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Wholesale concrete aggregates may be inert granular materials such as sand, gravel or crushed stone. Concrete ingredients may include aggregates along with water and portland cement that basically makes cement. Aggregates might need to be clean, hard and strong particles without absorbed chemicals or coatings of clay and other fine materials. Natural gravel and sand may be dug or dredged from a pit, river, lake or seabed. Crushed aggregates might be produced through crushing quarry rock, boulders, cobbles or large gravel. Concrete aggregates process might be a combination of crushing, screening and washing the aggregate to create proper cleanliness and gradation. Proper aggregates may strongly influence concrete freshly mixed and hardened properties.
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