PERFORMANCE OF GALVANIZED STEEL REBARS IN CONCRETE

摘要

In this experimental investigation, the performance of galvanized steel rebars was assessed for its use in construction. The corrosion control efficacy of galvanized steel reinforcement (rebars) and the influence of galvanization on mechanical properties of steel rebars were studied. The tests were conducted following the Indian / ASTM standards and procedures followed by earlier researchers. It was noticed that galvanization provides adequate sacrificial protection to steel rebars in the chemical resistance test, open circuit potential test, and macrocell corrosion test in the tested duration. The performance of the galvanized rebars was 1.75 to 2.60 times higher than the uncoated rebars in the highly accelerated electrochemical corrosion conditions. The bond strength values for galvanized rebars were similar when compared with uncoated rebars. Impact and adhesion test results also indicate that galvanized rebars comply with the codal requirements of Indian and ASTM Standards. The coating damage of 1% did not adversely influence the corrosion resistance properties of galvanized rebars.