The Relationship between Rebar Corrosion and Neutralization in the Concrete Containing Chloride

Abstract

This paper deals with the influence of neutralization depth of concrete on rebar corrosion occuring in concrete structures containing chlorides such as those found in sea sand. First, while investigating the relationship between rebar corrosion and the depth of neutralization by conducting an accelerated neutralization test on concrete into which chlorides were mixed in, surface analysis by means of an EPMA was conducted for chlorine and sulfur for a concrete cross-section. Based on the findings, this paper elucidates that rebar corrosion is initiated before neutralization reaches the surface of the reinforcing bars, because, when neutralization of concrete containing chlorides advances, it causes enrichment of chlorides to move toward the non-neutralized zone