Theory and design for M40 concrete having 0, 20, 30, 40 and 60% FA by mass of cementitious material are briefly discussed in this article. The cementitious material's bulk dictates the percentages. Compressive strength, flexural strength, and tensile strength of M40 after 28 and 56 days of curing at various FAs are measured and compared to the controlled mixes using cast cubes, beams, and cylinders. The normal compressive strength of concrete may be achieved by replacing fifty percent of the cement in the mixture with FA. In order to show how cost-effective big volume FA concrete is in terms of both strength and cost, the strength test results are compared with the costs. The two mixes, each with a different amount of FA content, and the controlled blends are cost-comparisoned. Waste material in huge amounts may be used as raw material, and this investigation might lead to the creation of solutions to reduce environmental pollution and promote the concept of green architecture.