Aggregates

 

Construction aggregate, or simply "aggregate", is a broad category of coarse particulate material used in construction, including sandgravelcrushed stoneslag, recycled concrete and geosynthetic aggregates. Aggregates are the most mined material in the world. Aggregates are a component of composite materials such asconcrete 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. In other words, 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.

 

 

For further information, please click on the link below:

http://en.wikipedia.org/wiki/Construction_aggregate

 

 


 

Source:

Wikipedia, The Free Encyclopedia

 


 

 

 

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