This paper reports an experimental program to investigate the effect of using copper slag as a complete 100% replacement of sand on the property of fine aggregate. Addition of red soil in ratio 0%, 5%, 10% in cement.M25 mix design has been used. Concrete mixes were evaluated for compressive strength and split tensile strength. With two different composition of 7 days and 28 days. This result indicates that the 10% addition of red soil to cementand 100% replacement of copper slag show the greater results in both split tensile strength and compressive strength than compared to the conventional concrete. Whereas the addition of 5% red soil to cement causes the result in reduction of compressive strength and split tensile strength, however it shows the greater result when compared to the conventional concrete.