Aggregates are sand, gravel, crushed rock and other similar materials used in building construction. In house construction, aggregates are commonly mixed with cement and water to form concrete.

Loose aggregate such as gravel is also used to provide a bed for foundations and when laying soil drains and water pipes in the ground. Aggregates are mostly obtained from quarrying and dredging from the sea and rivers, but a significant proportion in the UK now consists of recycled material, such as crushed concrete and geosynthetic aggregates produced from recycled plastic.

Post Author: Frances Traynor