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    Foam concrete - Wikipedia

    Terminology

    It is also called foamed concrete, foam concrete, aerated concrete, aircrete, cellular lightweight concrete, or … See more

    History

    The history of foam concrete dates back to the early 1920s and the production of autoclaved aerated concrete, which was used mainly as insulation. A detailed study concerning the composition, physical properties … See more

    Manufacturing

    Foamed concrete typically consists of a slurry of cement or fly ash and sand and water, although some suppliers recommend pure cement and water with the foaming agent for very lightweight mixes. This slurry is further mi… See more

    Properties

    Foam concrete is a versatile building material with a simple production method that is relatively inexpensive compared to autoclave aerated concrete. Foam concrete compounds utilising fly ash in the slurry mix is cheaper … See more

    Advantages

    • In terms of thermal conductivity, foam concrete is not inferior to wood. A 40 cm wall is able to withstand -30°C frost.
    • Foam concrete withstands one-sided exposure to fire for at least three hours, and on average, five hours. … See more

    Applications

    Foamed concrete can be produced with dry densities of 400 to 1600 kg/m (25 lb/ft to 100 lb/ft ), with 7-day strengths of approximately 1 to 10 N/mm (145 to 1450 psi) respectively. Foam concrete is fire resistant, a… See more

    Trends and development

    Until the mid-1990s, foam concrete was regarded as weak and non-durable with high shrinkage characteristics. This is due to the unstable foam bubbles resulted in foam concrete having properties unsuitable for produci… See more

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