This study investigates the impact of incorporating quarry sand into concrete mixes, focusing on its characteristics and environmental sustainability. Three concrete specimens were prepared with varying proportions of quarry sand (10%, 20%, and 30%). The study evaluates the flexural strength, compressive strength, and ultrasonic pulse velocity of each specimen. Results indicate a notable enhancement in performance with the addition of quarry sand. Optimal characteristics were observed in the specimen containing 30% quarry sand. This suggests the viability of utilizing quarry sand as a partial replacement for river sand in concrete production, promoting sustainable practices in construction materials.