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亚硝酸盐在混凝土结构中的阻锈作用(英文)

DOI: 10.7521/j.issn.0454-5648.2014.05.09

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Abstract:

在钢筋混凝土表面涂刷亚硝酸盐水溶液的条件下,基于Fick第二定律,建立了亚硝酸根离子在混凝土中的迁移模型,并通过测定亚硝酸根离子在混凝土内的渗透浓度验证了该模型的合理性。结果表明亚硝酸根离子在混凝土中具有良好的迁移能力;亚硝酸根离子的迁移作用使混凝土内钢筋表面的亚硝酸根离子浓度达到抑制钢筋腐蚀的有效摩尔比。依据Magge理论建立亚硝酸根离子的阻锈年限预测模型,并预测亚硝酸根离子保护钢筋的阻锈年限。

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