Recycling methodology of chloride-attacked concrete based on electrochemical treatment.

Recycled chloride-attacked aggregate concrete (RCAAC) requires special treatment to reduce the corrosion risk of the steel bars embedded in it. This paper proposes bidirectional electromigration (BIEM) rehabilitation as a recommended step to construct concrete components from RCAAC. The electrochemical parameters were investigated to obtain the highest chloride ion removal efficiency (CRE). An assembled laminated slab was then prepared as a case study of the possible application of the RCAAC. Results proved that the durability of assembled laminated slab was improved, the flexural capacity remained in an ideal state and the crack distribution characteristics did not change. This paper can provide a feasible method to solve the issue of concrete waste pollution during urbanization construction for islands or coastal cities. [Display omitted] • The chloride ion content can be effectively reduced to a practicable level after electrochemical treatment. • The electrochemical treatment applied curing period shows high efficiency of durability improvement. • The parameter optimization method considering electrochemical treatment efficiency and concrete performance is discussed. • The performance of assembled laminated slab remained in an ideal state after electrochemical treatment. [ABSTRACT FROM AUTHOR]