低水胶比水泥基材料后续水化的研究进展

摘要/Abstract

摘要： 低水胶比水泥基材料的孔隙率低,力学性能、耐久性能和抗冲击性能优异。然而,低水胶比水泥基材料中的自由水含量低且可供水化产物沉淀的空间有限,限制了水泥颗粒的水化反应,导致其内部存在大量未反应的胶凝材料。本文阐述了水泥的后续水化过程及机理,综述了后续水化对低水胶比水泥基材料微观结构、体积稳定性和强度等方面影响的研究进展。最后对目前低水胶比水泥基材料后续水化研究中存在的一些问题进行了总结和展望,旨在为低水胶比水泥基材料的长期稳定性研究和应用提供理论依据。

关键词: 低水胶比, 后续水化, 水化机理, 微观结构, 体积稳定性, 强度

Abstract: Cement-based materials with low water-to-binder (W/B) ratio have low porosity, excellent mechanical properties, durability, and impact resistance. The hydration of cement particles are restrained by the limited free water and the confined space for the precipitation of hydration products, leading to a high amount of unhydrated cementitious materials. This paper illustrated the process and mechanism of subsequent hydration of cement, reviewed the effects of subsequent hydration on microstructure, volume stability and strength of cement-based materials with low W/B ratio. Finally, some issues associated with subsequent hydration were addressed and the prospects for future researches were put forward. It aims to lay a theoretical information for the study and application of long-term stability of cement-based materials with low W/B ratio.

Key words: low W/B ratio, subsequent hydration, hydration mechanism, microstructure, volume stability, strength

中图分类号:

TU528

李港来, 史才军, 吴泽媚, 李宁, 刘翼玮. 低水胶比水泥基材料后续水化的研究进展[J]. 硅酸盐通报, 2021, 40(10): 3316-3325.

LI Ganglai, SHI Caijun, WU Zemei, LI Ning, LIU Yiwei. An Overview on Subsequent Hydration of Cement-Based Materials with Low Water-to-Binder Ratio[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(10): 3316-3325.

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