In this paper, waste industrial slag is used in concrete mix design to increase the compressive strength of concrete. The disposal of this type of industrial waste or by product is an environmental issue. Scientific analysis has predetermined their impact on nature; using waste slag in a creative way is a challenging task. All laboratory scale experiments are performed to study the effect of complete replacement of fine aggregate by industrial waste slag on various parameters such as strength and durability of concrete mix. Here we replace fine aggregate with waste industrial slag. Slag sieve analysis and mix design are performed in place of fine aggregate and compressive strength is checked after 7, 14 and 28 days respectively. A promising result was obtained after using slag in concrete. This paper reports the results of a feasibility study of waste industrial slag as fine aggregate in concrete.