碱矿渣水泥修补材料黏结界面性能研究  

Study on bonding interface properties of alkali-activated slag cement using as repair material

作　　者：谭义 吴芳[1] 汪文文 陈梦竹 TAN Yi;WU Fang;WANG Wenwen;CHEN Mengzhu(College of Material Science and Engineering,Chongqing University,Chongqing 400045 China)

机构地区：[1]重庆大学材料科学与工程学院

出　　处：《混凝土》2019年第7期153-156,共4页Concrete

基　　金：十三五国家重点研发计划（2017YFB0309905-02）;中央高校基金（2017CDJZR）

摘　　要：碱矿渣水泥应用于修补材料具有快硬、早强、黏结性能优异等特点,研究了不同粗糙程度基底对碱矿渣修补砂浆黏结性能的影响,对黏结界面过渡区进行了微观测试分析.结果表明,碱矿渣水泥修补砂浆的黏结性能优异,相比水泥基修补材料,黏接面粗糙程度对碱矿渣修补砂浆界面弯拉强度的影响要小;碱矿渣修补材料新旧界面过渡区中,水泥基底的水化产物能和碱矿渣修补材料发生反应,生成低钙硅比的C-S-H凝胶,界面区结构得到优化,其黏结机理除机械咬合作用外,还存在化学键合作用。Alkali-activated slag cement(AASC)is applied to repair materials,which is characterized by fast hardening,early strength and excellent bonding properties.The influence of different roughness base on the bond performance of alkali slag repairing mortar is studied,and analyze the interfacial transition zone(ITZ)by microcosmic method.The results show that the bonding property of AASC repairing mortar is excellent,compared with the cement-based repair materials,the roughness of the bonding surface has little effect on the interfacial flexural-tensile strength of AASC repair mortar.In ITZ of new and old interface of AASC repair material,the hydration product of ordinary Portland-cement can react with AASC repair material to form as C-S-H gel with low calcium to silicon ratio,which improved the structure of ITZ.The bonding mechanism has the effect of chemical bonds besides mechanical occlusion.

关 键 词：碱矿渣水泥 修补材料 界面过渡区 黏结机理 

分 类 号：TU528.01[建筑科学—建筑技术科学]