低热硅酸盐水泥水化及性能研究现状

摘要/Abstract

摘要： 低热硅酸盐水泥因水化热低而被大量应用于高等级大体积混凝土工程以降低温度应力给结构带来的开裂风险。此外,高温下强度增长稳定的特点决定其能在高热施工环境发挥作用,优良的体积稳定性有利于解决混凝土结构开裂问题,较高的后期强度和优良的抗侵蚀性能适合用于高性能混凝土的制备。本文从水化、性能等角度出发,分析了低热硅酸盐水泥在水化调控、水化产物及微观结构、性能优化等方面存在的部分问题,总结了低热硅酸盐水泥高温耐受、抗侵蚀、体积稳定等性能特点,提出了低热硅酸盐水泥在严酷环境、高热环境中的应用展望。

关键词: 低热硅酸盐水泥, 硅酸二钙, 水化, 耐久性, 抗裂性能

Abstract: Low-heat Portland cement is widely accepted in high-grade mass concrete projects for its low hydration heat to reduce the risk of structural cracking caused by thermal stresses. In addition, the stability of strength growth under high temperature determines that it can be used in high temperature engineering environment. Competent volume stability is beneficial to solving the problem of concrete structure cracking. High late-strength and corrosion resistance are suitable for the production and application of high-performance concrete. In this paper, some keypoints of low-heat Portland cement in hydration control, hydration products, microstructure and performance optimization were analyzed from the aspects of hydration process and performance characteristics. The performance characteristics of low-heat Portland cement such as hydrating stably in high temperature environment, corrosion resistance and volume stability were summarized, and the new application prospect of low-heat Portland cement in extreme environment and high heat environment was put forward.

Key words: low-heat Portland cement, dicalcium silicate, hydration, durability, crack resistance

中图分类号:

TQ172.1

沈鑫, 郭随华, 李文伟, 陆超, 张坤悦, 王敏, 文寨军. 低热硅酸盐水泥水化及性能研究现状[J]. 硅酸盐通报, 2023, 42(2): 383-392.

SHEN Xin, GUO Suihua, LI Wenwei, LU Chao, ZHANG Kunyue, WANG Min, WEN Zhaijun. Research Status on Hydration and Properties of Low-Heat Portland Cement[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(2): 383-392.

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