In view of the high applicability of microsilica in corrosion protection of rebars in
concrete, in the present work, study has been carried out to evaluate the chloride
permeability in ordinary portland cement (OPC) and sulfate resistant cement (SRC)
blended with Elkem Microsilica Grade 920. The influence of addition of microsilica on
compressive strength of the concrete has also been studied. In order to study the
corrosion of rebars at the rebar/concrete interface open circuit potential (OCP)
measurement has been carried out. These results may explain the destruction process of
concrete in seawater and chloride ion environments. Also, it will establish the effect of
blending of concretes with microsilica, on corrosion control of rebars.