Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Performance of Hybrid Fiber Reinforced Concrete at Elevated High Temperature

고온에서 하이브리드 섬유보강 콘크리트의 성능

  • Won, Jong-Pil (Dept. of Civil and Environmental System Engineering, Konkuk University) ;
  • Park, Kyung-Hoon (Dept. of Civil and Environmental System Engineering, Konkuk University) ;
  • Park, Chan-Gi (Dept. of Rural Construction Engineering, Kongju National University)
  • 원종필 (건국대학교 사회환경시스템공학과) ;
  • 박경훈 (건국대학교 사회환경시스템공학과) ;
  • 박찬기 (공주대학교 지역건설공학)
  • Published : 2008.06.30
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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 400$^{\circ}C$, 600$^{\circ}C$, 800$^{\circ}C$ and 1,200$^{\circ}C$ 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 $600\sim800^{\circ}C$.

본 연구에서는 강섬유와 서로 다른 직경 및 길이를 가진 폴리프로필렌섬유를 혼합한 하이브리드 섬유보강 콘크리트의 압축강도, 수축균열 및 고온에서 화재저항성을 평가하였다. 압축강도, 쪼갬인장강도, 휨시험 및 수축균열저항성을 평가하기 위하여 실시하였으며 또한 400$^{\circ}C$, 600$^{\circ}C$, 800$^{\circ}C$ 및 1,200$^{\circ}C$에 노출 후 물리 역학정 특성을 평가하기 위하여 표면관찰, 질량손실 및 잔류압축강도 시험을 실시하였다. 시험 결과 하이브리드 섬유보강 콘크리트는 역학적 성능, 수축균열저항성 및 화재저항성을 향상시켰으며 온도 변화에 따른 콘크리트의 성능 저하는 온도가 $600\sim800^{\circ}C$의 범위일 때 가장 컸다.

Keywords

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