Investigation of Strength Characteristics of Concrete with Partial Replacement of Cement by Silica Fume and Sand by Quarry Dust

Concrete is the most commonly used man-made material on earth. It is an important construction material used extensively in buildings, bridges, roads and dams. Its uses range from structural applications to pipes and drains. Concrete is a composite material, consisting mainly of cement, water and aggregate (fine and coarse). When these materials are mixed together, they form a workable paste which then gradually hardens over time. In engineering industry, the improvement of existing materials allows for technological advancement and the construction of more reliable structures without over design. The partial replacement is done in order to reduce the cement content, cost of materials and to overcome the scarcity of materials. In this project, we presented an experimental investigation of effect of silica fume and quarry dust in concrete.. This effect will be studied on compressive strength, flexural strength and tensile strength at 7 days, 14 days and 28 days taken at room temperature. M30 concrete is taken with partial replacement of cement by silica fume by 12%, 15% and partial replacement of sand by quarry dust by 20%, 30% and 40%.