考虑内养护剂动态释水的混凝土自干燥计算模型

Calculation Model of Concrete Self-desiccation Considering Dynamic Water Release of Internal Curing Agent

摘要:

基于毛细孔含水量变化的混凝土内部相对湿度理论计算模型，建立了考虑内养护剂动态释水的混凝土自干燥计算模型，并与试验结果进行对比.结果表明：该模型实现了对内养护剂动态释水过程的计算，且计算结果与试验结果吻合较好；混凝土强度越高，内养护对自干燥效应改善越显著；采用本模型精确分析可指导内养护混凝土配合比设计.

Abstract:

Based on the theoretical calculation model of concrete internal relative humidity changed with capillary water content in the cement paste， a calculation model of self-desiccation concrete considering the dynamic water release of internal curing agent was established and compared with the experimental results. The results show that the dynamic water release process of internal curing agent can be calculated by the model， and the calculated results are in good agreement with the experimental results. The higher the strength of concrete， the greater the improvement of self-desiccation effect by internal curing. The accurate analysis of the model can guide the mix proportion design of internal curing concrete.