Construction aggregates are materials used in building and construction projects. They include sand, gravel, crushed stone, and recycled concrete. These materials provide strength and stability to structures like roads, bridges, and buildings. Aggregates are essential for making concrete and asphalt, which are key components in construction. They help improve drainage, reduce erosion, and support the weight of structures. The quality and size of aggregates can significantly affect the durability and performance of the final product.