混凝土内养护研究进展  

Research Progress on Concrete Internal Curing

作　　者：邹定华[1] 朱建平[1] 廖建国[1] 

机构地区：[1]河南理工大学材料科学与工程学院,焦作454000

出　　处：《硅酸盐通报》2015年第5期1307-1311,共5页Bulletin of the Chinese Ceramic Society

基　　金：河南省高等学校矿业工程材料重点学科开放实验室开放基金资助项目(MEM13-02);河南理工大学博士基金项目(B2010-97)

摘　　要：以饱水多孔材料掺入混凝土,其所吸水分在毛细管压力差及浓度差的作用下向水泥浆体迁移,从而达到内养护的效果。内养护使高强(低水胶比)混凝土内湿相对湿度上升,抑制其内部的自干燥作用,促进未水化颗粒继续水化,从而降低其收缩或者使其产生膨胀,有效降低了混凝土的开裂风险。此外,内养护使界面过渡区在混凝土中所占体积比例减小,渗透性降低,耐久性得到提高。When saturated porous materials are added in concrete, water in it immigrates into paste, driving by the differences of capillary pressure and water concentration between paste of concrete and porous materials. This will cure the concrete internally. Internal curing increase the internal relative humidity of low water to cementitious ration （ W/C ） concrete, inhibit the self desiccation, enhance the hydration of unhydrated cement, and mitigate the shrinkage and cracking risk or make it expand. Moreover, volume fraction of interracial transition zone in concrete is reduced by internal curing, which decrease the permeability, and thus promote the durability of concrete.

关 键 词：混凝土 内养护 自收缩 耐久性 

分 类 号：TU528[建筑科学—建筑技术科学]