In the Present study we are investigating on mechanical (compressive strength and split tensile test) and durability (Resistance to sulfate attack test) properties of concrete by adding waste foundry sand as partial replacement of sand in various percentages, 10%, 20%,30% and 100% respectively. This report demonstrates the possibilities of using waste foundry sand as partial replacement of sand in concrete Tests were performed for compressive strength, split tensile strength and sulfate resistant test for all replacement levels of waste foundry sand at different curing periods (7-days & 28 days).