摘要
研究了不同掺量钢纤维、聚丙烯纤维对自密实活性粉末混凝土(RPC)力学性能的影响.结果表明:钢纤维的掺入提高了自密实RPC的抗压和抗折强度,尤其对抗折强度的提高非常明显,7 d抗折强度最大可提高95%,28 d抗折强度最大可提高73%;聚丙烯纤维可以提高自密实RPC 7 d抗折强度,最大可提高13%,但对抗压强度以及28 d抗折强度却起削弱作用;混杂纤维主要能提高自密实RPC的7 d抗折强度,最大可提高82%;纤维的掺加大都能降低自密实RPC的压折比,并提高其峰值荷载变形和断裂变形.
The mechanical properties of self-compacting reactive powder concrete（RPC） specimens with different volume fractions of steel fiber, polypropylene fiber were investigated. Test results show that steel fiber can have an appreciable increase in compressive strength and flexural strength, especially in fiexural strength and the maximum increases of 7 d and 28 d flexural strength are 95 % and 73% respectively. Addition of polypropylene fiber can increase 7 d flexural strength that can be increased by 13%mostly, but has adverse effect on compressive strength and 28 d flexural strength. The 7 d flexural strength of specimen with hybrid fiber can be increased by 82% mostly. The ratio of compressive to flexural strength of self-compacting RPC can be decreased and the deflection at maximum loads and breaks of self-compacting RPC can be increased whatever kind of fiber is added.
出处
《建筑材料学报》
EI
CAS
CSCD
2008年第5期522-527,共6页
Journal of Building Materials
关键词
钢纤维
聚丙烯纤维
混杂纤维
自密实RPC
强度
steel fiber
polypropylene fiber
hybrid fiber
self-compacting reactive powder concrete
strength
