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Electrochemical chloride extraction (ECE) technology can effectively remove chloride ions inside concrete cover and can improve the durability of reinforced concrete (RC) structures. The distribution of chloride ion migration during ECE treatment should be studied further. This paper focused on two research topics. The first topic was how chloride ions became distributed from the electro migration over time, especially during short term ECE treatments. The second topic was how the chloride ions distributed along the depth of the concrete cover. A special ECE treatment device was designed to establish electric field of chloride removal in order to obtain desirable effects. It was found that the most efficient period of treatment occurred in the first few days. Thus, indoor experiments could be useful for determining the end time of ECE treatment. Also, relatively higher amounts of chloride ions in surface concrete were observed, and therefore, the long-term durability of concrete after ECE treatment should be examined.

Experimental Research on the Distribution of Chloride Ion Migration in Concrete Cover during Electrochemical Chloride Extraction Treatment