The Experts below are selected from a list of 3795 Experts worldwide ranked by ideXlab platform
Mohamed Rehan Karim - One of the best experts on this subject based on the ideXlab platform.
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Stiffness Modulus of polyethylene terephthalate modified asphalt mixture a statistical analysis of the laboratory testing results
Materials & Design, 2015Co-Authors: Taher Baghaee Moghaddam, Mehrtash Soltani, Mohamed Rehan KarimAbstract:Stiffness of asphalt mixture is a fundamental design parameter of flexible pavement. According to literature, Stiffness value is very susceptible to environmental and loading conditions. In this paper, effects of applied stress and temperature on the Stiffness Modulus of unmodified and Polyethylene Terephthalate (PET) modified asphalt mixtures were evaluated using Response Surface Methodology (RSM). A quadratic model was successfully fitted to the experimental data. Based on the results achieved in this study, the temperature variation had the highest impact on the mixture’s Stiffness. Besides, PET content and amount of stress showed to have almost the same effect on the Stiffness of mixtures. The optimal amount of PET was found to be 0.41% by weight of aggregate particles to reach the highest Stiffness value.
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dynamic properties of stone mastic asphalt mixtures containing waste plastic bottles
Construction and Building Materials, 2012Co-Authors: Taher Baghaee Moghaddam, Mohamed Rehan Karim, Tamalkhani SyammaunAbstract:Abstract Fatigue failure is a common problem of asphaltic concrete which can lead to pavement damage. Many studies have been conducted to find ways for increasing fatigue life of asphalt concrete mixtures. This study investigates effects of adding waste polyethylene terephthalate (PET) on Stiffness and fatigue properties of SMA mixtures at optimum asphalt contents. Different percentages of waste PET with maximum size of 2.36 mm were added to SMA mixtures. Indirect tensile Stiffness Modulus test and indirect tensile fatigue test were conducted at temperature of 20 °C and at three different stress levels (250, 350, 450 kPa). The results showed that Stiffness Modulus of mixture increased at lower amount of PET content; however, adding higher amount of PET made mixture less stiff. In addition, PET reinforced mixtures exhibit significantly higher fatigue lives compared to the mixtures without PET.
Taher Baghaee Moghaddam - One of the best experts on this subject based on the ideXlab platform.
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Stiffness Modulus of polyethylene terephthalate modified asphalt mixture a statistical analysis of the laboratory testing results
Materials & Design, 2015Co-Authors: Taher Baghaee Moghaddam, Mehrtash Soltani, Mohamed Rehan KarimAbstract:Stiffness of asphalt mixture is a fundamental design parameter of flexible pavement. According to literature, Stiffness value is very susceptible to environmental and loading conditions. In this paper, effects of applied stress and temperature on the Stiffness Modulus of unmodified and Polyethylene Terephthalate (PET) modified asphalt mixtures were evaluated using Response Surface Methodology (RSM). A quadratic model was successfully fitted to the experimental data. Based on the results achieved in this study, the temperature variation had the highest impact on the mixture’s Stiffness. Besides, PET content and amount of stress showed to have almost the same effect on the Stiffness of mixtures. The optimal amount of PET was found to be 0.41% by weight of aggregate particles to reach the highest Stiffness value.
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dynamic properties of stone mastic asphalt mixtures containing waste plastic bottles
Construction and Building Materials, 2012Co-Authors: Taher Baghaee Moghaddam, Mohamed Rehan Karim, Tamalkhani SyammaunAbstract:Abstract Fatigue failure is a common problem of asphaltic concrete which can lead to pavement damage. Many studies have been conducted to find ways for increasing fatigue life of asphalt concrete mixtures. This study investigates effects of adding waste polyethylene terephthalate (PET) on Stiffness and fatigue properties of SMA mixtures at optimum asphalt contents. Different percentages of waste PET with maximum size of 2.36 mm were added to SMA mixtures. Indirect tensile Stiffness Modulus test and indirect tensile fatigue test were conducted at temperature of 20 °C and at three different stress levels (250, 350, 450 kPa). The results showed that Stiffness Modulus of mixture increased at lower amount of PET content; however, adding higher amount of PET made mixture less stiff. In addition, PET reinforced mixtures exhibit significantly higher fatigue lives compared to the mixtures without PET.
C T Gnanendran - One of the best experts on this subject based on the ideXlab platform.
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Indirect diametrical tensile testing with internal displacement measurement and Stiffness determination
Geotechnical Testing Journal, 2020Co-Authors: C T Gnanendran, Jegatheesan PiratheepanAbstract:This paper examines the indirect diametrical tensile (IDT) testing method and its suitability for determining the tensile strength and Stiffness Modulus properties of a lightly cementitiously stabilized granular base material that are required for the design of a pavement structure involving this material. A new IDT testing setup with internal deformation measurement is presented in this paper. The suitability of this testing arrangement for determining the tensile strength and Stiffness characteristics of a lightly stabilized granular base material was examined by studying the IDT strength and Stiffness characteristics of two typical granular base materials stabilized with 3–5 % slag-lime and 1.5 % general blend cement-flyash. This study indicates that the internal deformation measurement setup presented in this paper for IDT testing is suitable for carrying out both monotonic and cyclic load IDT tests to determine the IDT strength, static Stiffness Modulus, and dynamic Stiffness Modulus properties of lightly cementitiously stabilized granular base materials reliably and consistently.
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Dynamic Modulus and Fatigue Testing of Lightly Cementitiously Stabilized Granular Pavement Materials
2020Co-Authors: Piratheepan Jegatheesan, C T GnanendranAbstract:This paper examines the characterization of a granular material lightly stabilized with slag-lime cementitious binder particularly utilizing the monotonic and cyclic load Indirect Tensile Test (IDT) testing method. An extensive laboratory investigation was carried out to determine the mechanical properties of the lightly stabilized granular material and to establish fatigue life relationships by IDT testing and typical results obtained from this ongoing research are presented in this paper. This study shows that the static Stiffness Modulus and dynamic Stiffness Modulus of the stabilized material increases with binder content and showed little change with moisture content variation around the optimum moisture content. Fatigue life relationships were established using two methods, namely the approach of determining the number of cycles for 50% reduction in the Stiffness compared to the initial Stiffness and the energy ratio method, and they both showed similar linear relationships. It is therefore concluded that cyclic load IDT testing can be used reliably to characterize lightly stabilized granular materials with slag-lime in terms of their strength, Stiffness Modulus and fatigue life relationships.
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determination of Stiffness Modulus and poisson s ratio of lightly stabilized granular materials from indirect diametral tensile testing
Geotechnical Testing Journal, 2016Co-Authors: Dalim K Paul, C T GnanendranAbstract:Lightly cementitiously stabilized granular materials are generally characterised by their tensile properties that are required for the analysis and design of a pavement structure involving these materials. Tensile properties include tensile strength, Stiffness Modulus, and Poisson's ratio. However, there are limited studies on the mechanistic determination of Stiffness Modulus and Poisson's ratio of lightly stabilized materials; rather, a magnitude of Poisson's ratio is often assumed. This paper examines the use of monotonic and cyclic load indirect diametral tensile (IDT) testing to determine the Poisson's ratio and Stiffness Modulus of lightly stabilized granular materials. The experimental program included the determination of IDT strength, static and dynamic Stiffness Modulus, and Poisson's ratio for a typical freshly quarried granular base material stabilized by the addition of 0.5 to 3 % cement-flyash and 1.5 to 3 % slag-lime slow-setting binder. A new IDT testing setup to measure both the horizontal and vertical deformations along the diameters of an IDT specimen was developed and the tests were conducted on 28 days cured samples prepared by gyratory compaction. Details of the new IDT testing arrangement with on-sample deformation measurement for performing monotonic and cyclic load testing to obtain reliable data are discussed. This study indicates that the proposed IDT testing setup with on-sample deformation measurement could be used reliably for determining the tensile properties of lightly stabilized granular materials including the Poisson's ratio.
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Dynamic Modulus and fatigue testing of lightly cementitiously stabilized granular pavement materials
Airfield and Highway Pavements, 2008Co-Authors: Piratheepan Jegatheesan, C T GnanendranAbstract:This paper examines the characterization of a granular material lightly stabilized with slag-lime cementitious binder particularly utilizing the monotonic and cyclic load IDT testing method. An extensive laboratory investigation was carried out to determine the mechanical properties of the lightly stabilized granular material and to establish fatigue life relationships by IDT testing and typical results obtained from this ongoing research are presented in this paper. This study shows that the static Stiffness Modulus and dynamic Stiffness Modulus of the stabilized material increases with binder content and showed little change with moisture content variation around the optimum moisture content. Fatigue life relationships were established using two methods, namely the approach of determining the number of cycles for 50% reduction in the Stiffness compared to the initial Stiffness and the energy ratio method, and they both showed similar linear relationships. It is therefore concluded that cyclic load IDT testing can be used reliably to characterize lightly stabilized granular materials with slag-lime in terms of their strength, Stiffness Modulus and fatigue life relationships
Mahmoud Ameri - One of the best experts on this subject based on the ideXlab platform.
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new achievements on positive effects of nanotechnology zyco soil on rutting resistance and Stiffness Modulus of glasphalt mix
Construction and Building Materials, 2015Co-Authors: Hassan Ziari, Hamid Behbahani, N Kamboozia, Mahmoud AmeriAbstract:Abstract On the basis of previous studies, it has been demonstrated that glass is capable of improving the behavioral characteristics of asphalt mixtures. The purpose of the present study is to assess the effect of nanotechnology zycosoil on rutting resistance and Stiffness Modulus of glasphalt mixtures through laboratory experiment. For this purpose asphalt samples with two types of graining in their optimal percentage of bitumen were subject to the dynamic tests and their mechanical properties are evaluated. Eventually, observations on the creeping behavior and Stiffness Modulus of the asphalt samples with two different graining types for the different percentages of waste crushed glass have been presented. The results of the study indicate that the samples of glasphalt modified with nanotechnology zyco-soil show a remarkably better performance as compared to the samples of conventional asphalt.
Hamid Behbahani - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of Fatigue and Rutting Behaviour of Hot Mix Asphalt Containing Rock Wool
International Journal of Civil Engineering, 2020Co-Authors: Hamid Behbahani, Vahid Najafi Moghaddam Gilani, Reza Salehfard, Daniel SafariAbstract:The objective of this study is to evaluate the effects of adding rock wool fibres on the improvement in the dynamic properties of the hot mix asphalt. To this aim, the effects of 0.2, 0.4, 0.6, and 0.8 of percent rock wool fibres by weight of mixture on the dynamic properties of asphalt mixtures were evaluated. Accordingly, indirect tensile Stiffness Modulus, indirect tensile fatigue and repeated load axial tests were performed to measure the Stiffness Modulus, fatigue life and rutting resistance of asphalt mixtures. The fatigue life of modified mixtures with different concentrations of rock wool increased 4%, 32%, 35% and 65% at 25 °C with regard to control, respectively. Furthermore, adding 0.8% of Rockwool resulted in 84% and 130% increased in resistance to permanent deformation at the stress of 150 kPa and 300 kPa, respectively. Consequently, incorporation of rock wool in asphalt mixture can be beneficial as it enhances the performance of road pavements against distresses such as rutting and fatigue cracking.
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new achievements on positive effects of nanotechnology zyco soil on rutting resistance and Stiffness Modulus of glasphalt mix
Construction and Building Materials, 2015Co-Authors: Hassan Ziari, Hamid Behbahani, N Kamboozia, Mahmoud AmeriAbstract:Abstract On the basis of previous studies, it has been demonstrated that glass is capable of improving the behavioral characteristics of asphalt mixtures. The purpose of the present study is to assess the effect of nanotechnology zycosoil on rutting resistance and Stiffness Modulus of glasphalt mixtures through laboratory experiment. For this purpose asphalt samples with two types of graining in their optimal percentage of bitumen were subject to the dynamic tests and their mechanical properties are evaluated. Eventually, observations on the creeping behavior and Stiffness Modulus of the asphalt samples with two different graining types for the different percentages of waste crushed glass have been presented. The results of the study indicate that the samples of glasphalt modified with nanotechnology zyco-soil show a remarkably better performance as compared to the samples of conventional asphalt.