AAC is to be made of lightweight porous silicate commodities by taking silica materials (sand, coal ash, silica tailings, etc.) and calcium materials (lime, cement) as raw materials, mixing with aerating agent (aluminium powder) and making lightweight porous silicate commodities based on the processes of seasoning, mixing, pouring, pre-cultivation, cutting, autoclaving, and maintenance.

Aerating contains a large number of symmetrical and fine pores, so it is called aerated concrete.

Essentially, all AAC, including AAC blocks, foamed concrete and concrete with air-entraining agent.

Narrowly defined as AAC blocks. Generally classified according to the type of raw materials, process load-bearing efficacy.

According to the appearance, AAC can be divided into various specifications of blocks or plates.

Based on raw materials, most of the AAC has three kinds: (cement, lime, coal ash aerated brick); (cement, lime, sand aerated brick); (cement, slag, sand aerated brick)

AAC can be divided into five types according to its use: non-load-bearing blocks, load-bearing blocks, insulation blocks, wall panels and roofing.
Aerated concrete is characterised by light density, high thermal insulation performance, good sound absorption and certain strength processability, and is one of the earliest and most widely used lightweight wall panel materials in China.
Scope of use of AAC

The production and application of non-load-bearing blocks is the most extensive, the bulk density is generally 500 kg/m3 and 600 kg/m3, mainly used for structural masonry and partition walls, not load-bearing; load-bearing blocks have a bulk density of 700 kg/m3 and 800 kg/m3, the project is load-bearing after special structural treatment; thermal insulation blocks have a general bulk density of 300 kg/m3 and 400 kg/m3, mainly used for building exterior walls, the bulk density of 300 kg/m3 and 400 kg/m3, mainly used for building exterior walls, the bulk density of 300 kg/m3 and 400 kg/m3, mainly used for building exterior walls, the bulk density of 400 kg/m3, mainly used for building exterior walls. m3, mainly used for building exterior wall insulation; roof and wall panels are reinforced aerated concrete panels, with different hoops according to different uses. 

1、High-level architecture building. Years of practice has proved. The use of AAC in high-rise architecture buildings is economical and reasonable, especially with the inner wall of the block base wall, which has gained general acceptance in the society.

2, Earthquake-resistant geographical buildings. Because of the light weight of AAC, its building seismic force is small, which is beneficial to earthquake resistance. Comparison with the brick building, in the same building and seismic conditions, seismic design defence level and the level of earthquake damage is too big a difference. If the brick building to do 7 degrees of defence, will be destroyed. At this time, the aerated concrete building only to do 6 degrees of defence, will not be destroyed. 1975 Haicheng earthquake period, more than 30 porous concrete buildings slightly damaged, while the neighbouring brick buildings were seriously damaged; 1976 Tangshan earthquake period, Beijing Baijiazhuang, a five-storey aerated concrete loaded building weighing only 700kg/m2. At that time, the seismic intensity of the earthquake was 6 degrees strong, there is no new gap after the earthquake. However, large diagonal cracks occurred in the lower side of the four-storey mixed structure house at 50m.

3, The building in the cold region. AAC has a good thermal insulation effect. The thermal insulation effect of its 200mm thick wall is equivalent to the thermal insulation effect of 490mm thick wall, because of its construction in the cold region of the economic benefits of the building is outstanding and competitive.
Fourth, soft plastic roadbed construction. Under the same roadbed conditions, the number of layers of AAC building can be increased, economically favourable. The main disadvantage of aerated concrete is to collect large, low elasticity abrasive, fear of cold. Thus, aerated concrete is not suitable for the following sites, temperature greater than 80 ℃, acid and alkali environmental damage; long-term wet environment, especially in the cold region.