The advancement of concrete technology can reduce the consumption of natural resources and lessen the burden of pollutants on the environment. Nowadays large amounts of Ground Granulated Blast Furnace Slag (GGBS) are generated in thermal industries with an important impact on the environment. In recent years, many researchers have established that the use of supplementary cementitious materials like Ground Granulated Blast furnace slag (GGBS), fly ash (FA), silica fume, rice husk ash (RHA), etc, can not only improve the various properties of concrete but also can contribute to the economy in construction costs. This research work describes the feasibility of using the thermal industry waste GGBS and demolished building waste as a partial replacement for cement and coarse aggregate as in concrete production. By using these waste materials in concrete for new projects we can also reduce the emission of CO2 which is generated while production of Cement in the cement factory which is very dangerous for the environment. The cement has been replaced by GGBS accordingly in the range of 0% (without GGBS), 20%, 30% & 40%, and replacing coarse aggregate by RCA in range of 15%, 30% & 45% weight of cement and aggregate for M40. Concrete mixtures were produced, tested, and compared in terms of compressive strength with conventional concrete. This test was carried out to evaluate the mechanical properties of the test results for compressive strength for up to 28 days.