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Foamed concrete, also called cellular light weight concrete is produced by the mixing a lightweight mortar result from water, Portland cement, fine sand including or alone fly ash and preformed stable foam. The foam is produced with the help of a foam generator by using foaming agent. The air content is typically between40 to80 percent of the total volume. The bubbles vary in size from around0.1 to1.5 mm in diameter. Foamed concrete differentiates from (a) gas or aerated concrete, where the bubbles are chemically formed through the reaction of aluminium powder with calcium hydro oxide and other alkalies released by cement hydration and (b) air entrained concrete, which has a much lower volume of entrained air is used in concrete for durability.
USES:
1. Foamed light weight concrete in the form of bricks, blocks or poured in-situ is used for thermal insulation over flat roofs or for cold storage walls or as non-load bearing walls in RCC/Steel framed buildings or for load bearing walls for low-rise buildings.
2. Fire rating of foamed concrete is far superior to that of brick work or dense concrete.
3. Bulk filling, using relatively low strength material, for redundant sewerage pipes, wells, disused cellars and basements, storage tanks, tunnels and subways etc.
4. Infill to the spandrel walls of arch bridges.
5. Backfill to retaining walls and bridge abutment.
6. Stabilizing soil, for example in the construction of embankment slopes.
7. Grouting for tunnel work.
Foam concrete is typically pumped on site to make forms such as retaining walls and foundations.
Foam concrete is a cement material manufactured by mixing a cement paste, also called slurry, or mortar with a manufactured foam material. This makes a substance that is porous and lightweight. The volume of slurry to foam in the mixture dictates the density of the final product and how it will be used.
Foam concrete, also called cellular concrete, is typically made of water, cement and foam. This mixture may also include aggregates or chemicals added to change its physical properties. It is a lightweight material with low density and limited strength in most applications. It is typically a self-levelling and compacting material that is more resistant to cracking and shrinkage than standard concrete mixes.
The strength and durability of foam concrete varies depending on the components mixed into it. For example, foam concrete made with sand is stronger and has a higher density than foam concrete made with just concrete and foam. Some foam concrete mixes include Portland cement that is mixed with the cement and foam by itself or mixed with pulverized fly ash. It may also include limestone. Each of these mixtures makes a cement product ideal for different applications, but typically all foam concrete products become more resistant when compressed and aren’t vulnerable to liquefication or settlement once hardened.
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www.sxbrickmachine.com/Foam concrete is lightweight, so it’s ideal in applications where large concrete forms are needed because it is easier to move from one location to another. It is easier to cut than standard concrete, making it ideal in situations where holes for wiring and pipe must be cut into the concrete. Foam concrete contains no toxic substances that might be harmful for the environment, making it an eco-friendly building material as well. Because foam concrete may consist of up to80 percent air, it has excellent insulation, sound-absorbing and fire-resistant properties.
Foam concrete made with cement and foam only is typically used in roofs and floors as an insulating material. Its low density makes it unsuitable for structural applications but it may be used to fill hollow blocks and voids between bricks and to fill unused culverts and underground voids such as old pipes. Foam concrete made with sand, cement and foam is denser, making it ideal for applications that require a structurally sound material such as when making precast blocks, for insulation and sound- proofing in residential and commercial buildings, foundations and for concrete slab work. Foam concrete may also be used for filling arches in bridges and viaducts, soil replacement and stabilization, and for road foundations.
Read more : http://www.ehow.com/info_8666005_foam-concrete.html
I agree with Mr. Ali.......................
I agree with MR ALI MOHAMMED and his answer very clear , thank you MR ALI , i remmber unversity
foam concrete is light concrete produced by adding special additive to create air bubbles inside the concrete and it uses at heat insulation or when light weight concrete is required
I agree with the comperhasive answer of Mr. Ali Mohamed Ahmed. Thanks.
it is a light weight concrete with low density, can be used as insulating material in roofs and floors. or as sound and heat proofing to some extent. can also be used for soil replacement , stabilization and for road foundation.
Mr ali answer is very good.
foam concrete, also called cellular concrete, is typically made of water, cement and foam. This mixture may also include aggregates or chemicals added to change its physical properties. It is a lightweight material with low density and limited strength in most applications. It is typically a self-levelling and compacting material that is more resistant to cracking and shrinkage than standard concrete mixes
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