花岗岩石粉-高韧性水泥基复合材料的制备与性能  

Preparation and Properties of Granite Stone Powder-high Toughness Cementitious Composite

作　　者：任卫岗 庄一舟[1] 于丽雪 

机构地区：[1]福州大学土木工程学院,福州350108

出　　处：《科学技术与工程》2016年第17期269-274,共6页Science Technology and Engineering

基　　金：国家自然科学基金项目(51278126)资助

摘　　要：研究了掺花岗岩石粉的高韧性水泥基复合材料的基本力学性能。采用废弃花岗岩石粉部分取代磨细砂,制备具有不同石粉质量取代率的水泥砂浆;并对其进行抗压、抗折试验分析,得到最优的石粉取代率约为25%;在此最优石粉取代率的基础上配制出掺花岗岩石粉的高韧性水泥基复合材料;并研究聚乙烯醇（PVA）纤维体积掺量（0～1.5%）及其长径比（158～316）对混凝土复合材料基本力学性能的影响。研究结果表明,试验中,当花岗岩石粉掺量一定时（25%）,纤维体积掺量1.5%且长径比237时电镜扫描显示纤维与基体界面结合最紧密,力学性能最佳,此时的极限拉应变高达3.03%,约为普通水泥基材料的300倍。The mechanical properties of high toughness cementitious composite with granite stone powder partially incorporated were studied. Cement mortar was tested by partially mixing waste granite stone powder in different mass replacement rate to crushed fine sand and got an optimal powder replacement rate of 25% by comparing the test results of compression and bending. A kind of high toughness cementitious composite with the optimal replacement rate of granite stone powder was blended and the effect of polyvinyl alcohol（ PVA） fiber with different volume fraction（ 0 ~ 1. 5%） and different aspect of length to diameter（ 158 ~ 316） on mechanical properties was studied. Research results show that the FSEM displaying interface of fiber and matrix combined with the most closely,and the mechanical properties of the composite reach maximum along with its ultimate tensile strain of 3. 03%approximately 300 times the ordinary cement-based material in this research,when the fiber content is 1. 5% and the ratio of length to diameter is 237.

关 键 词：花岗岩石粉 取代率 磨细砂 聚乙烯醇纤维 高韧性水泥基复合材料 力学性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]