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Title |
Performance of Hybrid Fiber Reinforced Concrete at Elevated High Temperature
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Keywords |
역학적 성능 ; 화재저항성 ; 하이브리드 섬유보강 콘크리트 ; 폴리프로필렌섬유 ; 강섬유 mechanical properties ; fire resistance ; hybrid fiber reinforced concrete ; polypropylene fiber ; steel fiber |
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Abstract |
This study evaluated the mechanical performance, shrinkage crack and fire resistance of hybrid fiber (blended steel and polypropylene fiber with different diameter and length) reinforced concrete at elevated temperature. The compressive, splitting tensile, flexural, plastic shrinkage test were conducted to the evaluate the mechanical properties and the resistance of shrinkage crack. Also, the surface investigation, reduction rate of mass and residual compressive test were performed to evaluate the physical and mechanical properties after 400oC, 600oC, 800oC and 1,200oC exposure. Test results showed that the hybrid fiber reinforced concrete improved the mechanical performance, shrinkage crack and fire resistance. The reduction of performance with a temperature change were high at the temperature of 600oC~800oC.
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