混凝土硫酸盐侵蚀理论模型的研究现状及展望

Recent Development on Theoretical Models of Sulfate Attack on Concrete

综合评述了混凝土硫酸盐侵蚀理论模型的研究进展。首先总结了混凝土受硫酸盐侵蚀的劣化机理及存在的争议问题,着重介绍了两类硫酸盐侵蚀理论模型的最新研究进展,包括离子扩散反应,材料初始裂缝的影响,水泥石微观结构改变以及材料损伤演化等问题。对各模型的理论基础、适用条件及存在的不足进行了分析,并提出了硫酸盐侵蚀建模中需要考虑的关键问题。最后,对硫酸盐侵蚀理论模型今后的研究重点进行了展望。

Research on the recent development on theoretical models of sulfate attack on concrete is reviewed. The mechanism of sulfate attack on concrete and some controversial questions are first discussed. Some issues （i. e. , diffusion-reaction of ions, effect of initial cracks on ions diffusion, mierostrueture change of cement stone and the damage evolution of materials） of the latest developments about two kinds of sulfate attack models are introduced. In addition, the theoretical basis, applicable condition and the deficiency of the models are analyzed, and some key points about setting up the models are also proposed. Finally, some suggestions for future investigations are made.