High Strength Waterproof Concrete Using Various Admixtures

The use of silica fume had major impact on industries, ability to routinely and commercially produce silica fume modified concrete of flow able in nature but yet remain cohesive, which in turn produces high early and later age strength including resistant to aggressive environments. This study is an experiment on the nature of silica fume and its influences with waterproofing admixture on the properties of fresh concrete. As after adding waterproofing admixtures in the concrete, it reduces the compressive strength of the concrete. After partial replacement of cement by silica fume with an addition of waterproofing admixture the strength parameters of concrete have been studied. First the strength parameters of concrete without any partial replacement were studied then strength parameters by partial replacement with silica fume have been studied by placing cube on compression testing machine (CTM). Silica fume were used to replace 0% to 15% of cement by weight. The results showed that partial replacement of cement with silica fume had significant effect on the compressive strength of cube, Durability and Split Tensile Strength. The strength of concrete increases rapidly as we increases the silica fume content and the optimum value of compressive strength is obtained at 10% replacement. After 10% it starts decreasing under uniform load condition of 4 KN.