消泡剂对水性环氧树脂改性水泥砂浆的性能影响  

Effect of Defoamer on Properties of Waterborne Epoxy Modified Cement Mortar

作　　者：陈宗瑞 周阳[1,2] 李相国[1] CHEN Zong-rui;ZHOU Yang;LI Xiang-guo(State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;College of Water and Architectural Engineering,Shihezi University,Shihezi 832000,China)

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070 [2]石河子大学水利建筑工程学院,石河子832000

出　　处：《硅酸盐通报》2019年第4期1045-1049,1061,共6页Bulletin of the Chinese Ceramic Society

摘　　要：针对水性环氧树脂改性水泥砂浆存在含气量高、气孔多且大的问题,研究了消泡剂掺量对水性环氧树脂改性砂浆力学强度的影响并分析了水性环氧树脂改性砂浆孔结构与力学性能的关系。结果表明:磷酸三丁酯与有机硅消泡剂均能改善水性环氧树脂改性水泥砂浆的力学强度,且两种消泡剂具有协同增强作用;分析孔结构数据可知掺入消泡剂不仅能降低水性环氧树脂改性砂浆的孔隙率与孔径,还能优化孔径分布,减少有害孔、多害孔的数量。To solve the problem of high gas content and large pores in the waterborne epoxy resin modified cement mortar, the effect of defoamer addition on mechanical strength of waterborne epoxy resin modified mortar was studied and the relationship between the pore structure and mechanical properties of the waterborne epoxy resin modified mortar was analyzed.The results show that both tributyl phosphate and silicone defoamer can improve the mechanical properties of waterborne epoxy resin modified cement mortar. And two kinds of defoamer have synergistic effect. By analyzing the data of pore structure, the addition of defoamer can not only reduce the porosity and pore diameter of waterborne epoxy resin modified cement mortar, but also optimize the pore size distribution, reduce the number of harmful pores and more hazardous pores.

关 键 词：环氧树脂 聚合物改性砂浆 消泡剂 力学性能 孔结构 

分 类 号：TU528.01[建筑科学—建筑技术科学]