건설재료시공학연구실

Building material & construction lab.

Abstract
In a study of fire resistance of high-strength concrete, the effect of anti-spalling has been investigated by mixing various fibers. Even if spalling are prevented, strength of concrete is reduced due to chemicophysical property changes by high temperature. In this study, high strength concrete(W/B 20.0, 14.5, 12.5) is used. And high-temperature strength properties were evaluated under pre-loading condition. As a result, decrease in compressive strength due to high temperature becomes larger as the compressive strength increases, and residual rate of elastic modulus and compressive strength is high by the shrinkage caused by loading and thermal expansion due to high temperature are offset from each other, at a temperature above 500℃.