Optimizing Sustainable Self-Compacting Concrete with Dolomite and Fly Ash Integration

Concrete plays an important role in the field of construction and cement is main component of it. In this paper the experimental study of partial replacement of cement with dolomite and fly ash is done. The research presented here explores the use of dolomite and fly ash as cement substitutes to improve sustainable self-compacting concrete (SCC). Dolomite is an anhydrous material and is composed of calcium magnesium carbonate. Experimental phases involve fresh concrete properties, including workability, and mechanical properties like compressive and splitting tensile strengths. In design mixes cement is replaced with dolomite and fly ash in varying percentages. The replacement percentages of cement by dolomite powder and fly ash is 15%, 20%, 25%,30%,35%,40%,45% and 50%. The concrete achieved the required strength levels in early time indicating good performance. Dolomite emerges as a key contributor to early and enhanced strength in SCC, promoting sustainability in construction. With the addition of dolomite powder microstructure of concrete filled up and its internal pores refined due to which it contributes to increase its compressive strength. Furthermore, substituting cement with dolomite fostered the creation of CSH gel. In 7 days, 14 days, and 28 days for concrete, the test specimens were cured and tested for compressive strength and split tensile strength.