Effect of silica fume on the chloride and sulphate attack of sulphate resisting and high alumina cement composite

The present investigation aims to study the chloride as well as sulphate attack on the composite of 85\% SRC and 15\% HAC. The effect of substitution of HAC with silica fume on the aggressive attack was also studied. The results indicate that the free lime contents decrease with silica fume and curing time in sulphate as well as chloride solution. The XRD results are in a good agreement with the compressive strength and chemical analysis. The substitution of HAC with SF improves the attack of chloride and sulphate ions on cement pastes. It can be concluded that superplastecizer must be added to the silica fume blended cements.