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  2. Reinforced concrete - Wikipedia

    en.wikipedia.org/wiki/Reinforced_concrete

    It is made of reinforced concrete clad in a mosaic of thousands of triangular soapstone tiles. [4] Many different types of structures and components of structures can be built using reinforced concrete elements including slabs, walls, beams, columns, foundations, frames and more. Reinforced concrete can be classified as precast or cast-in-place ...

  3. Voided biaxial slab - Wikipedia

    en.wikipedia.org/wiki/Voided_biaxial_slab

    Concrete is poured around these plastic forms to create internal voids in the slab A voided biaxial slab installation in Turkey. Voided biaxial slabs, sometimes called biaxial slabs or voided slabs, are a type of reinforced concrete slab which incorporates air-filled voids to reduce the volume of concrete required.

  4. List of commercially available roofing materials - Wikipedia

    en.wikipedia.org/wiki/List_of_commercially...

    Concrete roofing is composed of concrete reinforced with fibers of some sort. Structural concrete can also be used for flat roof constructions. There are three main categories, precast/prestressed, cast-in-place and shell. There are many types of precast/prestressed concrete roofing. The following are the most common types. [8]

  5. Waffle slab - Wikipedia

    en.wikipedia.org/wiki/Waffle_slab

    The underside of a waffle slab, showing the grid like structure. A waffle slab or two-way joist slab is a concrete slab made of reinforced concrete with concrete ribs running in two directions on its underside. [1]

  6. Ferrocement - Wikipedia

    en.wikipedia.org/wiki/Ferrocement

    Ferrocement originated in the 1840s in France and the Netherlands and is the precursor to reinforced concrete. It has a wide range of other uses, including sculpture and prefabricated building components. The term "ferrocement" has been applied by extension to other composite materials, including some containing no cement and no ferrous material.

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

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

    Reinforced autoclaved aerated concrete is a lightweight form of concrete used from the 1950s to the 1990s. ... In 2018, it was flagged as a safety risk after a school roof collapsed in Kent.