Used primarily in Portland cement production, this compound contributes to early strength development in concrete. It reacts with water to form calcium silicate hydrate and calcium hydroxide, driving the hydration process that gives concrete its hardness and durability. Due to its high reactivity, it plays a key role in determining setting time and heat of hydration. Its presence enhances the compressive strength of cement within the first few days after pouring, making it essential for fast-setting and high-strength concrete applications in construction, including buildings, bridges, and roads.