Influence of Mineral Admixtures on the Electrochemical Realkalization of Carbonated Concrete

Abstract

This paper presents the results of research on the electrochemical realkalization (ER) of carbonated concrete with fly ash and slag. The results show that the realkalization depth in concrete increases with an increase in the fly ash content and slag content. The carbonation resistance of realkalized concrete is lower than that of unrealkalized concrete and decreases with an increase in the fly ash and slag content in the concrete. The influence of fly ash on carbonation resistance is similar to that of slag. The maximum shear stress between the carbonated concrete and rebar decreases with an increase in the mineral admixtures regardless of realkalization or unrealkalization, and the influence of the fly ash on the bond behavior is greater than that of the slag.