earticle

영어

This study describes the experimental study on the mechanical properties of fiber-reinforced concretes containing the three different fibers under the two different exposure temperatures (400oC and 600oC). For this study, jute, aramid and steel fibers were mixed with 0.25% of the constant fiber volume fraction of concrete. Test results shows that the addition of fibers to concrete does not seems to increase the compressive strength significantly when compare to those of plain concretes, and the residual compressive strengths of jute, aramid and steel-fiber reinforced concretes at 400℃were approximately 67.75%, 76.58% and 71.47%, and at 600℃ were approximately 28.63%, 29.84% and 33.97%, respectively. The addition of fibers to concrete does not seems to increase the compressive strength significantly when compare to those of plain concretes. The mass loss and elastic modulus of all fiber-reinforced concretes were decreased with the increased temperature, but the rate of decreasing is very similar.

한국어

이 연구는 각기 다른 세 가지 섬유를 혼합한 섬유보강콘크리트의 노출온도에 따른 물리적 성질에 대하여 연구하였다. 황마, 아라미드, 강섬유를 콘크리트 전체 용적의 0.25%의 일정한 양을 혼입하여 시험체를 제작하였다. 시험결과, 황마섬유보강콘크리트의 잔류 압축강도가 아라미드와 강섬유를 혼입한 보강콘크리트보다 낮게 나타났으나, 그 차이는 미미했다. 모든 섬유보강콘크리트의 중량손실과 탄성계수 또한 온도가 증가할수록 비슷한 감소율을 보이며 감소하였다.