Concrete, a fundamental element in contemporary construction, plays a crucial role in infrastructure development, consisting of fine aggregates, coarse aggregates, cement, and water. However, concerns have risen regarding the overuse of natural aggregates, leading to the depletion of traditional construction materials. This study investigates the engineering feasibility of replacing coarse aggregate with crushed burnt bricks in concrete formulations. Various replacement percentages (10%, 20%, 30%, 40%, and 100% by volume) are explored to achieve specified targets in strength and durability. The evaluation includes workability, hardened density, compressive strength, flexural strength, and water penetration depth, maintaining a consistent water/cement ratio of 0.49 and strategically utilizing chemical admixtures to enhance performance.
The results indicate a decrease in slump and flexural strength with increasing replacement percentages, a 3% reduction in hardened density at 30% replacement, and an increased water penetration depth. The concrete mix, designed for M25 grade, undergoes extensive testing, revealing a trade-off between workability and strength beyond a 20% replacement threshold. This research emphasizes the importance of exploring the engineering potential of crushed burnt bricks as a substitute for conventional coarse aggregates, contributing to environmental conservation and reducing reliance on traditional resources.