#foamconcrete Foam Concrete India #wallpanels#aircrete #clcblocks#lightweightconcrete#aacblocks

History @stretchceilingsDubai @CelloliteBlocks @foamconcrete

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 and production of foamed concrete was first carried out in the 1950s and 60s. Following this research, new admixtures were developed in the late 1970s and early 80s, which led to the commercial use of foamed concrete in construction projects. Initially, it was used in the Netherlands for filling voids and for ground stabilization. Further research carried out in the Netherlands helped bring about the more widespread use of foam concrete as a building material. More recently; foam concrete is being made with a continuous foam generator. The foam is produced by agitating a foaming agent with compressed air to make “aircrete” or “foamcrete”. This material is fireproof, insect proof, and waterproof. It offers significant thermal and acoustic insulation and can be cut, carved, drilled and shaped with wood-working tools. This construction material can be used to make foundations, subfloors, building blocks, walls, domes, or even arches that can be reinforced with a construction fabric.

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 mixed with a synthetic aerated foam in a concrete mixing plant. The foam is created using a foaming agent, mixed with water and air from a generator. The foaming agent must be able to produce air bubbles with a high level of stability, resistant to the physical and chemical processes of mixing, placing and hardening.

Foamed concrete mixture may be poured or pumped into moulds, or directly into structural elements. The foam enables the slurry to flow freely due to the thixotropic behavior of the foam bubbles, allowing it to be easily poured into the chosen form or mould. The viscous material requires up to 24 hours to solidify or as little as two hours if steam cured with temperatures up to 70 °C to accelerate the process. depending on variables including ambient temperature and humidity. Once solidified, the formed product may be released from its mold. A new application in foam concrete manufacturing is to cut large concrete cakes into blocks of different sizes by a cutting machine using special steel wires. The cutting action takes place before the concrete has fully cured.

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