Study on Corrosion of Activated Fly Ash Concrete Beams

Abstract

Corrosion of main steel reinforcement is one of the major factors in flexural capacity reduction of reinforced concrete beam. Steel corrosion reduces the cross section area as well as the continuity of the surface of steel. Such reductions lower the tension strength of steel, bond strength due to a slip between steel and the surrounding concrete and, consequently deteriorate the member strength. Mineral admixture like fly ash can be used for enhancing passivity of concrete. The properties of fly ash can be improved by activation. The objective of the present investigation is to improve the quality of fly ash by chemical treatment and to study the corrosion resistance capacity of activated fly ash concrete. In this study, half cell potential of beams and weight loss due to corrosion are determined for activated fly ash concrete.