养护温度对高强混凝土自收缩应变和应力的影响  

Influence of curing temperature on autogenous shrinkage strain and stress of high strength concrete

作　　者：吴伟松[1] 杨杨[1] 许四法[1] 蔡其茅[1] 余春春[1] 

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310014

出　　处：《新型建筑材料》2009年第7期52-54,共3页New Building Materials

摘　　要：通过对自由状态下高强混凝土自收缩应变和约束状态下自收缩应力的试验,考察分析了养护温度和水灰比对高强混凝土力学性能、自收缩应变和应力的影响。结果表明,养护温度越高,自收缩应变和应力的发展速度越快,其数值也越大;水灰比越大,养护温度对自收缩应力的影响越强;自收缩应力的发展速度小于自收缩应变的发展速度。The behavior of autogenous shrinkage strain and stress of high strength concrete under free state and under restrained state respectively were investigated experimentally in this paper, and the influence of curing temperature and water-cement ratio on autogenous shrinkage strain and stress was discussed. The results showed that the higher curing temperature, the faster development of autogenous shrinkage strain and stress, and the higher the value; the higher the water-cement ratio,the more significant influence of curing temperature on the stress, and autogenous shrinkage strain developed more rapidly than autogenous shrinkage stress.

关 键 词：高强混凝土 自收缩应变 约束应力 养护温度 

分 类 号：TU528.31[建筑科学—建筑技术科学]