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A precast concrete walled house in construction

Precast concrete is an ancient type of construction material made with concrete cast in a reusable mold or "form" and cured in a controlled environment, then transported to the construction site and lifted into place. In contrast, standard concrete is poured-in-place in large forms and cured on site. Precast "stone" is distinguished from precast concrete by using a fine aggregate in the mixture so the final product approaches the appearance of naturally occurring rock or stone. Image File history File links Question_book-3. ... This article is about the construction material. ... Limestone Quarry Construction aggregate, or simply, aggregate, is a broad category of coarse particulate material used in construction, including sand, gravel, crushed stone, slag, and recycled concrete. ...

Ancient Roman builders made use of concrete and soon poured the material into molds to build their complex network of aqueducts, culverts and tunnels. Modern uses for precast technology include a variety of architectural applications including free-standing walls used for landscaping, soundproofing and security walls. Precast architectural panels are also used to clad all or part of a building facade. Stormwater drainage, water and sewage pipes and tunnels make use of precast concrete units. The advantages of using precast concrete is the increased quality of the material, when formed in controlled conditions, and the reduced cost of constructing large forms used with poured-in-place concrete. For other uses, see Aqueduct (disambiguation). ... A culvert is a flowing body of water which passes underneath a road, railway, or embankment, or the part thereof that does so. ... Soundproofing is any means of to reducing the intensity of sound with respect to a specified source and receptor. ... For other uses, see facade (disambiguation). ...

There are many different types of precast concrete forming systems for architectural applications, differing in size, function and cost.

References

External links

• National Precast Concrete Association (NPCA) – news and trends in precast concrete
• Canadian Precast/Prestressed Concrete Institute
• BIBM - A Precast Concrete Association of Associations
• Midwest Precast Association
• Precast/Prestressed Concrete Institute – Resources and information on Precast and Prestressed Concrete