RESEARCH ON QUANTITATIVE EVALUATION OF EFFECT OF REPAIR TO REINFORCED CONCRETE DAMAGED BY CHLORIDE ATTACK

Abstract

It is necessary to quantitatively evaluate effect of repair works to deteriorated structures to do the effective maintenance management. A basic examination has been executed about the effect of repair for each method. However, due to lack of accumulation of actual data concerning re-deterioration after repairing, quantitative evaluation of the effect of repair is not realized yet. In this research, a calculation model to quantitatively evaluate the effect of repair works to concrete structures damaged by chloride attack was examined against surface protection method and patching method. Based on the actual data collected from existing concrete structures repaired by surface coating method or cross-section recovery method, chloride-preventive property of each coating material was analyzed to achieve quantitative evaluation of the effect of repair. Furthermore, the method of quantitatively evaluating the effect of repair was proposed to calculate chloride concentration inside repaired concrete structures.