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Construction Aggregate
Construction aggregate, or simply aggregate, is a broad category of coarse- to medium-grained particulate material used in construction. Traditionally, it includes natural materials such as sand, gravel, crushed stone. As with other types of aggregates, it is a component of composite materials, particularly concrete and asphalt. Aggregates are the most mined materials in the world,[1][2] being a significant part of 6 billion tons of concrete produced per year.[3] Aggregate serves as reinforcement to add strength to the resulting material. Due to the relatively high hydraulic conductivity as compared to most soil types, aggregates are widely used in drainage applications such as foundation and French drains, septic drain fields, retaining wall drains, and roadside edge drains. Aggregates are also used as base material under building foundations, roads, and railroads (aggregate base). It has predictable, uniform properties, preventing differential settling under the road or building. Aggregates are also used as a low-cost extender that binds with more expensive cement or asphalt to form concrete. Although most kinds of aggregate require a form of binding agent, there are types of self-binding aggregate which require no form of binding agent.[4] More recently, recycled concrete and geosynthetic materials have also been used as aggregates.
Market Rasen is a town and civil parish within the West Lindsey district of Lincolnshire, England. The River Rase runs through it east to west, approximately 13 miles (21 km) north-east from Lincoln, 18 miles (29 km) east from Gainsborough and 16 miles (26 km) south-west from Grimsby. It lies on the main road between Lincoln and Grimsby, the A46 and is on National Cycle Route 1 (part of EuroVelo 12) of the National Cycle Network.[2]
In 2001 the town had a population of 3,200.[3] In the 2011 census he population of the civil parish was 3,904.[4]
The town is known for Market Rasen Racecourse and being close to the epicentre of a 2008 earthquake.
