基于交流阻抗技术的混凝土表层氯离子扩散性研究

摘要

A method based on AC impedance technology using active porous silver as electrode is put forward for measuring the chloride ion diffusivity on surface layer of concrete. The results show that the proposed method exhibits good ability to distinguish the chloride ion diffusivity on surface layer of concrete with different binding materials. Besides, the method has features of non-destructivity and short test time. The method can be used in in-situ measurement for chloride ion diffusivity on surface layer of concrete, which can provide key data for durability assessment of concrete structures.%采用以活性多孔银材料为电极的交流阻抗技术测试混凝土表层氯离子扩散性.结果表明,该方法对不同胶凝材料体系混凝土表层的氯离子扩散性区分较好,且测试过程无损、耗时短,可用于现场混凝土表层氯离子扩散性测试,从而为混凝土结构耐久性评估提供关键数据.