Combined impact of carbonation and crack width on the Chloride Penetration and Corrosion Resistance of Concrete Structures

Chloride-induced corrosion of steel rebar embedded in concrete is one the major concerns influencing durability reinforced structures. It widely recognized that carbonation affects chloride diffusivity and accelerates chloride-induced reinforcement corrosion. The service load-related cracks also have a dominant influence on This study aims to investigate potential impact penetration resistance, rate corrosion, RC structures subjected service-related cracks, which not yet fully understood within literature. experimental programme involves casting prisms (100 × 100 500 mm) with different water-cement ratios 0.4, 0.5 0.6 four crack width ranges (0, 0.05–0.15 mm, 0.15–0.25 mm 0.25–0.35 mm), developed through flexural loading prisms. These samples were exposed initially accelerated carbon dioxide (CO2) environment then environment. Carbonation depth, penetration, degree (using half-cell linear polarization resistance) experimentally measured. results indicated (i): depth increases increase w/c ratio, (ii) concentration profile significantly due (iii) resistance when carbonated are relative uncarbonated samples.