Investigating the effects of anti-corrosive coatings on the bond between corrosion-damaged rebar and concrete repair materials

Reinforcement corrosion causes destruction to the steel by a loss in cross section and rib height, which can affect bond between concrete. During repair of corrosion-damaged reinforced concrete members, protective coating is usually applied cleaned corroded steel. There is, however, little information available on performance coatings. Furthermore, effect their thickness other parameters like rebar diameter, degree material properties are not well understood when considered parallel with This paper seeks contribute towards understanding use anti-corrosive coatings influence reinforcement materials, used combination different bar geometries at varying degrees damage. In this investigation, two high tensile bars, Y12 Y16, were considered. Rebar damage levels 0%, 10% 20% (of mass loss) simulated mechanical grinding sound samples represent condition rebar. A commercially epoxy-modified, cementitious was one or coats, each coat being 0.6 mm thick. Three materials CEM I 52.5N study, included w/b ratio 0.45 mortars ratios 0.47 0.65. Pull-out testing conducted 108 specimens, results analysed means one-way ANOVA test assess mainly bond. The indicate applying does significantly reduce for M65 C45 mixes. difference coats had all