Construction aggregate, or simply "aggregate", is a broad category of coarse to medium grained particulate material used in construction, including sand, gravel, crushed stone, slag, recycled concrete and geosynthetic aggregates. Aggregates are the most mined materials in the world. into three main areas: Mining of mineral aggregate deposits, including sand,
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There is often confusion over what is quarrying and what is mining. by other names around the world: surface mine, pit, open pit or opencast mine. of mineral extracted by quarrying is used for construction and known as "aggregates".