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采用干湿交替方式研究了粉煤灰混凝土的氯离子结合性能,得到了混凝土中自由氯离子含量和总氯离子含量的分布,探讨了粉煤灰对氯离子结合性能的影响,分析了氯离子结合性能随深度的变化规律.结果表明:粉煤灰的掺入提高了混凝土中的结合氯离子含量,但粉煤灰混凝土的氯离子结合率和相对氯离子结合系数均低于未掺粉煤灰混凝土,且两者均随着粉煤灰掺量的增加呈降低趋势;混凝土中结合氯离子含量随深度的增加呈先降低再升高的趋势;氯离子结合能力随深度的增加呈上升趋势并逐渐趋于平稳.
Chloride ion incorporation performance of fly ash concrete was studied by alternating wet and dry method. Free chloride ion and total chloride ion content in concrete were obtained. The effect of fly ash on chloride ion binding property was discussed. Chloride ion The results showed that the incorporation of fly ash increased the content of chloride ion in concrete, but the chloride ion binding rate and the relative chloride ion binding coefficient of fly ash concrete were lower than that of non-pulverized coal Ash concrete, and both decreased with the increase of fly ash content. The content of chloride ion in concrete decreased first and then increased with the increase of depth, and the chloride ion binding capacity increased with the increase of depth And gradually tends to be stable.