Ground Calcium Carbonate (GCC) is commonly used in the cement industry as a key raw material and additive. It acts as a filler to improve the workability and strength of cement-based products. GCC enhances the hydration process, contributing to faster setting times and increased durability of concrete. Its fine particle size helps fill voids within the cement matrix, reducing porosity and improving density. Additionally, GCC can reduce production costs by partially replacing clinker, making cement manufacturing more efficient and environmentally friendly. This makes GCC an important component in producing high-quality, sustainable construction materials.