The Experts below are selected from a list of 93 Experts worldwide ranked by ideXlab platform
Shahiron Shahidan - One of the best experts on this subject based on the ideXlab platform.
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Concrete Incorporated with Optimum Percentages of Recycled Polyethylene Terephthalate (PET) Bottle Fiber
International Journal of Integrated Engineering, 2018Co-Authors: Shahiron ShahidanAbstract:Plastic solid waste generation increases every year with the current consumption habit prevalent in the society nowadays. The improper disposal of plastic has been a major concern to the environment as it is not easily degradable. The issue of environmental pollution caused by Polyethylene Terephthalates (PET) has been extensively discussed and the best solution proposed is recycling. Therefore, one of the potential means to the problem is to recycle polyethylene terephthalate (PET) in the construction industry as fiber concrete (FC). FC is a composite material resulting from the addition of fibers to ordinary concrete. The objective of this research is to determine the mechanical properties and the optimum percentages of recycled polyethylene terephthalate (PET) fibers in ordinary concrete. In this study, straight and irregular recycled polyethylene terephthalate (PET) fibers were used. The fibers were simply cut from polyethylene terephthalate (PET) plastic bottles. The length and width of recycled polyethylene terephthalate (PET) fiber were fixed at 50 mm and 5 mm respectively. The percentages of recycled PET fibers added in the concrete mix were 0.5%, 1%, 1.5% and 2.0% respectively according to the volume of concrete to continue research of Ochi et al. (2007). A water-cement ratio of 0.45 was accepted for all ranges. The Tests that were conducted included the slump Test, compressive strength Test and Splitting Tensile strength Test. The specimens were Tested on day 7 and day 28 after the concrete was mixed. The results obtained from each Test indicated that when the percentage of recycled polyethylene terephthalate (PET) fiber used increases, the values obtained from the slump Test and compressive strength Test decreases while the value obtained from the Splitting Tensile Test increases.
Vitor M C F Cunha - One of the best experts on this subject based on the ideXlab platform.
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mechanical performance of fibre reinforced concrete the role of fibre distribution and orientation
XIV Portuguese Conference on Fracture PCF 2014, 2014Co-Authors: Amin Abrishambaf, Joaquim A O Barros, Vitor M C F CunhaAbstract:Adding fibres to concrete provides several advantages, especially in terms of controlling the crack opening width after the cracking initiation of the composite. However, distribution and orientation of the fibres toward the crack plane are significantly important in order to provide the maximum benefit for controlling crack width. Therefore, in this study, the effect of the fibre distribution and orientation on the Tensile behaviour of the steel fibre reinforced self-compacting concrete (SFRSCC) specimens is investigated. For this purpose, cores that are extracted from distinct locations of a panel will be subjected to indirect (Splitting) and direct Tensile Tests. By modeling the Splitting Tensile Test under the finite element framework and by performing an Inverse Analysis (IA), the achieved stress-crack opening relationship (σ-w) is compared with the one obtained directly from the experimental curve obtained in the direct Tensile Tests.
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relation between fibre distribution and post cracking behaviour in steel fibre reinforced self compacting concrete panels
Cement and Concrete Research, 2013Co-Authors: Amin Abrishambaf, Joaquim A O Barros, Vitor M C F CunhaAbstract:Abstract In this research, the influence of the fibre distribution and orientation on the post-cracking behaviour of steel fibre reinforced self-compacting concrete (SFRSCC) panels was studied. To perform this evaluation, SFRSCC panels were cast from their centre point. For each SFRSCC panel, cylindrical specimens were extracted and notched either parallel or perpendicular to the concrete flow direction, in order to evaluate the influence of fibre dispersion and orientation on the Tensile performance. The post-cracking behaviour was assessed by both Splitting Tensile Tests and uniaxial Tensile Tests. To assess the fibre density and orientation through the panels, an image analysis technique was employed across cut planes on each Tested specimen. It is found that the Splitting Tensile Test overestimates the post-cracking parameters. Specimens with notched plane parallel to the concrete flow direction show considerable higher post-cracking strength than specimens with notched plane perpendicular to the flow direction.
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assessment of fibre orientation and distribution in steel fibre reinforced self compacting concrete panels
2012Co-Authors: Amin Abrishambaf, Joaquim A O Barros, Vitor M C F Cunha, F N M CunhaAbstract:The benefits of adding fibres to concrete lie, mostly, in improving the post-cracking behaviour, since its ability to transfer stresses across cracked sections is substantially increased. The post-cracking strength is dependent not only on the fibre geometry, mechanical performance and fibre/matrix interface properties, but also on the fibre orientation and distribution. Previous works have shown that in self-compacting concrete matrices, there is a preferential fibre alignment according to the concrete’s flow in the fresh state. Having in mind that fibres are more efficient if they are oriented according the principal Tensile stresses, a preferential fibre alignment on a certain direction could either enhance or diminish the material and the structural performance of this composite. In this paper, it is investigated the influence of the fibre orientation and distribution on the post-cracking behaviour of the steel fibre reinforced self-compacting concrete (SFRSCC). To perform this evaluation, SFRSCC panels were casted from their centre point. Two self-compacting mixtures were prepared using the same base mix proportions. For each SFRSCC panel cylindrical specimens were extracted and the post-cracking behaviour was assessed from a crack width controlled Splitting Tensile Test.
Shahida Shahiro - One of the best experts on this subject based on the ideXlab platform.
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Concrete Incorporated With Optimum Percentages of Recycled Polyethylene Terephthalate (PET) Bottle Fiber
'Penerbit UTHM', 2018Co-Authors: Shahida ShahiroAbstract:Plastic solid waste generation increases every year with the current consumption habit prevalent in the society nowadays. The improper disposal of plastic has been a major concern to the environment as it is not easily degradable. The issue of environmental pollution caused by polyethylene terephthalates (PET) has been extensively discussed and the best solution proposed is recycling. Therefore, one of the potential means to the problem is to recycle PET in the construction industry as fiber concrete (FC). FC is a composite material resulting from the addition of fibers to ordinary concrete. The objective of this research is to determine the compressive strength, Splitting Tensile strength and also the optimum percentages of recycled PET fibers in ordinary concrete. In this study, straight and irregular recycled PET fibers were used. The fibers were simply cut from PET plastic bottles. The length and width of recycled PET fiber were fixed at 50 mm and 5 mm respectively. The chosen percentages were 0.5%, 1.0%, 1.5% and 2.0% of fiber. A water-cement ratio of 0.45 was accepted for all ranges. The Tests that were conducted included the slump Test, compressive strength Test and Splitting Tensile strength Test. The specimens were Tested on day 7 and day 28 after the concrete was mixed. The results obtained from each Test indicated that when the percentage of recycled PET fiber used increases, the values obtained from the slump Test and compressive strength Test decreases while the value obtained from the Splitting Tensile Test increase
Amin Abrishambaf - One of the best experts on this subject based on the ideXlab platform.
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mechanical performance of fibre reinforced concrete the role of fibre distribution and orientation
XIV Portuguese Conference on Fracture PCF 2014, 2014Co-Authors: Amin Abrishambaf, Joaquim A O Barros, Vitor M C F CunhaAbstract:Adding fibres to concrete provides several advantages, especially in terms of controlling the crack opening width after the cracking initiation of the composite. However, distribution and orientation of the fibres toward the crack plane are significantly important in order to provide the maximum benefit for controlling crack width. Therefore, in this study, the effect of the fibre distribution and orientation on the Tensile behaviour of the steel fibre reinforced self-compacting concrete (SFRSCC) specimens is investigated. For this purpose, cores that are extracted from distinct locations of a panel will be subjected to indirect (Splitting) and direct Tensile Tests. By modeling the Splitting Tensile Test under the finite element framework and by performing an Inverse Analysis (IA), the achieved stress-crack opening relationship (σ-w) is compared with the one obtained directly from the experimental curve obtained in the direct Tensile Tests.
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relation between fibre distribution and post cracking behaviour in steel fibre reinforced self compacting concrete panels
Cement and Concrete Research, 2013Co-Authors: Amin Abrishambaf, Joaquim A O Barros, Vitor M C F CunhaAbstract:Abstract In this research, the influence of the fibre distribution and orientation on the post-cracking behaviour of steel fibre reinforced self-compacting concrete (SFRSCC) panels was studied. To perform this evaluation, SFRSCC panels were cast from their centre point. For each SFRSCC panel, cylindrical specimens were extracted and notched either parallel or perpendicular to the concrete flow direction, in order to evaluate the influence of fibre dispersion and orientation on the Tensile performance. The post-cracking behaviour was assessed by both Splitting Tensile Tests and uniaxial Tensile Tests. To assess the fibre density and orientation through the panels, an image analysis technique was employed across cut planes on each Tested specimen. It is found that the Splitting Tensile Test overestimates the post-cracking parameters. Specimens with notched plane parallel to the concrete flow direction show considerable higher post-cracking strength than specimens with notched plane perpendicular to the flow direction.
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assessment of fibre orientation and distribution in steel fibre reinforced self compacting concrete panels
2012Co-Authors: Amin Abrishambaf, Joaquim A O Barros, Vitor M C F Cunha, F N M CunhaAbstract:The benefits of adding fibres to concrete lie, mostly, in improving the post-cracking behaviour, since its ability to transfer stresses across cracked sections is substantially increased. The post-cracking strength is dependent not only on the fibre geometry, mechanical performance and fibre/matrix interface properties, but also on the fibre orientation and distribution. Previous works have shown that in self-compacting concrete matrices, there is a preferential fibre alignment according to the concrete’s flow in the fresh state. Having in mind that fibres are more efficient if they are oriented according the principal Tensile stresses, a preferential fibre alignment on a certain direction could either enhance or diminish the material and the structural performance of this composite. In this paper, it is investigated the influence of the fibre orientation and distribution on the post-cracking behaviour of the steel fibre reinforced self-compacting concrete (SFRSCC). To perform this evaluation, SFRSCC panels were casted from their centre point. Two self-compacting mixtures were prepared using the same base mix proportions. For each SFRSCC panel cylindrical specimens were extracted and the post-cracking behaviour was assessed from a crack width controlled Splitting Tensile Test.
Joaquim A O Barros - One of the best experts on this subject based on the ideXlab platform.
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mechanical performance of fibre reinforced concrete the role of fibre distribution and orientation
XIV Portuguese Conference on Fracture PCF 2014, 2014Co-Authors: Amin Abrishambaf, Joaquim A O Barros, Vitor M C F CunhaAbstract:Adding fibres to concrete provides several advantages, especially in terms of controlling the crack opening width after the cracking initiation of the composite. However, distribution and orientation of the fibres toward the crack plane are significantly important in order to provide the maximum benefit for controlling crack width. Therefore, in this study, the effect of the fibre distribution and orientation on the Tensile behaviour of the steel fibre reinforced self-compacting concrete (SFRSCC) specimens is investigated. For this purpose, cores that are extracted from distinct locations of a panel will be subjected to indirect (Splitting) and direct Tensile Tests. By modeling the Splitting Tensile Test under the finite element framework and by performing an Inverse Analysis (IA), the achieved stress-crack opening relationship (σ-w) is compared with the one obtained directly from the experimental curve obtained in the direct Tensile Tests.
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relation between fibre distribution and post cracking behaviour in steel fibre reinforced self compacting concrete panels
Cement and Concrete Research, 2013Co-Authors: Amin Abrishambaf, Joaquim A O Barros, Vitor M C F CunhaAbstract:Abstract In this research, the influence of the fibre distribution and orientation on the post-cracking behaviour of steel fibre reinforced self-compacting concrete (SFRSCC) panels was studied. To perform this evaluation, SFRSCC panels were cast from their centre point. For each SFRSCC panel, cylindrical specimens were extracted and notched either parallel or perpendicular to the concrete flow direction, in order to evaluate the influence of fibre dispersion and orientation on the Tensile performance. The post-cracking behaviour was assessed by both Splitting Tensile Tests and uniaxial Tensile Tests. To assess the fibre density and orientation through the panels, an image analysis technique was employed across cut planes on each Tested specimen. It is found that the Splitting Tensile Test overestimates the post-cracking parameters. Specimens with notched plane parallel to the concrete flow direction show considerable higher post-cracking strength than specimens with notched plane perpendicular to the flow direction.
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assessment of fibre orientation and distribution in steel fibre reinforced self compacting concrete panels
2012Co-Authors: Amin Abrishambaf, Joaquim A O Barros, Vitor M C F Cunha, F N M CunhaAbstract:The benefits of adding fibres to concrete lie, mostly, in improving the post-cracking behaviour, since its ability to transfer stresses across cracked sections is substantially increased. The post-cracking strength is dependent not only on the fibre geometry, mechanical performance and fibre/matrix interface properties, but also on the fibre orientation and distribution. Previous works have shown that in self-compacting concrete matrices, there is a preferential fibre alignment according to the concrete’s flow in the fresh state. Having in mind that fibres are more efficient if they are oriented according the principal Tensile stresses, a preferential fibre alignment on a certain direction could either enhance or diminish the material and the structural performance of this composite. In this paper, it is investigated the influence of the fibre orientation and distribution on the post-cracking behaviour of the steel fibre reinforced self-compacting concrete (SFRSCC). To perform this evaluation, SFRSCC panels were casted from their centre point. Two self-compacting mixtures were prepared using the same base mix proportions. For each SFRSCC panel cylindrical specimens were extracted and the post-cracking behaviour was assessed from a crack width controlled Splitting Tensile Test.