Numerical analysis on efficiency of electrochemical chloride extraction of one side anode in concrete.

Abstract Electrochemical Chloride Extraction (ECE) is one of the key ways to enhance the durability of concrete structure which suffered or are suffering from chloride attack. To deeply understand the influence of various factors on chlorine removal efficiency, this paper presents a numerical study to characterize transport and distribution of each ion during ECE. A plain concrete specimen was used as an example to investigate the influence of various factors on the efficiency of ECE of one side anode. These factors were: time, current density, ratio of cover thickness and side length, initial chloride ion concentration, and ratio of cross-sectional area of reinforcement to cross-sectional area of specimen. In addition, the quantitative relationship model between these factors and total electrochemical desalination efficiency are also proposed. Good agreement between the present the quantitative relationship model of total desalination efficiency and the FEM solution illustrates reliability and accuracy of the proposed relationship model. Highlights • ECE process efficiency of one side anode is discussed. • The influence of key factors on the efficiency of ECE is clarified. • The total ECE efficiency model are proposed. [ABSTRACT FROM AUTHOR]