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服役于氯盐和硫酸盐耦合环境的钢筋混凝土结构,很容易因为氯盐和硫酸盐的侵蚀引起性能退化。本文从氯盐和硫酸盐的侵蚀机理出发,系统地分析了硫酸盐侵蚀造成混凝土损伤前后氯离子和硫酸根离子的扩散-结合过程。基于经典的扩散-反应模型以及化学-损伤-传输理论框架,详细阐述离子活度、环境温湿度、微观结构、钙溶蚀等因素对化学-损伤-传输体系的影响,并从热力学角度介绍了氯离子和硫酸根离子耦合传输的热力学模型。基于上述分析,对目前研究存在的问题进行了展望。
Abstract：Reinforced concrete structure in a chloride and sulfate coupling environment is vulnerable to be deteriorated due to the combined chloride-sulfate attack. Based on the attack mechanism of chloride and sulfate, this review analyzed the diffusion-binding process of chloride and sulfate ions before and after damage of concrete caused by sulfate attack. Based on the classical diffusion-reaction model and the chemo-damage-transport theoretical framework, the effects of ion activity, temperature,microstructure change and calcium leaching on the chemo-damage-transport system were represented. The coupled transport thermodynamic model of chloride ions and sulfate ions was introduced from the perspective of thermodynamics. In addition, some existing problems in the current research were also prospected.
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基本信息:
DOI：10.14062/j.issn.0454-5648.20210248
中图分类号:TU528
引用信息:
[1]王鹏刚,莫芮,隋晓萌,等.混凝土中氯盐-硫酸盐耦合侵蚀的化学-损伤-传输模型研究进展[J].硅酸盐学报,2022,50(02):512-521.DOI:10.14062/j.issn.0454-5648.20210248.
基金信息:
NSFC-山东联合基金项目(U1706222); 山东省重点研发计划项目(2019GSF110006); 山东省“双一流”建设工程-土木
2022-01-20
2022-01-20
2022-01-20