Repair vulnerability of corrosion patch repairs at the steel intersection areas of reinforced concrete slabs influenced by harsh weather

Abstract

This paper aims at finding the effect of harsh weather on corrosion repair of reinforced concrete slabs at the rebar intersections. Concrete slabs were tested to get an insight into the existence of macro-cell phenomenon in the rehabilitated patches of the corroded reinforced concrete members and the durability of repairs under the coupled effect of high constant humidity and high temperature. The specimens were prepared having a total chloride concentration in mixing water as 3% and 5% by mass of binder and the intersection steel areas simulating the patch repairs that were kept uncontaminated. After two years of corrosion potential observations, the specimens were broken to find the gravimetric mass loss and to get the true picture of the corrosion of steel at the intersection of the repaired patches of reinforced concrete. © 2014 American Chemical Society.