Internal Curing Using Water-releasing Material for High Strength Micro-expansive Concrete  

作　　者：吕林女 

机构地区：[1]School of Science,Wuhan University of Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2009年第3期510-513,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Project of National Natural Science Foundation (No. 50508034);Guangxi Key Laboratory for the Advance Materials and New Preparation Technology(No. 063006-5C-13)

摘　　要：Due to its low water content, it is difficult for expansive agent to have an effective expansive effect on high strength concrete to compensate its extensive shrinkage and form a certain expansion. To solve this problem, water-releasing material with water storage and releasing characteristics was incorporated into high strength micro-expansive concrete to provide internal curing, and expansive effect of expansive agent was improved. Migration of water from initially saturated water-releasing material to the surrounding hydrating cement paste was investigated. Based on a given efficient diffusion distance of water stored in water-releasing material, the mass and real water-cement ratio of cured cement paste were estimated. At the same time, the effect of internal curing of water-releasing material on the volume deformation of high strength micro-expansive concrete was investigated.Due to its low water content, it is difficult for expansive agent to have an effective expansive effect on high strength concrete to compensate its extensive shrinkage and form a certain expansion. To solve this problem, water-releasing material with water storage and releasing characteristics was incorporated into high strength micro-expansive concrete to provide internal curing, and expansive effect of expansive agent was improved. Migration of water from initially saturated water-releasing material to the surrounding hydrating cement paste was investigated. Based on a given efficient diffusion distance of water stored in water-releasing material, the mass and real water-cement ratio of cured cement paste were estimated. At the same time, the effect of internal curing of water-releasing material on the volume deformation of high strength micro-expansive concrete was investigated.

关 键 词：water-releasing material high strength concrete expansive internal curing 

分 类 号：TU528.0[建筑科学—建筑技术科学]