Aerated concrete block It is a new building material with light weight, porous, heat insulation, good fire resistance, nailing, sawing, planing and certain seismic resistance. As early as the early 1930s, China began to produce such products and widely used them.

Light weight: Aerated concrete block The general mass is 500-700 kg/m3, which is only 1/4-1/3 of clay brick and lime sand brick, and 1/5 of ordinary concrete. It is the lighter type of concrete, and is suitable for infill walls of high-rise buildings and load-bearing walls of low rise buildings. Since the deadweight of the building is reduced and the seismic damage is small, the seismic capacity of the building is greatly improved.

Thermal insulation: thermal conductivity of aerated concrete is generally 0.11-0.18W/m · K, which is only 1/4-1/5 of that of granular soil brick and lime sand brick (thermal conductivity of granular soil brick is 0.4-0.58W/m · K; thermal conductivity of lime sand brick is 0.528W/m · K), which is about 1/6 of that of ordinary concrete. The thickness of the wall is greatly reduced, accordingly, the effective use area of the building is expanded, the thickness of building materials is saved, the construction efficiency is improved, the project cost is reduced, and the dead weight of the building is reduced.

High strength: according to the experiment, the compressive strength of aerated concrete block is more than 25kg/cm2, which is equivalent to the compressive strength of 125 # clay brick and lime sand brick.

Earthquake resistance: During the earthquake in Fengnan, Tangshan and other places with a magnitude of 7.8, according to the post earthquake survey, only a few new cracks appeared in the aerated concrete buildings, while almost all of the brick and concrete structures collapsed, making a sharp contrast between the two buildings, which are not far apart and have the same structure but different materials. According to the analysis, this is because the aerated concrete has light volume weight, good overall performance and small inertia force during earthquake, so it has certain seismic capacity. This will be of great benefit to our earthquake prone country.

Processability: aerated concrete has good processability. Able to saw, plane, nail, mill and drill. And reinforcement can be added during manufacturing. It brings great convenience and flexibility to the construction.

High temperature resistance: when the temperature of aerated concrete is below 600 ℃, its compressive strength slightly increases. When the temperature is about 600 ℃, its compressive strength is close to the compressive strength at room temperature, so the fire resistance of aerated concrete as a building material meets the national first class fire protection standard.

Sound insulation: it can be seen from the air hole structure of aerated concrete that the internal structure of aerated concrete is like bread, with a large number of closed air holes evenly distributed, so it has sound absorption performance that is not possessed by ordinary building materials.

Mechanization: as far as the current situation is concerned, prefabrication of aerated concrete for assembling large plates can save the stacking area of finished products; Save masonry labor; Construction operation is reduced; The site construction progress is accelerated and the construction efficiency is improved.

Adaptability: It can be customized according to different local raw materials and conditions. The raw materials can be river sand, fly ash, ore sand and other materials, which are adapted to local conditions. And it can be used as waste, which is beneficial to environmental protection and can really turn waste into treasure.

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