A solution of sea sand as a sustainable fine aggregate: control harmful chloride ion by electric field force

High chloride ion concentration is the main obstacle to use sea sand as the fine aggregate for reinforced concrete structures. The chloride ion on the surface of sea sand mainly exists in the form of sodium chloride with electric field migration characteristics. This paper developed a solution of sea sand as a sustainable fine aggregate for chloride ion controlling by electric field force. The desorption mechanism of chloride ions in sea sand under electrical field force was discussed. The results showed that the chloride ion desorption process in sea sand is mainly divided into chloride salt dissolution and ion migration. The results not only support optimization of the sea sand desalination, but also help improve detection accuracy of chloride ion concentration in sea sand.