Coarse aggregates are large particles used in construction materials, primarily in concrete and asphalt. They typically consist of crushed stone, gravel, or recycled concrete, and their size usually ranges from 4.75 mm to 50 mm. These aggregates provide strength and stability to structures, making them essential for building foundations, roads, and other infrastructure. The quality of coarse aggregates can significantly affect the durability and performance of concrete. Factors such as shape, texture, and grading influence how well the aggregates bond with cement. Proper selection and use of coarse aggregates contribute to the overall longevity of construction projects, ensuring they can withstand various environmental conditions.