Concrete is most used material in construction and which is made from natural resources, the present investigation is focused on developing lime sludge-based cement concrete mix of different grades of M40 containing lime sludge in different proportions. The optimum content of these materials was obtained after several trails. Mechanical properties such as compressive, flexural and split tensile strengths of cement concrete were determined. Cement is replaced with 0%, 10%, 20% and 30% of Lime sludge by weight of cement and Lime Sludge is optimized.