EFFECT OF SURFACE TREATMENT METHOD APPLIED TO AN EXISTING RC STRUCTURE WITH WATER SUPPLIED FROM THE BACK ON THE CORROSIVE ENVIRONMENT OF REBAR

Abstract

 The purpose of this study was to understand the effect of the applied surface treatment method on the corrosion environment of rebar on an existing RC structure supplied with water from the back not in a severe corrosive environment. In order to evaluate corrosion possibility, electrochemical monitoring, moisture and chloride ion content were conducted using mortar specimens under various conditions. As a result, in the case without carbonation, low possibility of corrosion was confirmed regardless of the environment conditions and whether or not the surface coating was applied. On the other hand, in the case with carbonation, the corrosion suppression effect was different depending on the type of surface treatment. In addition, the corrosion suppression effect could not be confirmed for the case with surface coating regardless of the environmental conditions.