The Rapid Construction activities has increased in the demand for concrete, which leads to overuse of natural resource in the manufacture of cement. Hence, conservation of natural resources is necessary. Among the wastes generated by the various industries it is presumed that 10%-15% of wastes are hazardous and increasing at the rate of 2% - 5% per year, resulting in environmental pollution and effect to living beings.

The present work is focused on the use of wastes such as paper sludge (from Paper Mill Industry) which can be utilized as alternative construction material, so that it would be one of the consistent ways of disposal. The study also incorporates the use of foundry sand as a partial replacement for sand. Experiments were performed to understand the strength parameters such as compressive and tensile strength of Paper Sludge Ash (5%, 10%, and 15%) as a partial replacement of cement and Foundry Sand (20%, 40% and 60%) as a partial replacement of fine aggregate. From the study it can be observed that replacement of cement with 40% foundry sand 8.12% increase in compressive strength was obtained. Mix with 40% replacement of foundry sand and 5% replacement of Paper Sludge Ash gave the maximum Flexural Strength compared to other mix.