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Autoclaved aerated concrete (AAC) is a lightweight, precast, cellular concrete building material. It is eco-friendly, and suitable for producing concrete-like blocks . [ 1 ] It is composed of quartz sand , calcined gypsum , lime , portland cement , water, and aluminium powder .
Reinforced autoclaved aerated concrete (RAAC) is a lightweight form of concrete that was used in schools, colleges and other building construction from the 1950s until the mid-1990s, according to ...
Aerated concrete produced by the addition of an air-entraining agent to the concrete (or a lightweight aggregate such as expanded clay aggregate or cork granules and vermiculite) is sometimes called cellular concrete, lightweight aerated concrete, variable density concrete, Foam Concrete and lightweight or ultra-lightweight concrete, [17] [18 ...
As the crisis of crumbling Reinforced Autoclaved Aerated Concrete (Raac) became apparent, money from the scheme was prioritised for hospitals most affected by the material’s degradation.
The 2023 United Kingdom reinforced autoclaved aerated concrete crisis relates to increased safety concerns over reinforced autoclaved aerated concrete, commonly used historically in roofing and wall construction within the public sector, having gained popularity in the mid-1950s as a cheaper and more lightweight alternative to conventional reinforced concrete.
A Surrey theatre's roof and floor are a "critical risk" with many panels identified in a report as having reinforced autoclaved aerated concrete (Raac). The Harlequin Theatre, in Redhill, has been ...
Reinforced autoclaved aerated concrete, a construction material; Rowing Association of American Colleges, U.S. (1870–1894) Royal Australian Armoured Corps; See also
Here is the latest list of schools in England with confirmed Raac (reinforced autoclaved aerated concrete) as of September 14, according to the Department for Education (DfE).