Deterioration of reinforced concrete repair mortar layers

Abstract

A large number of repaired structures indicate that the rehabilitated reinforced concrete structures can suffer further corrosion. This problem should be considered by the design of rehabilitation and by the selection of the repair material. Since the thickness of the mortar cover over the reinforcing bar is about 20-50 mm, the resistance against the effect of the volume expansion due to steel corrosion cannot be neglected. The aim of our experiment was to investigate the deterioration mechanism of repaired reinforced concrete structures caused by corrosion of the reinforcing bar. We maintained corrosion defects in repairs to occur in four different ways, among them the crack trapping mechanism seems to be the less damaging.