Aggregates are the raw materials for construction buiding, and they are inert granular materials such as sand, small-size gravel, or crushed stones. They along portland cement and water, are an essential ingredient in concrete making.
10 mm graded crushed rock or aggregate, for use in concrete. Called "blue metal" in Australia.
Construction aggregate, or simply “aggregate“, is a broad category of coarse particulate material used in construction, including sand, gravel, crushed stone, slag, recycled concrete and geosynthetic aggregates.
Aggregates are a component of composite materials such as concrete and asphalt concrete; the aggregate serves as reinforcement to add strength to the overall composite material. Due to the relatively high hydraulic conductivity value as compared to most soils, aggregates are widely used in drainage applications such as foundation and French drains, septic drain fields, retaining wall drains, and road side edge drains. Aggregates are also used as base material under foundations, roads, and railroads. To put it another way, aggregates are used as a stable foundation or road/rail base with predictable, uniform properties (e.g. to help prevent differential settling under the road or building), or as a low-cost extender that binds with more expensive cement or asphalt to form concrete.
Aggregate crusher unit major means jaw crusher, impact crusher, in some aggregate crushing plant, cone crusher and VSI crusher is needed.
Jaw crusher is the major crushing equipment in aggregate plant. Jaw crusher play roles as primary crushing to break large raw rocks, stones into small particles.
Impact crusher is an important crushing equipment in aggregate plant to produce high quality aggregate. The major feature of impact crusher is that the final produce of impact crusher is in cubical shape, which is suitable to be used as high quality aggregate.
VSI (vertical shaft impact) crusher is a high performance crushing equipment for aggregate production. VSI crusher has two working methods: “rock on rock” and “rock on iron”. Sand aggregate yield of “rock-on-iron” type is higher by 10-20% than that of “rock-on-rock” type. VSI crusher is widely used to crusher hard rocks like basalt, granite, hard limestone etc.
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