The Spalling Characteristics of High Strength Concrete with Fiber Content

섬유 혼입량에 따른 고강도 콘크리트 폭렬 특성

Recently, in order to reduce the spalling of high strength concrete under fire, the addition of organic fibres to high strength concrete has been investigated. In this study, the effect of organic fibre content on the spalling of high strength concrete was experimantally investigated. Two types of fibre, polypropylene(PP) and polyvinyl alcohol(PVA) fibres, were selected, and three water/binder ratios were selected, which were W/B $30\%,\;24.\%,\;and\;16\%$, respectively. As a result, it appears that as the concrete strength increases, the fiber content for prevention spalling increases. When W/B ratios are $30\%,\;24.9\%$, the additions of $0.1vol.\%$ and $0.2vol.\%$, respectively, appear to avoid the spalling in this study.