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水泥基材料氯离子固化性能研究现状

Research Status of Chloride Ion Curing Performance of Cement-based Materials

  • 摘要: 氯离子可导致钢筋锈蚀,直接影响混凝土耐久性。研究水泥基材料的氯结合能力对混凝土结构耐久性预测具有重要意义。本文总结了国内外在水泥基材料氯离子固化方面的研究,包括水泥矿物组成、矿物外掺料、环境因素等对氯离子固化效果的影响,同时阐述了目前混凝土中氯离子含量的测试方法。在此基础上,总结国内外研究现状,得出以下结论:矿物掺合料的加入以及水泥熟料中的不同成分都会影响水泥基材料对氯离子固化效果,但对其具体的固化机理,目前还没有统一的结论;国内外对混凝土氯离子固化做了大量的研究工作,但往往偏重于单一因素研究,缺少对氯离子阻迁性能及钢筋锈蚀等因素的综合研究。

     

    Abstract: Chloride ions can cause corrosion of steel bars and directly affect the durability of concrete. Studying the chlorine binding capacity of cement-based materials is of great significance to the prediction of the durability of concrete structures. The paper summarizes the researches on the chloride ion curing of cement-based materials at home and abroad, including the influence of cement mineral composition, mineral admixtures, and environmental factors on the effect of chloride ion curing. At the same time, it explains the current testing methods of chloride ion content in concrete. On this basis, the research status at home and abroad is summarized, and the following conclusions are drawn: A lot of research works have been done on chloride ion curing of concrete at home and abroad, but the researches tend to focus on single factor research, lack the comprehensive research on the chloride ion migration performance and steel corrosion.

     

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