粉煤灰综合利用 2017N0.6 FLY ASH COMPREHENSIVE UTILIZATION 试验与应用 钢纤维及硅灰对UHPC性能影响试验研究 Experimental Study on the Influence of Steel Fiber and Silica Fume on the Properties of UHPC 徐俊，许永和，王圣怡 (上海建工集团股份有限公司，上海200080) 摘要：以超高性能混凝土(UHPC)为研究对象，探索钢纤维形状及硅灰掺量对其性能的影响规律.试验结果表明， 直线形钢纤维UHPC比端钩形钢纤维UHPC流动性能更优异，同时随着硅灰掺量的增加，UHPC流动性能逐渐变好而 后再变差，1d及28d抗折强度均呈现先增加后减小的趋势，1d及28d抗压强度均慢慢增加，但当硅灰掺量超过-一定 额度值时，对抗压强度的影响很小. 关键词：混凝土；超高性能；钢纤维；硅灰；性能研究 中图分类号：TU528.31 文献标识码：A文章编号：1005-8249(2017)06-0008-03 Xu Jun Xu Yonghe Wang Shengyi (Shanghai Construction Group Co. Lad..Shanghai 200080 China) Abstract:Taking Ultra-high performance concrete (UHPC)as the research object the influence of the shape of steel fiber and the proportion of silica fume on its performance was investigated in this paper.The test results show that the flowing property is more outstanding by using linear steel fiber than hooked steel fiber in UHPC.With the increasing proportion of silica fume the flowing property of UHPC gets better first and then worse Id and 28d rupture strength increases first and then decreases ld and 28d pression strength both increases slowly However when the proportion of silica fume exceeds a certain limit its influence on the pressive strength is quite small. Keywords:concrete;ultra-high performance;steel fiber;silica fume:performance study 现代建筑工程对混凝土质量要求越来越高，传 久性，抗压强度一般不低于150MPa 抗折强度可以 统混凝土普遍强度较低且耐久性不佳，难以适应当 到达40MPa2-3 日本、美国、澳大利亚等发达国家 前某些复杂或特殊工程的需要，因此混凝土的高性 已成功将超高性能混凝土应用于预制、现浇结构及 能化便成为现代混凝土技术发展的重要方向，通过 防渗漏装置之中，很好的解决了工...
钢纤维及硅灰对UHPC性能影响试验研究.pdf
