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  2. Autoclaved aerated concrete - Wikipedia

    en.wikipedia.org/wiki/Autoclaved_aerated_concrete

    Reinforced autoclaved aerated concrete (RAAC) is a reinforced version of autoclaved aerated concrete, commonly used in roofing and wall construction. The first structural reinforced roof and floor panels were manufactured in Sweden. Soon after, the first autoclaved aerated concrete block plant started there in 1929.

  3. Xella - Wikipedia

    en.wikipedia.org/wiki/Xella

    The Xella Group develops, produces, and sells building materials and insulating materials – based on mineral resources. [1] With its Ytong, Silka and Hebel brands, Xella is one of the world's largest manufacturers of autoclaved aerated concrete and calcium silicate blocks.

  4. 2023 United Kingdom reinforced autoclaved aerated concrete ...

    en.wikipedia.org/wiki/2023_United_Kingdom...

    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.

  5. What is RAAC concrete? How to tell if school buildings are at ...

    www.aol.com/raac-concrete-tell-school-buildings...

    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 ...

  6. Foam concrete - Wikipedia

    en.wikipedia.org/wiki/Foam_concrete

    The history of foam concrete dates back to the early 1920s and the production of autoclaved aerated concrete, which was used mainly as insulation. [2] A detailed study concerning the composition, physical properties and production of foamed concrete was first carried out in the 1950s and 60s.

  7. Insulating concrete form - Wikipedia

    en.wikipedia.org/wiki/Insulating_concrete_form

    The first expanded polystyrene ICF Wall forms were developed in the late 1960s with the expiration of the original patent and the advent of modern foam plastics by BASF. [citation needed] Canadian contractor Werner Gregori filed the first patent for a foam concrete form in 1966 with a block "measuring 16 inches high by 48 inches long with a tongue-and-groove interlock, metal ties, and a waffle ...

  8. Talk:Autoclaved aerated concrete - Wikipedia

    en.wikipedia.org/wiki/Talk:Autoclaved_aerated...

    When considering embodied energy of this product relative to poured concrete or concrete masonry units, keep in mind that AAC is mostly air by volume. Therefore, the actual Portland cement content by volume is very low relative to solid concrete or CMU.

  9. Concrete block - Wikipedia

    en.wikipedia.org/wiki/Concrete_block

    A pallet of "8-inch" concrete blocks An interior wall of painted concrete blocks Concrete masonry blocks A building constructed with concrete masonry blocks. A concrete block, also known as a cinder block in North American English, breeze block in British English, or concrete masonry unit (CMU), or by various other terms, is a standard-size rectangular block used in building construction.