减缩剂改性新老混凝土修补界面层的细观结构与粘结强度  

Fine Structure and Bond Strength of Shrinkage Reducing Admixture Modified Repair Interfacial Layer between New and Old Concrete

作　　者：罗白云[1] 熊光晶[1] 李庚英[1] 陈立强[1] 

机构地区：[1]汕头大学土木系,汕头515063

出　　处：《硅酸盐通报》2004年第6期110-112,116,共4页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金资助项目(50278050)

摘　　要：针对既有界面荆在新老混凝土修补中的缺点,以国产减缩剂对水泥砂浆界面剂进行改性,配制不同界面剂,分别时花岗岩石板和老砂浆界面进行修补,测试粘结强度,并观察细观结构。对比试验表明,减缩荆可有效改善界面层的宏观性能与细观结构,界面粘结强度显著提高。To counter the shortcomings of primers in common use for new to old concrete repair,a way to modify primer by introducing homemade shrinkage reducing agent (SRA) was proposed. Various primers were made and applied to granite and old mortar surfaces. Both bond strength test and fine structure observation of interfacial layer were performed. Test results showed that SRA effectively improved the both macrostructure and fine structure of interfacial layer,therefore,leading to a significant increase of the bond strength.

关 键 词：界面剂 减缩剂 新老混凝土 粘结强度 修补 细观结构 水泥砂浆 改性 界面层 配制 

分 类 号：TQ325[化学工程—合成树脂塑料工业] TU528[建筑科学—建筑技术科学]