Abstract
Electrochemical chloride extraction (ECE) is becoming a common method for repairing reinforced concrete structures exposed to marine environments, and the development of more efficient and durable anode materials is important. Therefore, this study designed a polymer-modified sulphoaluminate cement-based mortar (PSCM) as an anode for ECE, which can effectively remove chloride ions and repair damaged concrete. The results show that the PSCM, prepared using sulphoaluminate cement as the main cementitious material with 2% ethylene–vinyl acetate (EVA) and 0.6% carbon fibre as additives, possessed strong bond performance, high conductivity, and good repair function. In addition, the chloride removal efficiency was improved to 58.9%, when the PSCM was used as an ECE anode. The grid-like PSCM anode arrangement and stainless steel mesh/PSCM double-anode arrangement could overcome the shortcoming of chloride ion enrichment between the concrete and PSCM anode, and the chloride removal efficiency could reach 64.3%.
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