The effect of Rice husk ash (RHA) additions on corrosion of steel in OPC mortars in chloride environments

Abstract

The effect of rice husk ash (RHA) addition on the corrosion of steel in ordinary Portland cement (OPC) mortars was studied. RHA was prepared from the rice husk that is a waste material in the rice producing countries. The rice husk was fired at 500 °C for 5 hours. The XRD analyses of the ash shows it to be amorphous silica (87%) with a blain specific gravity of 2.57.