This study is focused on the prediction of the asphalt binder complex modulus at various temperatures and various loading frequencies. The master curve approach was used to predict the asphalt binder behavior for a wide range of temperatures and loading frequencies by applying the time-temperature superposition principle for pressure ageing vessel (PAV) aged asphalt binder mixed with different percentages of sasobit asphalt modifier. The complex modulus was measured using the dynamic shear rheometer (DSR) with a wide range of loading frequencies (0.1 Hz-10 Hz) and a wide range of testing temperatures (16 C-31 C). The results showed an increase in the complex modulus with increasing the loading frequency as well as with increasing the sasobit percentage. However, the results showed a decrease in the complex modulus with increasing the testing temperature. The use of the master curve approach showed a high degree of accuracy in predicting the complex modulus for the asphalt binder.
{"title":"Predicting the Complex Modulus for PAV Aged Asphalt Binder Using a Master Curve Approach for Sasobit Modified Asphalt Binder","authors":"Khalid A. Ghuzlan, M. A. Assi","doi":"10.14525/JJCE.10.3.3610","DOIUrl":"https://doi.org/10.14525/JJCE.10.3.3610","url":null,"abstract":"This study is focused on the prediction of the asphalt binder complex modulus at various temperatures and various loading frequencies. The master curve approach was used to predict the asphalt binder behavior for a wide range of temperatures and loading frequencies by applying the time-temperature superposition principle for pressure ageing vessel (PAV) aged asphalt binder mixed with different percentages of sasobit asphalt modifier. The complex modulus was measured using the dynamic shear rheometer (DSR) with a wide range of loading frequencies (0.1 Hz-10 Hz) and a wide range of testing temperatures (16 C-31 C). The results showed an increase in the complex modulus with increasing the loading frequency as well as with increasing the sasobit percentage. However, the results showed a decrease in the complex modulus with increasing the testing temperature. The use of the master curve approach showed a high degree of accuracy in predicting the complex modulus for the asphalt binder.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66631764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Every project confronts risk both in financial and technical dimensions. This induces a greater response on the performance of the project. A successful construction project depends on how the project participants compute the actual project performance. A commendable assessment of project performance practice determines the project productivity both quantitatively and qualitatively. Methods of project performance measurement vary among industries. As a contribution to the above, this study equips the project manager with a proficient mode of project performance measurement and the essential promising decisions that head to profit maximization. This intricate study thus facilitates the project manager to compute the project performance on the basis of the effects of Earned Value Management (EVM) indices which are broadly classified as: variance indices, performance indices and miscellaneous or forecast indices. Adopting the Analytical Network Process (ANP) structure model in Super Decision software is a reliable decision making tool. This study indicates that the cost variance (CV) index is prominent among the EVM indices that highly affect the project characteristics, the measurement of which facilitates the required control measures on respective project activities. It also indicates that cost is the major project characteristic, the variation of which immensely affects the project performance. It procures an objective reference for engineering projects by following the selection process of best EVM indices that holds an accurate measure of project performance.
{"title":"Application of Earned Value Management to Compute the Project Performance Using Analytical Network Process","authors":"S. Ramani, N. Sruthi","doi":"10.14525/JJCE.10.1.3541","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3541","url":null,"abstract":"Every project confronts risk both in financial and technical dimensions. This induces a greater response on the performance of the project. A successful construction project depends on how the project participants compute the actual project performance. A commendable assessment of project performance practice determines the project productivity both quantitatively and qualitatively. Methods of project performance measurement vary among industries. As a contribution to the above, this study equips the project manager with a proficient mode of project performance measurement and the essential promising decisions that head to profit maximization. This intricate study thus facilitates the project manager to compute the project performance on the basis of the effects of Earned Value Management (EVM) indices which are broadly classified as: variance indices, performance indices and miscellaneous or forecast indices. Adopting the Analytical Network Process (ANP) structure model in Super Decision software is a reliable decision making tool. This study indicates that the cost variance (CV) index is prominent among the EVM indices that highly affect the project characteristics, the measurement of which facilitates the required control measures on respective project activities. It also indicates that cost is the major project characteristic, the variation of which immensely affects the project performance. It procures an objective reference for engineering projects by following the selection process of best EVM indices that holds an accurate measure of project performance.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66631668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A large number of studies, experiments and practical test projects have been undertaken throughout the world to assess the modifications in the properties of concrete after addition of rubber aggregates. These rubber aggregates are used to replace fine or coarse aggregates in various proportions. This experimental investigation attempts to study the strength properties and non-destructive evaluation of rubberized concrete with coarse aggregates being partially replaced with rubber aggregates from recycled tyres, in order to assess its suitability for use in structural and non-structural components. Effort was also made to determine the change in thermal properties. It was learnt that the inclusion of rubber in concrete makes the material a better thermal insulator, having a lower coefficient of thermal conductivity. This lower thermal conductivity is a property which could be very useful for meeting energy conservation requirements. Attempt was also made to assess the impact resistance of rubberized concrete. A marked improvement in this property was also observed.
{"title":"Thermal Conductivity and Impact Resistance of Concrete Using Partial Replacement of Coarse Aggregate with Rubber","authors":"Venu Malagavelli, R. S. Parmar, P. N. Rao","doi":"10.14525/JJCE.10.2.3533","DOIUrl":"https://doi.org/10.14525/JJCE.10.2.3533","url":null,"abstract":"A large number of studies, experiments and practical test projects have been undertaken throughout the world to assess the modifications in the properties of concrete after addition of rubber aggregates. These rubber aggregates are used to replace fine or coarse aggregates in various proportions. This experimental investigation attempts to study the strength properties and non-destructive evaluation of rubberized concrete with coarse aggregates being partially replaced with rubber aggregates from recycled tyres, in order to assess its suitability for use in structural and non-structural components. Effort was also made to determine the change in thermal properties. It was learnt that the inclusion of rubber in concrete makes the material a better thermal insulator, having a lower coefficient of thermal conductivity. This lower thermal conductivity is a property which could be very useful for meeting energy conservation requirements. Attempt was also made to assess the impact resistance of rubberized concrete. A marked improvement in this property was also observed.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66631407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study has been conducted to study rework in residential building projects in the West Bank in Palestine. It investigates the cost and causes of rework. A questionnaire survey of 86 contractors from the West Bank in Palestine was performed. 43 rework causes were identified during the research. The study investigates the average of rework cost and the severity of the identified rework causes. 62% of the contractors indicated that the average of rework cost in residential building construction projects that they have experienced during the last five years ranged between 10% and 15% of the original contract cost, which means that rework in residential projects is a severe problem, which should be studied more intensively to be solved in the future. The questionnaire survey also concluded that the most severe causes of rework in residential building projects as identified by the contractors are: poor communication of the client with the consultant, poor communication of the client with the contractor, use of poor quality materials, poor site management and poor communication of the client with the design consultant.
{"title":"Analysis of Rework in Residential Building Projects in Palestine","authors":"I. Mahamid","doi":"10.14525/JJCE.10.1.3536","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3536","url":null,"abstract":"This study has been conducted to study rework in residential building projects in the West Bank in Palestine. It investigates the cost and causes of rework. A questionnaire survey of 86 contractors from the West Bank in Palestine was performed. 43 rework causes were identified during the research. The study investigates the average of rework cost and the severity of the identified rework causes. 62% of the contractors indicated that the average of rework cost in residential building construction projects that they have experienced during the last five years ranged between 10% and 15% of the original contract cost, which means that rework in residential projects is a severe problem, which should be studied more intensively to be solved in the future. The questionnaire survey also concluded that the most severe causes of rework in residential building projects as identified by the contractors are: poor communication of the client with the consultant, poor communication of the client with the contractor, use of poor quality materials, poor site management and poor communication of the client with the design consultant.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66631201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, Finite Element Model (FEM) updating based on a new heuristic algorithmis proposed for damage identification in truss structures. This method updates the dynamic properties of the damaged and undamaged state of a structure to identify the presence, location and magnitude of the damage in structural members. Imperialist Competitive Algorithm (ICA), which is one of the most efficient heuristic methods, is used to minimize the objective function which is based on dynamic properties of the structure. Damage in structures is caused by the reduction in stiffness of specific members, especially in Young's modulus. The capability and efficiency of this method to identify damage using frequencies and mode shapes are demonstrated by means of several numerical examples. Results show the superiority and effectiveness of the proposed method.
{"title":"Damage Identification in Truss Structures Using Finite Element Model Updating and Imperialist Competitive Algorithm","authors":"H. Ghaffarzadeh, F. Raeisi","doi":"10.14525/JJCE.10.1.3542","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3542","url":null,"abstract":"In this paper, Finite Element Model (FEM) updating based on a new heuristic algorithmis proposed for damage identification in truss structures. This method updates the dynamic properties of the damaged and undamaged state of a structure to identify the presence, location and magnitude of the damage in structural members. Imperialist Competitive Algorithm (ICA), which is one of the most efficient heuristic methods, is used to minimize the objective function which is based on dynamic properties of the structure. Damage in structures is caused by the reduction in stiffness of specific members, especially in Young's modulus. The capability and efficiency of this method to identify damage using frequencies and mode shapes are demonstrated by means of several numerical examples. Results show the superiority and effectiveness of the proposed method.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66631822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Double loaded corridors in educational buildings generally experience a low daylight level, as they do not have enough direct contact with the outdoor environment. The task light level in those corridors is lower than that in reading or office spaces. Double loaded corridors normally depend on artificial light. On the other hand, double loaded corridors need to be lit all the day during the occupation period as one can not specify when different users could use it. This research explores the possibility of using tubular light systems in addition to some architectural solutions to provide double loaded corridors with the required daylight. The research used anidolic, light pipe and ceiling cavity systems in addition to high windows from side offices to improve daylighting in double loaded corridors. The experimental study, which has taken place at JUST, showed that anidolic systems could provide double loaded corridors with sufficient lighting levels. On the other hand, radiance simulations showed that anidolic and some other solution systems can provide corridors with sufficient daylight in lower floors, while light pipes can provide corridors with sufficient daylight in upper floors.
{"title":"Using Tubular Daylighting Systems to Improve Illuminance Level in Double Loaded Corridors in Educational Buildings","authors":"A. Freewan","doi":"10.14525/JJCE.10.1.3535","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3535","url":null,"abstract":"Double loaded corridors in educational buildings generally experience a low daylight level, as they do not have enough direct contact with the outdoor environment. The task light level in those corridors is lower than that in reading or office spaces. Double loaded corridors normally depend on artificial light. On the other hand, double loaded corridors need to be lit all the day during the occupation period as one can not specify when different users could use it. This research explores the possibility of using tubular light systems in addition to some architectural solutions to provide double loaded corridors with the required daylight. The research used anidolic, light pipe and ceiling cavity systems in addition to high windows from side offices to improve daylighting in double loaded corridors. The experimental study, which has taken place at JUST, showed that anidolic systems could provide double loaded corridors with sufficient lighting levels. On the other hand, radiance simulations showed that anidolic and some other solution systems can provide corridors with sufficient daylight in lower floors, while light pipes can provide corridors with sufficient daylight in upper floors.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66631101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As a result of quick progression in computer and information technologies, computer modeling has become a vital tool in watershed research and management practices. Stanford Watershed Model (SWM) is an integrated physically based Watershed model that can be used to simulate water flow stream/canal network and overland runoff, interflow and evaporation by considering the interaction between surface water and subsurface water. The objective of this study is to apply the SWM in order to estimate the rainfall-runoff relationship for Wadi Wala streamflow semi arid area with an average annual rainfall of about 300 mm/yr and a catchment area of 1800 km. SWM has been widely accepted as a tool to synthesize a continuous hydrograph of hourly or daily streamflow. Sensitivity analysis, as well as trial and error adjustment techniques were used for the optimization of the number of parameters of the model. Comparing estimated and measured surface runoff for Wala valley indicated that the model is considerably efficient in predicting the total annual surface runoff from rainfall for similar watersheds.
{"title":"Modeling of Rainfall-Runoff Relationship in Semi - Arid Watershed in the Central Region of Jordan","authors":"N. Hadadin","doi":"10.14525/JJCE.10.1.3537","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3537","url":null,"abstract":"As a result of quick progression in computer and information technologies, computer modeling has become a vital tool in watershed research and management practices. Stanford Watershed Model (SWM) is an integrated physically based Watershed model that can be used to simulate water flow stream/canal network and overland runoff, interflow and evaporation by considering the interaction between surface water and subsurface water. The objective of this study is to apply the SWM in order to estimate the rainfall-runoff relationship for Wadi Wala streamflow semi arid area with an average annual rainfall of about 300 mm/yr and a catchment area of 1800 km. SWM has been widely accepted as a tool to synthesize a continuous hydrograph of hourly or daily streamflow. Sensitivity analysis, as well as trial and error adjustment techniques were used for the optimization of the number of parameters of the model. Comparing estimated and measured surface runoff for Wala valley indicated that the model is considerably efficient in predicting the total annual surface runoff from rainfall for similar watersheds.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66630923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. R. Suribabu, K. Prashanth, S. V. Kumar, N. Ganesh
Water is a basic necessity of all living beings for their survival on Earth. Hence, it has to be ensured to be distributed effectively. A water distribution system is a mesh of pipelines that distribute water to consumers. They are designed to satisfy adequately the water requirements for a combination of domestic, industrial and commercial purposes. A network designed with extreme care regarding pressure, losses, supply, quality of pipes and workmanship usually satisfies adequate water pressure at the consumer's taps for a specific rate of flow in an economical manner. But, due to the unexpected vertical growth and horizontal expansion, the designed network may not supply the assessed demand. This ultimately affects the supply level of low pressure zones, as well as remote places that are far away from the source. Hence, it is necessary to consider resiliency of the network at the design level of the water distribution system which can represent the capability of the network to meet additional demands or withstand demand fluctuations that may occur during peak hours. The basic principle used to improve the resilience is to increase the diameter of the pipe to the pipeline to achieve maximum flow velocity. Increasing the diameters of the various pipes of an optimally designed network or an existing network considerably increases the efficiency of the system due to the increase in its resilience index. Parallel piping system is another option adopted to enhance resilience, in which a stretch experiencing maximum velocity is chosen. An additional pipe is installed parallel to the existing pipe in that stretch, thereby increasing the flow of water from the source and decreasing the velocity in that stretch. This ultimately increases the resilience index of the system, thereby meeting the additional demand incurred on that system. This is illustrated using two benchmark networks available in literature. The results of the study indicate that the parallel pipe approach is found to be better than increasing the pipe size approach both in terms of resilience enhancement as well as economy.
{"title":"Resilience Enhancement Methods for Water Distribution Networks","authors":"C. R. Suribabu, K. Prashanth, S. V. Kumar, N. Ganesh","doi":"10.14525/JJCE.10.1.3538","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3538","url":null,"abstract":"Water is a basic necessity of all living beings for their survival on Earth. Hence, it has to be ensured to be distributed effectively. A water distribution system is a mesh of pipelines that distribute water to consumers. They are designed to satisfy adequately the water requirements for a combination of domestic, industrial and commercial purposes. A network designed with extreme care regarding pressure, losses, supply, quality of pipes and workmanship usually satisfies adequate water pressure at the consumer's taps for a specific rate of flow in an economical manner. But, due to the unexpected vertical growth and horizontal expansion, the designed network may not supply the assessed demand. This ultimately affects the supply level of low pressure zones, as well as remote places that are far away from the source. Hence, it is necessary to consider resiliency of the network at the design level of the water distribution system which can represent the capability of the network to meet additional demands or withstand demand fluctuations that may occur during peak hours. The basic principle used to improve the resilience is to increase the diameter of the pipe to the pipeline to achieve maximum flow velocity. Increasing the diameters of the various pipes of an optimally designed network or an existing network considerably increases the efficiency of the system due to the increase in its resilience index. Parallel piping system is another option adopted to enhance resilience, in which a stretch experiencing maximum velocity is chosen. An additional pipe is installed parallel to the existing pipe in that stretch, thereby increasing the flow of water from the source and decreasing the velocity in that stretch. This ultimately increases the resilience index of the system, thereby meeting the additional demand incurred on that system. This is illustrated using two benchmark networks available in literature. The results of the study indicate that the parallel pipe approach is found to be better than increasing the pipe size approach both in terms of resilience enhancement as well as economy.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66630989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Waste of construction materials has been recognized as a significant problem for different stakeholders involved in construction projects. This waste has negative impacts on the efficiency of the construction industry, the country economy at large and the environment. Thus, the minimization of construction wastes has become a pressing issue. This paper aims at investigating the main factors and causes contributing to material waste in the construction industry in Jordan. In order to achieve the aim of this study, a survey was carried out, employing semi-structured interview, to gather information from construction professionals about causes of waste in construction materials. The results show that the most significant factors contributing to construction waste can be categorized mainly into two groups: management-related and workforce-related. Examples of these are: 'lack of skilled workers and subcontractors' and 'lack of quality management system'. Decision makers and construction professionals can benefit from the findings of this study as input to build their strategies concerning construction waste management.
{"title":"Understanding the Key Factors of Construction Waste in Jordan","authors":"Jawad Al-Rifai, O. Amoudi","doi":"10.14525/JJCE.10.1.3540","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3540","url":null,"abstract":"Waste of construction materials has been recognized as a significant problem for different stakeholders involved in construction projects. This waste has negative impacts on the efficiency of the construction industry, the country economy at large and the environment. Thus, the minimization of construction wastes has become a pressing issue. This paper aims at investigating the main factors and causes contributing to material waste in the construction industry in Jordan. In order to achieve the aim of this study, a survey was carried out, employing semi-structured interview, to gather information from construction professionals about causes of waste in construction materials. The results show that the most significant factors contributing to construction waste can be categorized mainly into two groups: management-related and workforce-related. Examples of these are: 'lack of skilled workers and subcontractors' and 'lack of quality management system'. Decision makers and construction professionals can benefit from the findings of this study as input to build their strategies concerning construction waste management.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66631606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Amal Al-Far, Salam Al-Far, K. Kahhaleh, T. Al-Hadid
Chloride-induced corrosion is one of the major forms of premature concrete deterioration in Jordan, particularly in the industrial structures located in the Dead Sea Region, which is one of the most severe corrosive environments in the world. Significant forms of deterioration occurred within (10-15) years of the service life of the structures. Achieving the desired service life without expending excess funds for maintenance or rehabilitation is the objective of any designer. Proper attention to durability considerations in design can greatly extend the life of a structure. High quality concrete and adequate cover provide the first line of defense against corrosion and should always be specified to assure durability. However, the experience of the research team has shown that relying solely on concrete quality and cover as a corrosion-protection strategy may not assure long-term durability and protection against corrosion-induced damage. Concrete cracking and variations in materials and construction quality can undermine the effectiveness of "concrete only" protection strategies. This paper presents the outcomes of a 4-year duration research work conducted to evaluate the effectiveness of some selected repair and protection materials/ techniques that are available at the Jordanian market in alleviating the problem of chloride-induced corrosion, hence improving concrete durability.
{"title":"Investigation of the Effectiveness of Repairs and Protection Materials / Techniques for Alleviating Durability Problems","authors":"Amal Al-Far, Salam Al-Far, K. Kahhaleh, T. Al-Hadid","doi":"10.14525/JJCE.10.1.3539","DOIUrl":"https://doi.org/10.14525/JJCE.10.1.3539","url":null,"abstract":"Chloride-induced corrosion is one of the major forms of premature concrete deterioration in Jordan, particularly in the industrial structures located in the Dead Sea Region, which is one of the most severe corrosive environments in the world. Significant forms of deterioration occurred within (10-15) years of the service life of the structures. Achieving the desired service life without expending excess funds for maintenance or rehabilitation is the objective of any designer. Proper attention to durability considerations in design can greatly extend the life of a structure. High quality concrete and adequate cover provide the first line of defense against corrosion and should always be specified to assure durability. However, the experience of the research team has shown that relying solely on concrete quality and cover as a corrosion-protection strategy may not assure long-term durability and protection against corrosion-induced damage. Concrete cracking and variations in materials and construction quality can undermine the effectiveness of \"concrete only\" protection strategies. This paper presents the outcomes of a 4-year duration research work conducted to evaluate the effectiveness of some selected repair and protection materials/ techniques that are available at the Jordanian market in alleviating the problem of chloride-induced corrosion, hence improving concrete durability.","PeriodicalId":51814,"journal":{"name":"Jordan Journal of Civil Engineering","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2016-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66631787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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