Experimental Study on Mechanical Properties of High-Performance Concrete Incorporating GGBS and Marble Powder

High-Performance Concrete (HPC) has gained significant importance in modern construction due to its superior strength and improved performance characteristics. The incorporation of supplementary cementitious materials and industrial by- products in concrete not only improves mechanical properties but also contributes to sustainable construction practices. In the present study, the effect of Ground Granulated Blast Furnace Slag (GGBS) and marble powder as partial replacements of cement in M50 grade High-Performance Concrete was investigated. Cement was partially replaced with GGBS in the range of 20–40% and marble powder in the range of 5–15%. Mechanical properties such as compressive strength, split tensile strength, and flexural strength were evaluated at different curing ages. The experimental results indicate that the incorporation of GGBS improves the later-age strength of concrete, while marble powder enhances early-age strength due to its filler effect. The optimum mix proportion was observed at 30% GGBS and 10% marble powder, which exhibited higher strength compared to control concrete. The results demonstrate that the use of these materials can enhance mechanical performance while reducing cement consumption and environmental impact.