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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.
Braintree is a town in Essex, England, and is the principal settlement of Braintree District. It is located 10 miles (16 km) north-east of Chelmsford, 15 miles (24 km) west of Colchester and 35 miles (56 km) north-west of Southend-on-Sea. According to the 2021 Census, the town had a population of 43,492; the urban area, which includes Great Notley, Rayne, Tye Green and High Garrett, had a population of 55,793.[1]
Braintree district has four market towns, picturesque villages, a designer shopping outlet, historic houses and gardens.
The town has grown contiguously with several surrounding settlements. The original settlement and parish of Braintree lay on the River Brain and was bounded on the north by Stane Street, the Roman road from Braughing to Colchester. North of that road was the parish of Bocking. The two parishes were united in 1934 as the parish and urban district of Braintree and Bocking, which was subsequently abolished in 1974 when the modern Braintree District was created. Several local organisations still include Braintree and Bocking in their names.[nb 1]
Braintree is bypassed by the modern-day A120 and A131 roads, while trains serve two stations in the town, at the end of the Braintree Branch Line from Witham.
The town is twinned with Pierrefitte-sur-Seine, France,[2] and gives its name to the towns of Braintree, Massachusetts and Braintree, Vermont, in the United States.[2]
