碱-矿渣水泥砂浆的干缩特性  

Drying shrinkage characteristics of alkali-slag cement mortar

作　　者：陈科[1] 杨长辉[1] 潘群[1] 赵爽[1] 于泽东[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045

出　　处：《重庆大学学报（自然科学版）》2012年第5期64-68,共5页Journal of Chongqing University

基　　金：国际科技合作项目(2009DFR50450);中央高校基本科研业务费资助项目(CDJZR12130041)

摘　　要：从收缩可逆性的角度,通过测试标准干燥养护后再水养护的砂浆试件收缩值的变化情况,对碱-矿渣水泥砂浆的干缩特性进行了系统的研究。结果表明:碱-矿渣水泥砂浆的干缩明显大于同条件下普通水泥砂浆的干缩,水玻璃-矿渣水泥砂浆、NaOH-矿渣水泥砂浆14d干缩值分别为普通水泥砂浆的5.5倍和2.2倍;碱矿渣水泥砂浆干缩中绝大部分是不可逆的,标准干燥养护14d再水养护的水玻璃-矿渣水泥砂浆、NaOH-矿渣水泥砂浆不可逆收缩分别占总干缩的86%和68%。The drying shrinkage characteristics of alkali-slag cement mortar from the view of irreversibility are studied. It is found that the shrinkage of alkali-slag cement mortar water curing after drying is significantly greater than that of OPC mortar which is cured under the same conditions. The drying shrinkage （14 d） of alkali-slag cement mortar activated with NaOH solution and water glass is respectively 5.5 and 2. 2 times of those of OPC mortar. Moreover, the majority of drying shrinkage of alkali-slag cement mortar is irreversible, and the proportion of this part is up to 86%（activated with water glass） and 68^（activated with NaOH solution）.

关 键 词：碱-矿渣水泥砂浆 干缩 不可逆收缩 养护时间 

分 类 号：TU502[建筑科学—建筑技术科学]