内养护对混凝土收缩开裂性能的影响  

Effects of internal curing on shrinkage and cracking of concrete

作　　者：何真[1] 陈衍[1] 梁文泉[1] 杨华全[2] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]长江水利委员会长江科学院,湖北武汉430072

出　　处：《新型建筑材料》2008年第8期7-11,共5页New Building Materials

基　　金：国家自然科学基金重点项目(50539010);水利部水工程安全与病害防治工程技术研究中心开放研究基金(S0707)

摘　　要：通过对使用高吸水材料的混凝土试件的早期自收缩、长期干燥收缩及椭圆环约束开裂试验,探讨混凝土内养护措施对改善混凝土收缩开裂性能的影响。同时考察了内养护对混凝土强度及抗冻性能的影响。试验结果表明,在有矿物外加剂的情况下,该内养护剂可有效地改善混凝土的自收缩和干燥收缩,混凝土的抗开裂性能得到提高,同时一定程度上改善了混凝土强度及抗冻性能。The effects of internal curing on shrinkage and cracking of concrete were investigated by early-age autogenous shrinkage,long-term drying shrinkage and the ellipse ring restrained tests on concrete test specimen which use super-absorbent materials. The effects of internal curing on strength and freezing resistance of concrete were also studied. The test results indicate that, in combination with mineral admixture,the internal curing admixture can effectively improve the autogenous shrinkage and drying shrinkage of concrete and its anti-cracking ability is also improved,at the same time the strength and freezing resistance of concrete are improved to a certain extend.

关 键 词：内养护 混凝土 收缩 早期开裂 矿物外加剂 

分 类 号：TU528[建筑科学—建筑技术科学]