Building aggregates are materials used in construction to provide strength and stability to structures. They include natural substances like sand, gravel, and crushed stone, as well as manufactured materials such as recycled concrete. These aggregates are essential for creating concrete, asphalt, and other building materials. The size and composition of building aggregates can vary, affecting their performance in different applications. For example, coarse aggregates are larger particles used in concrete, while fine aggregates consist of smaller particles like sand. Proper selection and grading of aggregates are crucial for ensuring the durability and longevity of construction projects.