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Chemical titration method and lab-made chloride probes were jointly adopted to investigate the effects of water-to-cement (W/C) ratio and the impressed current density on chloride transport for cement-based materials during electrochemical chloride extraction (ECE) process.The dissolution of bound chlorides and the effect of current density on dissolution were analyzed.The variations of chloride concentration at different depths and the chloride transference process were monitored.Test results show that W/C ratios adopted have slight influence on chloride extraction,while chloride extraction efficiency is mainly determined by the impressed current density.During ECE process a portion of bound chloride ions dissolved and the amount of bound chlorides released is directly proportional to current density.
Chemical titration method and lab-made chloride probes were jointly adopted to investigate the effects of water-to-cement (W / C) ratio and the impressed current density on chloride transport for cement-based materials during electrochemical chloride extraction (ECE) process. The dissolution of bound chlorides and the effect of current density on dissolution were analyzed. Variations of chloride concentration at different depths and the chloride transference process were monitored. Test results show that W / C ratio adopted have slight influence on chloride extraction, while chloride extraction efficiency is mainly determined by the impressed current density. During ECE process a portion of bound chloride ion dissolved and the amount of bound chlorides released is directly proportional to current density.