Evaluation on Temperature History and Residual Compressive Strength of Heated Ultra High Strength Concrete Column according to the Fine Aggregate Type

가열을 받은 초고강도 콘크리트 기둥부재의 잔골재 종류에 따른 내부온도이력 및 잔존압축강도 평가

The strength of ultra-high-strength concrete can be reduced even if the spalling is prevented at a high temperature. Therefore, in this study, we measured internal temperature history and residual compressive strength using a 300×300×450mm short column specimens which use the fiber(NY 0.15+PP 0.10+SF 0.30vol·%) and respectively silica sand, washed sand, the slag sand. As a result, the temperature history and residual compressive strength are almost similar regardless of the fine aggregate types.