The Experts below are selected from a list of 213 Experts worldwide ranked by ideXlab platform
Byung Tak Hong - One of the best experts on this subject based on the ideXlab platform.
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Shrinkage and corrosion resistance of amorphous Metallic-Fiber-reinforced cement composites
Composite Structures, 2014Co-Authors: Se Jin Choi, Byung Tak Hong, Su-jin Lee, J. -p. WonAbstract:This study evaluated the corrosion resistance and plastic shrinkage control properties of amorphous Metallic Fiber used to reinforce cement composites. Amorphous Metallic Fibers, based on amorphous metals, are typically thin and are believed to be highly corrosion resistant. After exposing amorphous Metallic Fibers to five different types of degradation environments for 30, 60, and 90. days, a tensile test was conducted to evaluate corrosion resistance and reduction in tensile strength. Also, a plastic shrinkage crack test of amorphous Metallic-Fiber-reinforced cement composite was carried out, and comparisons were made with conventional steel-, polypropylene-, and polyvinyl-alcohol-Fiber-reinforced cement composites. Test results show that amorphous Metallic Fibers displayed higher corrosion resistance than did steel in every degradation environment, and plastic shrinkage crack control performance was excellent. © 2013 Elsevier Ltd.
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shrinkage and corrosion resistance of amorphous Metallic Fiber reinforced cement composites
Composite Structures, 2014Co-Authors: Se Jin Choi, Byung Tak HongAbstract:Abstract This study evaluated the corrosion resistance and plastic shrinkage control properties of amorphous Metallic Fiber used to reinforce cement composites. Amorphous Metallic Fibers, based on amorphous metals, are typically thin and are believed to be highly corrosion resistant. After exposing amorphous Metallic Fibers to five different types of degradation environments for 30, 60, and 90 days, a tensile test was conducted to evaluate corrosion resistance and reduction in tensile strength. Also, a plastic shrinkage crack test of amorphous Metallic-Fiber-reinforced cement composite was carried out, and comparisons were made with conventional steel-, polypropylene-, and polyvinyl-alcohol-Fiber-reinforced cement composites. Test results show that amorphous Metallic Fibers displayed higher corrosion resistance than did steel in every degradation environment, and plastic shrinkage crack control performance was excellent.
Se Jin Choi - One of the best experts on this subject based on the ideXlab platform.
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Shrinkage and corrosion resistance of amorphous Metallic-Fiber-reinforced cement composites
Composite Structures, 2014Co-Authors: Se Jin Choi, Byung Tak Hong, Su-jin Lee, J. -p. WonAbstract:This study evaluated the corrosion resistance and plastic shrinkage control properties of amorphous Metallic Fiber used to reinforce cement composites. Amorphous Metallic Fibers, based on amorphous metals, are typically thin and are believed to be highly corrosion resistant. After exposing amorphous Metallic Fibers to five different types of degradation environments for 30, 60, and 90. days, a tensile test was conducted to evaluate corrosion resistance and reduction in tensile strength. Also, a plastic shrinkage crack test of amorphous Metallic-Fiber-reinforced cement composite was carried out, and comparisons were made with conventional steel-, polypropylene-, and polyvinyl-alcohol-Fiber-reinforced cement composites. Test results show that amorphous Metallic Fibers displayed higher corrosion resistance than did steel in every degradation environment, and plastic shrinkage crack control performance was excellent. © 2013 Elsevier Ltd.
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shrinkage and corrosion resistance of amorphous Metallic Fiber reinforced cement composites
Composite Structures, 2014Co-Authors: Se Jin Choi, Byung Tak HongAbstract:Abstract This study evaluated the corrosion resistance and plastic shrinkage control properties of amorphous Metallic Fiber used to reinforce cement composites. Amorphous Metallic Fibers, based on amorphous metals, are typically thin and are believed to be highly corrosion resistant. After exposing amorphous Metallic Fibers to five different types of degradation environments for 30, 60, and 90 days, a tensile test was conducted to evaluate corrosion resistance and reduction in tensile strength. Also, a plastic shrinkage crack test of amorphous Metallic-Fiber-reinforced cement composite was carried out, and comparisons were made with conventional steel-, polypropylene-, and polyvinyl-alcohol-Fiber-reinforced cement composites. Test results show that amorphous Metallic Fibers displayed higher corrosion resistance than did steel in every degradation environment, and plastic shrinkage crack control performance was excellent.
Gyeongcheol Choe - One of the best experts on this subject based on the ideXlab platform.
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effects of strain rate on the tensile behavior of cementitious composites made with amorphous Metallic Fiber
Cement & Concrete Composites, 2020Co-Authors: Gyeongcheol Choe, Takafumi Noguchi, Viktor MechtcherineAbstract:Abstract Amorphous Metallic Fiber has higher tensile strength as well as corrosion and wear resistance than common, crystalline steel Fibers. Its utilization as reinforcement improves the crack resistance and flexural and tensile performance of concrete. In the study at hand, the tensile behavior of thin plate amorphous Metallic Fiber-reinforced cementitious composites (AFRCC) is compared with that of hooked steel Fiber-reinforced cementitious composites (HSFRCC) for both quasi-static and dynamic loading regimes. AFRCC exhibites a high stress distribution effect and higher tensile strength, strain capacity, and peak toughness than HSFRCC, but lower tensile toughness and lower dynamic increase factor values for tensile strength, strain capacity, and toughness.
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direct tensile behavior of amorphous Metallic Fiber reinforced cementitious composites effect of Fiber length Fiber volume fraction and strain rate
Composites Part B-engineering, 2019Co-Authors: Gyeongcheol Choe, Takafumi NoguchiAbstract:Abstract In this study, the effects of the Fiber length, Fiber volume fraction, and strain rate on amorphous Metallic Fiber-reinforced cementitious composites (AFRCCs) were investigated. The experimental results showed that the amorphous Metallic Fibers with a 30 mm length had excellent bonding performance with the matrix because of the rough Fiber surface, large specific surface area, and high aspect ratio under both static and high strain rate conditions. The Fibers, however, were not pulled out from the matrix and were subjected to fracture because the thin-plate shape of the Fibers was vulnerable to shear force. On the other hand, the amorphous Metallic Fibers with a 15 mm length exhibited decreased bonding efficiency with the matrix because of the low aspect ratio and the increased number of mixed Fibers, and the Fibers were pulled out from the matrix. As the Fiber length increased, the tensile strength, strain capacity, and tensile toughness increased because the stress dispersion effect increased alongside the increase in the internal binding force and the crosslinking reaction range inside the matrix. As for the dynamic increase factor (DIF), the amorphous Metallic Fibers with a 30 mm length exhibited fracture without being pulled out from the matrix. The amorphous Metallic Fibers with a 15 mm length, however, were pulled out from the matrix, thereby increasing the bonding efficiency of the Fiber-matrix interface that is affected by the strain rate. Therefore, it was found that AFRCC-L15 had a higher DIF for the tensile strength, strain capacity, and tensile toughness.
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effect of amorphous Metallic Fiber on mechanical properties of high strength concrete exposed to high temperature
Construction and Building Materials, 2019Co-Authors: Gyeongcheol Choe, Euichul HwangAbstract:Abstract This study experimentally examined the effect of amorphous Metallic Fiber on the mechanical properties of heated high-strength concrete with compressive strengths of 100 and 120 MPa. The mixing ratios of amorphous Metallic Fiber were 0.3 and 0.5 vol%. Polypropylene Fiber was added at the ratios of 0.15 and 0.25 vol% according to the compressive strength of concrete. Specimens were prepared at six levels depending on the compressive strength of concrete and the mixing condition of the Fiber. Specimens were heated up to the target temperatures of 100, 200, 300, 500, and 700 °C at the rate of 1 °C /min, and the respective compressive strength and elastic modulus were measured after 24 h cooling periods. The thermal expansion strain was experimentally measured while the specimen was heated (maximum temperature of 700 °C). The addition of amorphous Metallic Fiber can improve the degradation of compressive strength and elastic modulus of high-strength concrete (which was heated at temperatures above 300 °C). This effect could be confirmed by measurements of the thermal expansion and the peak strains. The addition of amorphous Metallic Fiber was effective in suppressing cracks that occurred owing to the expansion of aggregate and the shrinkage of cement paste.
J. -p. Won - One of the best experts on this subject based on the ideXlab platform.
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Shrinkage and corrosion resistance of amorphous Metallic-Fiber-reinforced cement composites
Composite Structures, 2014Co-Authors: Se Jin Choi, Byung Tak Hong, Su-jin Lee, J. -p. WonAbstract:This study evaluated the corrosion resistance and plastic shrinkage control properties of amorphous Metallic Fiber used to reinforce cement composites. Amorphous Metallic Fibers, based on amorphous metals, are typically thin and are believed to be highly corrosion resistant. After exposing amorphous Metallic Fibers to five different types of degradation environments for 30, 60, and 90. days, a tensile test was conducted to evaluate corrosion resistance and reduction in tensile strength. Also, a plastic shrinkage crack test of amorphous Metallic-Fiber-reinforced cement composite was carried out, and comparisons were made with conventional steel-, polypropylene-, and polyvinyl-alcohol-Fiber-reinforced cement composites. Test results show that amorphous Metallic Fibers displayed higher corrosion resistance than did steel in every degradation environment, and plastic shrinkage crack control performance was excellent. © 2013 Elsevier Ltd.
Takafumi Noguchi - One of the best experts on this subject based on the ideXlab platform.
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effects of strain rate on the tensile behavior of cementitious composites made with amorphous Metallic Fiber
Cement & Concrete Composites, 2020Co-Authors: Gyeongcheol Choe, Takafumi Noguchi, Viktor MechtcherineAbstract:Abstract Amorphous Metallic Fiber has higher tensile strength as well as corrosion and wear resistance than common, crystalline steel Fibers. Its utilization as reinforcement improves the crack resistance and flexural and tensile performance of concrete. In the study at hand, the tensile behavior of thin plate amorphous Metallic Fiber-reinforced cementitious composites (AFRCC) is compared with that of hooked steel Fiber-reinforced cementitious composites (HSFRCC) for both quasi-static and dynamic loading regimes. AFRCC exhibites a high stress distribution effect and higher tensile strength, strain capacity, and peak toughness than HSFRCC, but lower tensile toughness and lower dynamic increase factor values for tensile strength, strain capacity, and toughness.
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direct tensile behavior of amorphous Metallic Fiber reinforced cementitious composites effect of Fiber length Fiber volume fraction and strain rate
Composites Part B-engineering, 2019Co-Authors: Gyeongcheol Choe, Takafumi NoguchiAbstract:Abstract In this study, the effects of the Fiber length, Fiber volume fraction, and strain rate on amorphous Metallic Fiber-reinforced cementitious composites (AFRCCs) were investigated. The experimental results showed that the amorphous Metallic Fibers with a 30 mm length had excellent bonding performance with the matrix because of the rough Fiber surface, large specific surface area, and high aspect ratio under both static and high strain rate conditions. The Fibers, however, were not pulled out from the matrix and were subjected to fracture because the thin-plate shape of the Fibers was vulnerable to shear force. On the other hand, the amorphous Metallic Fibers with a 15 mm length exhibited decreased bonding efficiency with the matrix because of the low aspect ratio and the increased number of mixed Fibers, and the Fibers were pulled out from the matrix. As the Fiber length increased, the tensile strength, strain capacity, and tensile toughness increased because the stress dispersion effect increased alongside the increase in the internal binding force and the crosslinking reaction range inside the matrix. As for the dynamic increase factor (DIF), the amorphous Metallic Fibers with a 30 mm length exhibited fracture without being pulled out from the matrix. The amorphous Metallic Fibers with a 15 mm length, however, were pulled out from the matrix, thereby increasing the bonding efficiency of the Fiber-matrix interface that is affected by the strain rate. Therefore, it was found that AFRCC-L15 had a higher DIF for the tensile strength, strain capacity, and tensile toughness.