The present study will provide a better understanding of mechanical and durability properties of concrete in which fine aggregate is partially replaced with copper slag. In the present experimental study the various strength properties like compressive strength, a tensile strength of concrete and also durability properties like capillary suction absorption test on both ordinary concrete and copper slag Concrete, best copper slag concrete mix is carried out and compared with an ordinary concrete mix for economic and ecological study. In this study different percentage of copper, slag is used. Copper slag as a replacement of fine aggregate in concrete and replaced in the range of 0%, 10%, 20 %, 30%, 40% and 50% by weight of fine aggregate in concrete. It was found that with the increase in the amount of copper slag in concrete up to 30% with increased mechanical properties of concrete. It was also found that durability like acid resistance and capillary suction absorption test conducted for long durability show that addition of copper slag up to 30% certain limit replacement to fine aggregate with less water absorption compare with control mix and less affected with acid attack.