水泥基界面剂粘结抗拉强度的研究  

Study on Adhesive Tensile Strength of Cement-based Interfacial Agents

作　　者：方萍[1] 黄政宇[1] 张瑞文 尚守平[1] 

机构地区：[1]湖南大学土木工程学院,长沙410082 [2]湖南省建筑设计院,长沙410011

出　　处：《材料导报（纳米与新材料专辑）》2008年第3期319-321,共3页

基　　金：中国工程建设标准化协会规程项目(2005)建标协字第14号;湖南省科技计划重点项目(06sk4057);交通部;湖南省交通厅科研基金资助项目(200514)

摘　　要：研究了超细水泥、硅粉和聚合物对水泥基界面剂粘结抗拉强度的影响,观测分析了加固砂浆和基层混凝土的界面处的微观结构。研究结果表明:硅粉能有效增强水泥基界面剂的粘结抗拉强度并控制干缩开裂;以超细硅酸盐水泥代替普通硅酸盐水泥,水泥基界面剂的粘结抗拉强度可提高60%;可再分散聚合物胶粉能明显提高水泥基界面剂的粘结抗拉强度。The influence of the superfine cement, silica fume and redispersible polymer powders on the adhesive tensile strength of interracial agents is studied, and the exploration of the microstructures of the interfacial zones between the new mortars and the old mortars is analyzed. The results show that silica fume can improve the interracial adhesive tensile strength and control the dry shrinkage cracks efficiently. The adhesive tensile strength can be raised up by 60% by using superfine Portland cement instead of ordinary Portland cement. Redispersible polymer powders can increase the adhesive tensile strength of cement-based interfacial agents obviously.

关 键 词：超细水泥 硅粉 可再分散聚合物胶粉 粘结抗拉强度 水泥基界面剂 

分 类 号：TU528.572[建筑科学—建筑技术科学] TU375