Journals Proceedings

Abstract

The influence of both de-agglomerated and as received nano silica (NS) on chloride ingress resistivity was investigated. Nineteen OPC/NS concrete mixes with different NS contents (0, 1, 2, 3, 4, 5, and 6% by mass of OPC) were prepared and then exposed to chlorides. Two types of water (magnetized water (MW) and Tap water (TW)) were used. Two cylinders of 75x150 mm were prepared from each concrete mix for measuring chloride profile along the cover zone and depth of chloride penetration into the cover zone. Results of this study showed that all the examined NS replacement levels can enhance resistivity of chloride ingress of OPC concrete providing using MW and magnetic stirring (MS) together in concrete fabrication. Replacing 3% cement by NS and using both MW and MS results in the most significant reduction in both % chloride penetration and % total chloride content as compared to normal control concrete.