Electrochemical chloride extraction: Efficiency and impact on concrete containing 1% of NaCl

This paper aims to evaluate the efficiency of the electrochemical chloride extraction technique and its impact in concrete contaminated with 1% of chloride by monitoring chloride content, specific porosity, water absorption and corrosion potential, verifying the influence of variables reinforcement cover (1.0 and 3.0 cm) and water/cement ratio (0.43 and 0.59). Results show that the concrete needs additional protection after chlorides extraction in order to prevent recontamination, since the porosity of the concrete increases with the application of the electrochemical chloride extraction. Average pore diameter increased 78% and 42% for concretes with w/c of 0.59 and 0.43, allowing the ingress of aggressive agents.