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Title |
Tensile Behavior of Ultra-High Performance Concrete According to Combination of Fibers
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Authors |
최정일(Jung-Il Choi) ; 고경택(Kyung-Taek Koh) ; 이방연(Bang-Yeon Lee) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2015.19.4.049 |
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Keywords |
균열강도 ; 섬유 조합 ; 인장 변형 성능 ; 인장강도 ; 초고성능 콘크리트 Cracking strength ; Fiber combination ; Tensile behavior ; Tensile strain capacity ; Tensile strength ; UHPC |
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Abstract |
Ultra-High Strength Concrete(UHPC) has ultra-high material performance including high strength and high flowability. On the other hand it is less ductile than high ductile fiber reinforced cementitious composite. This study investigated the effect of combination of steel fiber and micro fiber on the tensile behavior of UHPC. Four types of UHPC containing combination of steel fiber, polyethylene(PE), polyvinyl alcohol(PVA), and basalt fiber were designed. And then uniaxial tension tests were performed to evaluate the tensile behavior of UHPC according to combination of fibers. And density was measured to evaluate whether micro fiber induces unintentional high pore or not. From the test results, it was exhibited that PE fiber with high strength is effective to improve the tensile behavior of UHPC and basalt fiber is effective to increase the cracking and tensile strength of UHPC. Furthermore, it was also verified that micro fiber does not make high pore.
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