摘要
以机制砂水泥砂浆为研究对象,探讨了机制砂中石粉含量、聚丙烯纤维掺量对水泥砂浆干缩性能的影响.在分析石粉含量分别为0%,7.9%,10%,15%,20%,25%和30%时的影响并确定最佳含量的基础上,考虑聚丙烯纤维掺量分别为0.6,0.8,1.0,1.2 kg/m3及纤维长度分别为6,12,18 mm时,研究了聚丙烯纤维对机制砂水泥砂浆干缩性能的改善效果.结果表明,掺入1.2 kg/m3、长度18 mm的聚丙烯纤维可以有效减小机制砂水泥砂浆的干缩值.
Experiments were carried out to study the dry-shrinkage of cement mortar with machine-made sand affected by the contents of stone powder and polypropylene fiber. On the basis of the optimal stone powder content determined after analyzing influences of the stone powder content as 0% , 7.9% , 10% , 15% , 20% , 25% , 30% mass of machine-made sand, the mass contents of polypropyl-ene fiber as 0. 6 kg/m^3, 0. 8 kg/m^3, 1.0 kg/m^3, 1.2 kg/m^3 with lengths of 6 mm, 12 mm, 18 mm respectively were considered to study its reducing effect on the dry-shrinkage of cement mortar with machine-made sand. The results show that the dry-shrinkage of ce-ment mortar with machine-made sand can be effectively reduced by admixing the mass content of polypropyleue fiber as 1.2 kg/m^3 with length of 18 mm.
出处
《华北水利水电大学学报（自然科学版）》
2014年第1期17-21,共5页
Journal of North China University of Water Resources and Electric Power：Natural Science Edition
基金
生态建筑材料与结构工程河南省高校科技创新团队科研课题(13IRTSTHN002)
新型城镇建筑技术河南省协同创新中心科研课题(教科技〔2013〕638号)
华北水利水电学院研究生教育创新课题(YK2012-05)
关键词
水泥砂浆
机制砂
聚丙烯纤维
干缩
cement mortar
machine-made sand
polypropylene fiber
dry-shrinkage
