 3; the cost depends on the applicable regulations.
  • New design parameters for biparabolic beach profiles (SW Cadiz, Spain)

    • Abstract: Abstract 165 profiles of seventy-one beaches along the Gulf of Cadiz (SW, Spain) were studied to improve the formulation of the beach profile in tidal seas. Maritime climate, degree of energy exposure and size of the sand grains were taken into account to study the two sections of the biparabolic profile. The objective of the study was the determination of more accurate formulations of the design parameters for the equilibrium profile that involves tidal seas. These formulations were modelled and validated based on existing profiles to quantify the error existing between the real profile and the modelling. This comparative analysis was extended by considering the formulations proposed by other authors. The best results were obtained with the proposal presented herein.
  • Optimizing contractor’s selection and bid evaluation process in
           construction industry: Client’s perspective

    • Abstract: Abstract Construction in developing countries is often encountered with multifarious challenges including contractor’s performance due to lack of qualification and resources. The lowest bid criterion is binding in public procurements. However, contractors exploit the loopholes in the bid process management system. This paper scrutinizes the prevalent rules for the bid evaluation and investigates the criterion used by both clients and consultants in selecting the contractors during the bids evaluation phase of construction projects in Pakistan. The current research uses the relative importance index and severity index approach to analyze the data. It was discovered that proper planning, credit worthiness, transition plans, plant and equipment holding, financial stability, past performance, and quality, are the most imperative factors, influencing the contractor’s selection procedures used by clients and consultants. Likewise, a high probability of success is presaged if the contractors are selected using the multi-criteria method. The study contributes to the body of knowledge by revealing the significant factors impacting the contractor’s selection and bid evaluation process, especially in a developing country. Its results and methodology can also be generalized with caution in other developing countries having similar work environment.
  • Seismic performance of an existing low-rise RC building considering the
           addition of a new storey

    • Abstract: Abstract In low-rise reinforced concrete (RC) buildings, structural design is generally performed considering the seismic effects as well as the vertical loads. However, there may be situations where the additional or unpredicted loads may be encountered during the service life of the buildings. The loads that are governed from a new storey addition during the service life is a good example for these additional loads. Since the reconstruction permits and building height limits specified by the authorities may vary in life-cycle of the structures, it is critical to decide the addition of a storey to an existing building considering the structural safety concerns. In this study, an existing low-rise RC building is modelled with an added storey (subsequently planned for construction), and numerical analyses are carried out considering the extra loads of this additional storey. The aim is to evaluate the seismic performance of the structure considering this unpredicted situation which was not taken into account in the original structural design. The suitability of the preliminary structural design project to the existing building was checked by the site investigations. The results of the numerical analysis were compared with the seismic code requirements, and the seismic performance level of the building is determined. The study is intended to be useful in determining the path to be followed for the determination of the seismic capacity if existing buildings are subjected to additional loads.
  • Experimental study on the interfacial behavior of normal and lightweight

    • Abstract: Abstract The interface between aggregate and mortar or paste is a weak phase. This has a serious effect on the properties of concretes. Because of the high porosity of lightweight aggregate, the interface of lightweight concrete is different from that of normal weight concrete. In this study, the effect of interfacial interactions between lightweight aggregate and mortar on the mechanical and chloride ion transport properties of concretes was investigated. The test variables were the volume fraction of the lightweight aggregate and the water-cement (W/C) ratio. The elastic modulus, the electrical charge passed from the rapid chloride penetration test (RCPT), and chloride ion penetration depth were determined. In addition, scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) were used to observe the microstructures of the interfaces. SEM observation of the lightweight concrete revealed that the interface bonding between mortar and aggregate is considerably firmer than that of normal weight concrete. However, test results indicate that the ability of the lightweight concrete to resist chloride ion intrusion is worse than that of normal weight concrete. Comparison with theoretical models reveals that a negative factor affects the chloride ion transmission in lightweight concrete. As the volume fraction of lightweight aggregate increased, this negative influence is also increased. Chloride ions were detected both in the mortar and the lightweight aggregate in the EDX test. This indicates that chloride ions passed through the lightweight aggregate during the RCPT and can thus influence chloride ion transmission throughout lightweight concrete.
  • Thermal modification of most representative Portuguese wood species. A
           preliminary study

    • Abstract: Abstract The thermal modification has proved to be an effective method to improve the durability of wood elements. Until now, most applications of thermally modified wood have been limited to non-structural applications since the wood’s heat treatment leads to a significant reduction in mechanical performances. However, there is no knowledge about these treatments applied on the wood species more used in Portuguese constructions. In order to evaluate the effect of heat treatment on the wood species of Maritime pine (Pinus pinaster), Eucalyptus (Eucalyptus globulus), Beech (Fagus sylvatica), Acacia (Acacia melanoxylon) and Oak (Quercus faginea), an experimental program consisted of mechanical bending tests and dimensional stability tests (shrinkage, swelling and equilibrium moisture content) was defined. For comparison purposes, all tests were made with test specimens of non-modified and thermally modified wood using four temperature values (200ºC, 240ºC, 260ºC and 300ºC) and three exposed periods (2, 4 and 8 hours). The obtained results show that the behaviour of the studied experimented species was similar to the one of other species already studied in the available literature. It was possible to point out that mechanical properties decrease with the severity of the thermal treatment, while the dimensional stability improved.
  • Mechanical properties of self-compacting concrete with recycled bead wires

    • Abstract: Abstract This paper investigates the properties of self-compacting concrete with waste steel bead wires obtained as a result of the separation of waste tires. Waste steel bead wires were added to concrete between 1% and 5% by weight with an increment of 1%. In total, 54 cubes, 6 cylinders and 6 beams were cast, cured and tested in according to various standards to obtain the compressive, splitting tensile and flexural strengths, respectively. In addition, 6 cubes were left in salty water solution with a salt concentration of 4% for 120 days and tested in compression. A scanning electron microscopy (SEM) was also conducted on samples after failure. Test results showed that short time corrosion of steel fibers does not affect the mechanical properties. Also, the increase in the ratio of steel fiber was found to contribute positively to the mechanical properties of concrete up to 4%, beyond which, mechanical properties were reduced. Finally, in the samples subjected to bending tests, it has been found that a 6-fold increase in bending strength compared to the reference (non-fiber) sample was achieved in case of steel fiber ratio of 4% and 5%.
  • Profile of the health and safety coordinator in civil engineering works:
           the Spanish case

    • Abstract: Abstract The profile and function of the health and safety coordinator in civil engineering works has till now received insufficient attention. This paper first analyzed all public contracts between 2008 to 2016 in Spain related to health and safety. We then proceeded to assess a case study of a company focused on health and safety coordination in the period 2012 to 2015 and the results of a survey of the views of different stakeholders. We then used the knowledge acquired, objective results, and lessons learned to develop recommendations related to the profile, main functions, and best practices for the performance of health and safety coordination.
  • Zero cost conditioning techniques to improve the indoor environment of
           school buildings

    • Abstract: Abstract In order to reduce the use of energy in buildings, it is necessary to make changes in the society paradigm, not only changes in the way buildings use energy. It seems appropriate to analyse the savings that can be obtained by simple actions related to the implementation of good practices for passive conditioning, for which no economic investment are required. As a zero-investment action, the possibility of moving the school schedule to the period of the day in which the exterior temperature is lower needs to use energy to maintain the comfort condition inside the building is analyzed. Simulations of nine activities about moving school schedules and close the shutters in a teaching centre building located on the Spanish climatic zone D3 are carried out. The percentage of savings when the teaching centre imparts classes from 14:00 to 21:00 during October to May and from 7:00 to 14:00 during September closes the shutters in the summer period and in winter evenings is the 50%. The €6,120 of savings that are obtained annually with this activity could be an interesting economic injection that allows to undertake future investments in the school, and with it achieving the objectives sought with circular economy.
  • Flexural behavior of fiber reinforced lightweight concrete

    • Abstract: Abstract In this research the flexural behavior of lightweight aggregate concrete with inclusion of steel and glass fiber was investigated. Pumice aggregate was used for the replacement of normal weight aggregate to reduce the density of concrete in order to achieve lightweight concrete. The methodology consisted of comparing the results of conventional reference concrete, plain. Light Weight Aggregate Concrete (LWAC) and fiber reinforced LWAC. The beams were produced with two types of fiber reinforced LWAC, plain LWAC and conventional concrete with similar compressive strength to allow for the comparison of structural performance of the beam. The fibers were added in the LWAC to reduce the brittleness of the concrete in order to increase the energy absorption capacity and to control the faster rate of crack development. In this research steel and glass fibers were added separately in three percentages of 0.5, 1.0 and 1.5 based on the weight of concrete. The hybrid combinations of steel and glass fibers were not adopted in this study. The beam specimen with 20% LWA and 0.5% steel fiber has the increase in load carrying capacity by 28% as compared to control beam.The ductility ratio of the same beam is 85% more than that of control specimen.
  • Study of chloride penetration profiles and surface chloride content of
           concrete structures exposed to marine environment evaluated at different
           exposure times

    • Abstract: Abstract Nowadays, some studies have shown the increasing chloride content of concrete surface (Cs) exposed to marine environments over time. To evaluate this behavior, a comparative analysis was conducted between the chloride profiles in tetrapods located in southern Brazil, obtained from samples extracted at 5 and 9.5 years from four microenvironments To this end, the equation of Fick's second lawconsiders the time-dependent Cs variation, a model was prepared for each exposure time profile measured from each microenvironment, which considered the Cs variation since it increased significantly from 5 to 9.5 years. The models obtained from the profiles measured at 5 years were used to estimate the profile at the exposure time of 9.5 years and then compared with the real profiles measured at 9.5 years. The same procedure was used for the profiles measured at 9.5 years, that is to say, a 5-year profile was estimated and compared with a profile measured at the same exposure time. This shows the efficiency of the model. According to the research results, profiles of about 5 years are still too premature to be used as an estimate of the residual useful life of a structure, even considering the Cs variation. However, profiles of approximately ten years can be used, and their Cs values may increase. Therefore, research of the Cs values must continue to obtain the corresponding older chloride profiles to assess the behavior of the curves and the efficiency of the suggested model.
  • Time-cost optimization model proposal for construction projects with
           genetic algorithm and fuzzy logic approach

    • Abstract: Abstract Considering the construction industry holds ten percent on average in the gross national product over the world, the importance of efficient use of resources emerges. To alleviate the possibility of the risk factors and various uncertainties' negative impact on the project, the usage of the scheduling tools should be supported for planning as well as risk management. In today's construction perspective, the quality is not a primary objective; construction projects have to be completed within the cost and duration limits. During the construction progress, the inserting of extra activities affects to construction delays. Project success; from the planning stage to the completion of the building, it is possible to plan the resources, use them efficiently, and realize the determined time and cost objectives. In this study, a model is developed by using a fuzzy logic approach and genetic algorithm in order to provide time-cost optimization in construction projects under uncertainties. Firstly, fuzzy sets are used to take into account the effects of time and cost uncertainties on construction works. Fuzzy sets are used to model uncertainties, and the genetic algorithm is used to acquire minimum Project cost and duration. Thus, by establishing a fuzzy time-cost optimization model, optimum time-cost results are obtained according to different risk levels determined by the decision-makers. At the final stage, Pareto fronts from different risk levels that contain both minimum costs and durations are obtained and plotted.
  • Allocation of bridge maintenance costs based on prioritization indexes

    • Abstract: Abstract Prioritization indexes (PI) are a need-based bridge maintenance approach, which allows making short-term maintenance decisions. They generally use just the bridge condition as an explanatory variable, therefore, prioritizing is easy to do. When these indexes are multidimensional, prioritization depends not just on the bridge conditions, but also on variables such as vulnerability and their strategic importance. This paper discusses a simple and direct procedure to allocate bridge maintenance costs by using a PI based on the bridge condition, their strategic importance and vulnerability. The procedure combines maintenance activities within the strategies of routine and preventive maintenance, repair, reinforcement, reconstruction or replacement. It includes the calculation of maintenance costs by maintenance activity and strategy, in order to integrate them in a cost matrix. The procedure is applied to a 24-m long bridge, whose infrastructure is made of concrete, steel beams and concrete deck. Unit costs of 60 maintenance activities were calculated, and a sensitivity analysis was carried out to establish the cost by linear meter in relation to PI explanatory variables. The cost was sensitive to bridge condition, their vulnerability, and relevance within the road network.
  • Finite element analysis of cast-in-situ RC frame corner joints under
           quasi-static and cyclic loading

    • Abstract: Abstract Many types of computer software are currently available for the numerical modeling of monolithic RC structures; however, the accuracy of the numerical models created with the programs can only be acceptable by using a well-developed modeling method. We present the behavior of monolithic RC frame corners and beam to column joints for quasi-static and cyclic lateral loads, using numerical models created by our modeling method. Several laboratory experiments have already been carried out to investigate the failure of the joints and the behavior of these unique connections. In this paper, we made three-dimensional nonlinear FE body models with different reinforcement shapes, based on actual laboratory tests. We present the behavior of the joints in case of monotonic increasing quasi-static and cyclic changing loads. The results of laboratory experiments found in the literature and finite element calculations are compared and the conclusions that can be drawn from them are summarized within this article.
  • Analysis of the resistance to fire of solid concrete boards with
           polypropylene microfibers and long curing time

    • Abstract: Abstract Reinforced concrete elements with long curing ages tend not to present spalling when subjected to high temperatures since heat transfer in concrete is influenced mostly by the materials constituting its composition. Polypropylene microfiber-reinforced concrete presents more porosity and higher thermal insulation as the fibers melt when exposed to high temperatures. Therefore, this study aimed to assess the influence of the addition of polypropylene microfibers on the resistance to fire of reinforced concrete boards. The mechanical tests required crafting 18 boards and 3 walls in real scale, which measured 3.15x3.00 m. The analysis comprised 3 types of systems, being the reference reinforced concrete and the concretes with polypropylene microfiber ratios of 0.97 kg/m³ and 1.94 kg/m³. Were extract 18 specimens for the axial compression test. The fire test was performed in a vertical furnace under the ISO 834 curve. None of the 3 walls displayed spalling and the boards with higher microfiber ratios presented better fire performance, with smaller maximum displacements. The wall with 1.94 kg/m³ microfiber ratio obtained a gain of 23.5 min in thermal insulation compared to the reference reinforced concrete wall. It was also perceived that the incorporation of polypropylene microfibers in the concrete reduces its compressive strength.
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Tel: +00 44 (0)131 4513762

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