What is RAAC concrete and why is it a safety risk? - BBC
Reinforced autoclaved aerated concrete (RAAC) is a lightweight material that was used mostly in flat roofing, but also in floors and walls, between the 1950s and 1990s.
Autoclaved aerated concrete - Wikipedia
Autoclaved aerated concrete (AAC) is a lightweight, precast, cellular concrete building material, eco-friendly, [1] suitable for producing concrete-like blocks. It is composed of quartz sand , calcined gypsum , lime , portland cement , water and aluminium powder .
What is RAAC concrete and could it be in your home?
Oct 12, 2023 · RAAC is a type of concrete that was used extensively within the construction of walls, floors and roofs between the 1950s and 1990s. RAAC became popular as a lightweight and lower cost alternative to concrete, and also offers good fire-resistant properties.
How to locate RAAC – and what to do about it | Journals - RICS
Sep 18, 2023 · The topic of reinforced autoclaved aerated concrete (RAAC) has become headline news in the UK recently. We are now seeing the closure of schools – but the impact of RAAC is being felt more widely.
Experts warn RAAC concrete affects thousands of UK buildings - BBC
Sep 6, 2023 · Tens of thousands of government and privately owned buildings should be safety checked because of crumbling RAAC concrete, experts say. The team that alerted the government to the problems posed...
RAAC concrete house was meant to be our forever home
May 2, 2024 · Reinforced autoclaved aerated concrete (RAAC) was used mostly in flat roofing, but also in floors and walls, between the 1950s and 1990s. It has been found in public …
RAAC: Advice and FAQs - RICS
Apr 26, 2024 · RAAC is a reinforced form of lightweight concrete used to form panels or planks. It has no aggregate unlike common concrete. These were mainly used in flat roofs but also in some floor and wall panel construction in the UK from the mid-1950s to the mid-1990s.
RAAC: How long have we known about unsafe concrete in schools? - BBC
Sep 4, 2023 · Between the 1950s and 1990s the material, known as RAAC (reinforced autoclaved aerated concrete), was used mostly in flat roofing, but also in floors and walls. It offered a cheaper...
Expert explainer: What is Reinforced Autoclaved Aerated Concrete (RAAC …
Mar 17, 2023 · “One innovative construction material and process was RAAC: Reinforced Autoclaved Aerated Concrete, which is an aerated lightweight cementitious material with no coarse aggregate; the material properties and structural behaviour therefore differs significantly from ‘traditional’ reinforced concrete.
Reinforced autoclaved aerated concrete (RAAC): key questions …
Aug 31, 2023 · Reinforced autoclaved aerated concrete (RAAC) is an aerated lightweight form of concrete with no coarse aggregate. The material properties and structural behaviour therefore differ significantly from ‘traditional’ reinforced concrete.