The Experts below are selected from a list of 702 Experts worldwide ranked by ideXlab platform
Amit Rawal - One of the best experts on this subject based on the ideXlab platform.
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enhancing the mechanical properties of virgin and damaged jute polypropylene hybrid Nonwoven Geotextiles via mild alkali treatment of jute fibers
Textile Research Journal, 2018Co-Authors: Amit Rawal, Ayush Paharia, Vijay KumarAbstract:Nonwoven Geotextiles made from hybridization of natural and synthetic fibers can potentially offer distinct advantages in terms of uniformity and improved mechanical properties. To further enhance ...
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tailoring the structure and properties of jute blended Nonwoven Geotextiles via alkali treatment of jute fibers
Materials & Design, 2014Co-Authors: Amit Rawal, M M A SayeedAbstract:Abstract Geotextiles are generally made from natural or synthetic fibers and both fibers offer their own advantages and disadvantages for geotechnical applications. In this study, the jute fibers were treated with 4 wt.% sodium hydroxide (NaOH) solution in order to enhance their tensile properties. A series of needlepunched Nonwoven Geotextiles were then fabricated by formulating blends of untreated jute and polypropylene fibers and corresponding sets of Nonwovens containing alkali treated jute and polypropylene fibers in defined weight proportions. Subsequently, a comparison has been made between the physical and mechanical properties of these blended Nonwoven Geotextiles. In general, the alkali treated jute blended Nonwoven Geotextiles offer higher puncture resistance in addition to higher tensile and tearing strengths in the cross-machine (preferential) direction than their corresponding blended Geotextiles consisting of untreated jute fibers. Blended Nonwoven Geotextiles consisting of more than 40 wt.% jute fibers were not found to be useful in enhancing the mechanical properties.
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mechanical properties and damage analysis of jute polypropylene hybrid Nonwoven Geotextiles
Geotextiles and Geomembranes, 2013Co-Authors: Amit Rawal, M M A SayeedAbstract:Abstract Hybrid needlepunched Nonwoven Geotextiles are prepared in defined weight proportions of jute and polypropylene fibres. Subsequently, a comparison is made between various physical and mechanical properties of hybrid needlepunched Nonwoven Geotextiles. It was found that 40 wt.% jute was an optimum level in hybrid Nonwoven Geotextiles that had a comparable tensile strength and higher secant modulus specifically in the cross-machine (preferential) direction in comparison to 100% polypropylene based Nonwoven Geotextiles. Two types of mechanical damage (i.e., a horizontal cut and a circular hole) were artificially induced in the hybrid Nonwoven Geotextiles and their notch-sensitive behaviour and the failure mechanisms are reported.
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a comparison of wide width tensile strength to its axi symmetric tensile strength of hybrid needlepunched Nonwoven Geotextiles
Geotextiles and Geomembranes, 2013Co-Authors: Amit Rawal, Harshvardhan Saraswat, M Alamgir M Sayeed, Tahir ShahAbstract:Abstract Geotextiles are placed between the subbase and subgrade in order to enhance the bearing capacity of soft subgrades. The concentrated forces perpendicular to the plane of geotextile as a result of subgrade surface irregularities can impart axi-symmetric loading to the geotextile. In this study, a simple model of axi-symmetric tensile strength for anisotropic hybrid needlepunched Nonwoven Geotextiles has been proposed by relating to its in-plane tensile properties obtained from wide-width tensile tests in the weaker direction. A range of hybrid Geotextiles has been produced from a blend of polypropylene/viscose fibers in defined weight proportions to validate the model of axi-symmetric tensile strength. In general, a good correlation has been observed between the theoretical and experimental results of axi-symmetric tensile strength of hybrid needlepunched Nonwoven Geotextiles.
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biaxial tensile behavior of spunbonded Nonwoven Geotextiles
Geotextiles and Geomembranes, 2011Co-Authors: Amit Rawal, Aditya Kochhar, Ashish GuptaAbstract:Abstract Geotextiles can be successfully employed for any geotechnical application when they are able to sustain pre-defined levels of tensile stresses. The biaxial tensile test has an advantage over other tensile test methods in that it does not allow “necking” during deformation which simulates the operational conditions of Geotextiles under confined stresses. In this study, the model for uniaxial tensile behavior of Nonwovens has been modified to investigate the biaxial tensile behavior of spunbonded Geotextiles. The model has included the effect of fiber re-orientation, stress-strain behavior of constituent fibers, and physical characteristics of Nonwovens when the geotextile specimen is laterally constrained. A comparison is made between predicted and experimental stress-strain curves obtained from previous work ( Bais-Singh and Goswami, 1998 ). Theoretical findings of biaxial tensile behavior obtained using the layer theory are also critically discussed. In addition, it has been revealed that fiber re-orientation is a key factor in translating the random spunbonded Nonwoven Geotextiles to anisotropic structures under defined biaxial tensile stresses.
Harshvardhan Saraswat - One of the best experts on this subject based on the ideXlab platform.
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a comparison of wide width tensile strength to its axi symmetric tensile strength of hybrid needlepunched Nonwoven Geotextiles
Geotextiles and Geomembranes, 2013Co-Authors: Amit Rawal, Harshvardhan Saraswat, M Alamgir M Sayeed, Tahir ShahAbstract:Abstract Geotextiles are placed between the subbase and subgrade in order to enhance the bearing capacity of soft subgrades. The concentrated forces perpendicular to the plane of geotextile as a result of subgrade surface irregularities can impart axi-symmetric loading to the geotextile. In this study, a simple model of axi-symmetric tensile strength for anisotropic hybrid needlepunched Nonwoven Geotextiles has been proposed by relating to its in-plane tensile properties obtained from wide-width tensile tests in the weaker direction. A range of hybrid Geotextiles has been produced from a blend of polypropylene/viscose fibers in defined weight proportions to validate the model of axi-symmetric tensile strength. In general, a good correlation has been observed between the theoretical and experimental results of axi-symmetric tensile strength of hybrid needlepunched Nonwoven Geotextiles.
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stabilisation of soil using hybrid needlepunched Nonwoven Geotextiles
Geotextiles and Geomembranes, 2011Co-Authors: Amit Rawal, Harshvardhan SaraswatAbstract:Abstract In the past, natural and synthetic fibre based Geotextiles have been used for short- and long-term applications of soil erosion. It is well known that these Geotextiles complement each other in terms of various physical and mechanical properties. In this study, an attempt has been made to study various properties of hybrid Geotextiles. These hybrid Geotextiles have been produced from the blend of polypropylene/viscose and polyester/viscose fibres in defined weight proportions (0%, 20%, 40%, 60%, 80% and 100%). Subsequently, a comparison has been made between various physical and mechanical properties of needlepunched Nonwoven Geotextiles. In this research work, it was found that hybrid Geotextiles made of viscose (up to 40 wt.%) can replace 100% polypropylene or polyester based Geotextiles.
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Pore size distribution of hybrid Nonwoven Geotextiles
Geotextiles and Geomembranes, 2011Co-Authors: Amit Rawal, Harshvardhan SaraswatAbstract:Abstract Pore size distribution has become a prerequisite in determining the performance of Geotextiles for various functions including filtration, separation and reinforcement. The pore structure and morphology in a Nonwoven geotextile are known to be complex and it becomes further complicated in hybrid Nonwoven Geotextiles consisting of two types of fibers. In this study, a modified model of pore size distribution of hybrid Nonwoven Geotextiles has been proposed based on sieving-percolation pore network theory. A comparison has been made between theoretical and experimental pore size distributions of hybrid needlepunched Nonwoven Geotextiles consisting of predefined weight proportions of viscose and polyester fibers. The weight proportions of the constituent fibers have been theoretically analysed for obtaining the desired pore size distributions of hybrid Nonwoven Geotextiles.
Wenhao Hsing - One of the best experts on this subject based on the ideXlab platform.
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needle punched thermally bonded eco friendly Nonwoven Geotextiles functional properties
Materials Letters, 2016Co-Authors: Jingchzi Hsieh, Wenhao Hsing, Ching Wen Lou, Chienteng Hsieh, Yijun Pan, Jiahorng LinAbstract:Abstract As a replacement for mineral materials, Geotextiles have been pervasively used in civil engineering so as to provide separation and filtration. This study aims to recycle Kevlar selvages for the preparation of Nonwoven Geotextiles. The effects of fiber types and manufacturing processing are examined in terms of pore size, water permeability, and shear resistance (bursting strength, and puncture strength). The test results and statistical analyses indicate that a combination of 20 wt% Kevlar fibers, 60 wt% three-dimensional crimped polyester (PET) fibers, and 20 wt% low-melting-point PET (LMPET) fibers creates Geotextiles that have a small pore size, good water permeability, and good shear resistance. These Geotextiles prevent soil loss, and have greater water permeability and a higher resistance to sharp objects.
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influence of immersion conditions on the tensile strength of recycled kevlar polyester low melting point polyester Nonwoven Geotextiles through applying statistical analyses
Applied Sciences, 2016Co-Authors: Jingchzi Hsieh, Wenhao Hsing, Ching Wen Lou, Chienteng Hsieh, Yijun Pan, Jiahorng LinAbstract:The recycled Kevlar®/polyester/low-melting-point polyester (recycled Kevlar®/PET/LPET) Nonwoven Geotextiles are immersed in neutral, strong acid, and strong alkali solutions, respectively, at different temperatures for four months. Their tensile strength is then tested according to various immersion periods at various temperatures, in order to determine their durability to chemicals. For the purpose of analyzing the possible factors that influence mechanical properties of Geotextiles under diverse environmental conditions, the experimental results and statistical analyses are incorporated in this study. Therefore, influences of the content of recycled Kevlar® fibers, implementation of thermal treatment, and immersion periods on the tensile strength of recycled Kevlar®/PET/LPET Nonwoven Geotextiles are examined, after which their influential levels are statistically determined by performing multiple regression analyses. According to the results, the tensile strength of Nonwoven Geotextiles can be enhanced by adding recycled Kevlar® fibers and thermal treatment.
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Influence of Immersion Conditions on The Tensile Strength of Recycled Kevlar®/Polyester/Low-Melting-Point Polyester Nonwoven Geotextiles through Applying Statistical Analyses
MDPI AG, 2016Co-Authors: Jingchzi Hsieh, Wenhao Hsing, Ching Wen Lou, Chienteng Hsieh, Yijun Pan, Jiahorng LinAbstract:The recycled Kevlar®/polyester/low-melting-point polyester (recycled Kevlar®/PET/LPET) Nonwoven Geotextiles are immersed in neutral, strong acid, and strong alkali solutions, respectively, at different temperatures for four months. Their tensile strength is then tested according to various immersion periods at various temperatures, in order to determine their durability to chemicals. For the purpose of analyzing the possible factors that influence mechanical properties of Geotextiles under diverse environmental conditions, the experimental results and statistical analyses are incorporated in this study. Therefore, influences of the content of recycled Kevlar® fibers, implementation of thermal treatment, and immersion periods on the tensile strength of recycled Kevlar®/PET/LPET Nonwoven Geotextiles are examined, after which their influential levels are statistically determined by performing multiple regression analyses. According to the results, the tensile strength of Nonwoven Geotextiles can be enhanced by adding recycled Kevlar® fibers and thermal treatment
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effects of needle punch depth on properties of pet lpet kevlar Nonwoven Geotextiles
Advanced Materials Research, 2014Co-Authors: Jiahorng Lin, Wenhao Hsing, Jingchzi Hsieh, Ching Wen LouAbstract:Geotextile has been commonly used in civil and geotechnical engineering applications, and the majority of Geotextiles is made of Nonwoven fabrics. Therefore, this study combines crimped polyester (PET) fibers, recycled Kevlar unidirectional selvage fibers, and low-melting-point PET (LPET) fibers to form PET/Kevlar/LPET Nonwoven Geotextiles, and then examines how various neelde-punch depths influence mechanical properties of the resulting Nonwoven Geotextiles. The tensile strength, tearing strength, bursting strength, and static puncture resistance of the Nonwoven fabrics increase as a result of an increase of 0.3 cm to 0.5 cm in needle-punch depth. However, an increase of 0.5 cm to 0.7 cm causes a slight decrease in all aforementioned properties.
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transmissivity behavior of layered needlepunched Nonwoven Geotextiles
Textile Research Journal, 1999Co-Authors: Ginshing Hwang, Mingfung Lin, Baolin Hwu, Wenhao HsingAbstract:Needlepunched Nonwoven Geotextiles contain considerable void space that is available for liquid transmission. Compressing a geotextile reduces its in-plane and cross-plane liquid flow because it alters the fabric's pore structure. In this study, we investigate single-fiber and layered needlepunched Nonwoven Geotextiles as a function of various needlepunching parameters and fiber linear density. We also evaluate the transmissivity parameter β, which describes the transmissivity property of needlepunched Nonwoven Geotextiles. Experimental results indicate that these transmissivities decrease to a constant value with increasing normal stress. The transmissivity behavior of needlepunched non woven Geotextiles depends on raw material characteristics, needlepunching parameters, and normal stress. This study also proposes relationships to predict the transmissivity behavior of two needlepunched Nonwoven Geotextiles in parallel.
M M A Sayeed - One of the best experts on this subject based on the ideXlab platform.
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tailoring the structure and properties of jute blended Nonwoven Geotextiles via alkali treatment of jute fibers
Materials & Design, 2014Co-Authors: Amit Rawal, M M A SayeedAbstract:Abstract Geotextiles are generally made from natural or synthetic fibers and both fibers offer their own advantages and disadvantages for geotechnical applications. In this study, the jute fibers were treated with 4 wt.% sodium hydroxide (NaOH) solution in order to enhance their tensile properties. A series of needlepunched Nonwoven Geotextiles were then fabricated by formulating blends of untreated jute and polypropylene fibers and corresponding sets of Nonwovens containing alkali treated jute and polypropylene fibers in defined weight proportions. Subsequently, a comparison has been made between the physical and mechanical properties of these blended Nonwoven Geotextiles. In general, the alkali treated jute blended Nonwoven Geotextiles offer higher puncture resistance in addition to higher tensile and tearing strengths in the cross-machine (preferential) direction than their corresponding blended Geotextiles consisting of untreated jute fibers. Blended Nonwoven Geotextiles consisting of more than 40 wt.% jute fibers were not found to be useful in enhancing the mechanical properties.
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mechanical properties and damage analysis of jute polypropylene hybrid Nonwoven Geotextiles
Geotextiles and Geomembranes, 2013Co-Authors: Amit Rawal, M M A SayeedAbstract:Abstract Hybrid needlepunched Nonwoven Geotextiles are prepared in defined weight proportions of jute and polypropylene fibres. Subsequently, a comparison is made between various physical and mechanical properties of hybrid needlepunched Nonwoven Geotextiles. It was found that 40 wt.% jute was an optimum level in hybrid Nonwoven Geotextiles that had a comparable tensile strength and higher secant modulus specifically in the cross-machine (preferential) direction in comparison to 100% polypropylene based Nonwoven Geotextiles. Two types of mechanical damage (i.e., a horizontal cut and a circular hole) were artificially induced in the hybrid Nonwoven Geotextiles and their notch-sensitive behaviour and the failure mechanisms are reported.
Jiahorng Lin - One of the best experts on this subject based on the ideXlab platform.
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statistical analyses for tensile properties of Nonwoven Geotextiles at different ambient environmental temperatures
Journal of Industrial Textiles, 2017Co-Authors: Jingchzi Hsieh, Chenhung Huang, Ching Wen Lou, Jiahorng LinAbstract:Geotextiles primarily provide reinforcement, and their tensile properties can resist stresses and prevent soil structure deformation. Nonwoven Geotextiles are also commonly used in railways, roads,...
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needle punched thermally bonded eco friendly Nonwoven Geotextiles functional properties
Materials Letters, 2016Co-Authors: Jingchzi Hsieh, Wenhao Hsing, Ching Wen Lou, Chienteng Hsieh, Yijun Pan, Jiahorng LinAbstract:Abstract As a replacement for mineral materials, Geotextiles have been pervasively used in civil engineering so as to provide separation and filtration. This study aims to recycle Kevlar selvages for the preparation of Nonwoven Geotextiles. The effects of fiber types and manufacturing processing are examined in terms of pore size, water permeability, and shear resistance (bursting strength, and puncture strength). The test results and statistical analyses indicate that a combination of 20 wt% Kevlar fibers, 60 wt% three-dimensional crimped polyester (PET) fibers, and 20 wt% low-melting-point PET (LMPET) fibers creates Geotextiles that have a small pore size, good water permeability, and good shear resistance. These Geotextiles prevent soil loss, and have greater water permeability and a higher resistance to sharp objects.
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influence of immersion conditions on the tensile strength of recycled kevlar polyester low melting point polyester Nonwoven Geotextiles through applying statistical analyses
Applied Sciences, 2016Co-Authors: Jingchzi Hsieh, Wenhao Hsing, Ching Wen Lou, Chienteng Hsieh, Yijun Pan, Jiahorng LinAbstract:The recycled Kevlar®/polyester/low-melting-point polyester (recycled Kevlar®/PET/LPET) Nonwoven Geotextiles are immersed in neutral, strong acid, and strong alkali solutions, respectively, at different temperatures for four months. Their tensile strength is then tested according to various immersion periods at various temperatures, in order to determine their durability to chemicals. For the purpose of analyzing the possible factors that influence mechanical properties of Geotextiles under diverse environmental conditions, the experimental results and statistical analyses are incorporated in this study. Therefore, influences of the content of recycled Kevlar® fibers, implementation of thermal treatment, and immersion periods on the tensile strength of recycled Kevlar®/PET/LPET Nonwoven Geotextiles are examined, after which their influential levels are statistically determined by performing multiple regression analyses. According to the results, the tensile strength of Nonwoven Geotextiles can be enhanced by adding recycled Kevlar® fibers and thermal treatment.
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Influence of Immersion Conditions on The Tensile Strength of Recycled Kevlar®/Polyester/Low-Melting-Point Polyester Nonwoven Geotextiles through Applying Statistical Analyses
MDPI AG, 2016Co-Authors: Jingchzi Hsieh, Wenhao Hsing, Ching Wen Lou, Chienteng Hsieh, Yijun Pan, Jiahorng LinAbstract:The recycled Kevlar®/polyester/low-melting-point polyester (recycled Kevlar®/PET/LPET) Nonwoven Geotextiles are immersed in neutral, strong acid, and strong alkali solutions, respectively, at different temperatures for four months. Their tensile strength is then tested according to various immersion periods at various temperatures, in order to determine their durability to chemicals. For the purpose of analyzing the possible factors that influence mechanical properties of Geotextiles under diverse environmental conditions, the experimental results and statistical analyses are incorporated in this study. Therefore, influences of the content of recycled Kevlar® fibers, implementation of thermal treatment, and immersion periods on the tensile strength of recycled Kevlar®/PET/LPET Nonwoven Geotextiles are examined, after which their influential levels are statistically determined by performing multiple regression analyses. According to the results, the tensile strength of Nonwoven Geotextiles can be enhanced by adding recycled Kevlar® fibers and thermal treatment
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effects of needle punch depth on properties of pet lpet kevlar Nonwoven Geotextiles
Advanced Materials Research, 2014Co-Authors: Jiahorng Lin, Wenhao Hsing, Jingchzi Hsieh, Ching Wen LouAbstract:Geotextile has been commonly used in civil and geotechnical engineering applications, and the majority of Geotextiles is made of Nonwoven fabrics. Therefore, this study combines crimped polyester (PET) fibers, recycled Kevlar unidirectional selvage fibers, and low-melting-point PET (LPET) fibers to form PET/Kevlar/LPET Nonwoven Geotextiles, and then examines how various neelde-punch depths influence mechanical properties of the resulting Nonwoven Geotextiles. The tensile strength, tearing strength, bursting strength, and static puncture resistance of the Nonwoven fabrics increase as a result of an increase of 0.3 cm to 0.5 cm in needle-punch depth. However, an increase of 0.5 cm to 0.7 cm causes a slight decrease in all aforementioned properties.
