加载龄期和养护温度对高性能混凝土早期拉伸徐变的影响  

Influences of Initial Loading Age and Curing Temperature on Tensile Creep of High Performance Concrete at Early Age

作　　者：杨杨[1] 吴炎平[1] 李鹏[1] 许四法[1] 

机构地区：[1]浙江工业大学建筑工程学院,杭州310032

出　　处：《混凝土与水泥制品》2010年第4期10-14,共5页China Concrete and Cement Products

基　　金：国家自然科学基金资助项目(50979098)

摘　　要：以水灰比为0.3的高性能混凝土为研究对象,通过对作者所设计的早龄期拉伸徐变装置的改进,对处于20℃和35℃条件下的混凝土拉伸徐变特性进行了实验研究,探讨了加载龄期和养护温度对早龄期高性能混凝土拉伸徐变的影响。结果表明:早龄期混凝土的徐变随着加荷龄期的增大而显著减少,养护温度的提高更加剧了这一现象的发生,并且随着养护温度的提高,拉伸徐变呈递减趋势。The behaviors of tensile creep of high performance concrete with water-binder ratio of 0.3 under curing temperatures of 20℃ and 35℃ at early ages are experimentally investigated by improving the set of testing apparatus designed by author,and the effects of initial loading ages and curing temperatures on tensile creep behavior are discussed.The results show that tensile creep strain of earlyage concrete decreases as the loading age and curing temperature increases.

关 键 词：拉伸徐变 高性能混凝土 早龄期 加载龄期 养护温度 

分 类 号：TU528[建筑科学—建筑技术科学]