Corrosion of reinforcement in a mixture of limestone-clay and perlite based blended concrete

Abstract

This paper reports the results of experiments evaluating the corrosion resistance of a mixture of limestone-clay (MLC) and perlite in concrete mixes. Variables were MLC and perlite additions of 0–15% as cement replacement and cement contents. Electrochemical measurements tests were used to monitor the corrosive behaviour of embedded steel bars in concretes. Results showed that additions of MLC and perlite are effective in inhibiting corrosion of reinforcing bars. The superior performance in inhibiting corrosion in reinforcing steel is attributable to the densification of the cement-paste matrix due to pozzolanic action in the additives concrete mixes.