超细玻璃粉对水泥浆体反应特性的影响  

Effect of ultrafine glass powder on reaction characteristics of cement slurry

作　　者：王迎斌 宋钰莹[1] 贺行洋 李佳伟 苏英[1,2] WANG Yingbin;SONG Yuying;HE Xingyang;LI Jiawei;SU Ying(School of Civil Engineering and Environmental Sciences,Hubei University of Technology,Wuhan 430068,China;Building Waterproof Engineering and Technology Research Center of Hubei Province,Hubei University of Technology,Wuhan 430068,China)

机构地区：[1]湖北工业大学土木建筑与环境学院,湖北武汉430068 [2]湖北工业大学湖北省建筑防水工程技术研究中心,湖北武汉430068

出　　处：《新型建筑材料》2021年第10期24-29,共6页New Building Materials

基　　金：“十三五”国家重点研发计划项目(2019YFC1907104);国家自然科学基金项目(52008158)。

摘　　要：分别使用水和无水乙醇作为研磨介质,采用湿磨制备2种超细玻璃粉,并与干磨玻璃粉的粒径分布进行了对比。研究了超细玻璃粉等质量取代10%水泥对复合浆体的流变性能、收缩性能和砂浆力学性能的影响。结果表明:当研磨介质分别为水和无水乙醇时,可分别制得d50=2.71、0.32μm的超细玻璃粉。掺入超细玻璃粉的水泥浆体表现为剪切增稠行为。随着玻璃粉粒径的减小,复合水泥浆体的屈服应力、塑性黏度和化学收缩都逐渐增大。掺入d50=0.32μm超细玻璃粉的混凝土1、28 d抗压强度较对照组分别提高了95.6%、22.2%。In this paper,water and anhydrous ethanol were used as grinding media respectively to prepare two kinds of ultrafine glass powder by wet grinding,and the particle size distribution of glass powder was compared with that of dry grinding glass powder.The influence of superfine glass powder replacing cement with the same content(10%)on the rheological properties,shrinkage properties and mechanical properties of composite slurry was studied.The results show that the ultrafine glass powder with d50=2.71μm and 0.32μm can be prepared when the grinding medium is water and anhydrous ethanol,respectively.The cement slurry mixed with ultrafine glass powder exhibits shear thickening behavior.The yield stress and plastic viscosity of composite cement paste increase with the decreasing particle size of glass powder.The chemical shrinkage increases with the decrease of the particle size of the glass powder.Compared with the control group,the compressive strength of d50=0.32μm superfine glass powder group increased 95.6%and 22.2%at 1 d and 28 d,respectively.

关 键 词：超细玻璃粉 流变性能 收缩特性 力学性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]