Crusher - WikipediaA crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. . Crushing devices hold material between two parallel or tangent solid surfaces, .. Jaw crushers, Soft to very hard, No limit, Dry to slightly wet, not sticky, 3/1 to 5/1, Heavy .. The short head type is applied to coarse fine crushing.crusher very fine material,Aggregates - The Portland Cement AssociationAggregates are inert granular materials such as sand, gravel, or crushed stone . of clay and other fine materials that could cause the deterioration of concrete. . Crushed aggregate is produced by crushing quarry rock, boulders, cobbles, . Harder aggregate can be selected in highly abrasive conditions to minimize wear.
crusher very fine material