硅酸盐学报

冻融循环下混凝土中氯离子传输研究进展

作者：姜文镪1 2 刘清风1 2

单位：(1. 上海交通大学海洋工程国家重点实验室上海 200240 2. 大连理工大学工业装备结构分析国家重点实验室辽宁大连 116023)

分类号：TU528

出版年,卷(期):页码：2020,48(2):0-0

DOI：

摘要：

钢筋混凝土结构遭受氯盐侵蚀和冻融循环的共同作用时，其耐久性能会迅速降低。本文针对冻融循环下混凝土中氯离子传输过程，从混凝土物理性能、氯离子传输性能和保护措施3个方面总结相关研究成果。冻融循环过程中混凝土损伤分为两个阶段，两阶段损伤理论可以较好描述冻融损伤初始和扩散阶段。结合实验可量化氯盐侵蚀和冻融循环双重作用下混凝土的损伤程度，冻融损伤和氯离子扩散系数之间的关系能够有效描述冻融循环对氯离子传输的加速效应，以此为基础可探究各影响因素对冻融循环下混凝土中氯离子传输性能的影响。但是目前的研究结果、规律多为实验室条件下获得，对于定量评估实际混凝土结构的寿命仍有局限性。最后介绍了3种常见的防护方法，分别是表面处理、电化学修复/防护技术以及添加掺合料，并对未来该领域的发展方向从实验、理论和模型三方面进行展望。

基金项目：

国家自然科学基金项目(51978396)；中国科协青年人才托举计划(2018QNRC001)项目；上海市“青年科技启明星计划” (19QA1404700)项目。

作者简介：

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