UTILIZATION OF CUPOLA SLAG IN CONCRETE AS FINE AND COARSE AGGREGATE

Nowadays waste materials are utilized in the preparation of conventional concrete. In the present work the waste material considered is cupola slag which is by-product of cast iron manufacturing. The design mix for M20 and M25 grade concretes were arrived and the target strength was found to be 26.960 N/mm2 and 30.51 N/mm2 respectively. Cupola slag was used in concrete as partial replacements for fine and coarse aggregates (5%, 10%, 15%, 20%, 25%, 50% and 100%) to ascertain applicability in concrete. Since the disposal of cupola slag in open area causes environment pollution, it can be recycled for use in construction industry without producing any harm to human and environment. The maximum compressive strength attained was 33.778 N/mm2 and 38.222 N/mm2 at 15% for both M20 and M25 grades of concrete respectively at 28 days. Similarly the maximum split tensile strength attained was 3.206 N/mm2 and 3.819 N/mm2 for M20 and M25 grades at 15% and 5% respectively. The concrete with cupola slag as partial replacement for coarse aggregates gives less strength when compared to fine aggregates.