Impact of Sulphates on Binding of Chlorides Associated with Different Cations

Abstract

Chloride Binding has a significant effect on the chloride transport process. It retards chloride ion penetration into concrete and prolongs the corrosion initiation time. Chloride deprives embedded steel of the corrosion protection normally developed in chloride-free cement environment. The current findings evaluates the chloride binding capacity of various cementitious materials namely OPC, Zeolite, Metakaolin Shale Power etc,.The binding of chlorides in hydration phases can lower the chloride concentration in the pore solution and reduce the rate of chloride diffusion as well as lower the free chloride concentration near the steel. This study helps to know the value of diffusion of chloride into cement paste which does not damage the protective layer of steel. In addition, it can help to analyse the risk of corrosion, thereby improving service life of Reinforced Concrete Structures.