AAC is short for Autoclaved aerated concrete, is made with fine aggregates, cement, and an expansion agent that causes the fresh mixture to rise like bread dough. In fact, this type of concrete contains 80% air, which is a green and sustainable building material. In the factory where it is made, the material is molded and cut into precisely dimensioned units then
steamed in the AAC autoclave.
Advantages of AAC
AAC combines insulation and structural capability in one material for walls, floors, and roofs. Its light weight/cellular properties make it easy to cut, shave, and shape, accept nails and screws readily, and allow it to be routed to create chases for electrical conduits and small-diameter plumbing runs. This gives it design and construction flexibility, and the ability to make easy adjustments in the field.
Durability and dimensional stability. A cement-based material, AAC resists water, rot, mold, mildew, and insects after . Units are precisely shaped and conform to tight tolerances.
Fire resistance is excellent, with 8 in. thick AAC achieving a 4-hr rating (actual performance exceeds that and meets test requirements for up to 8 hr). And because it is noncombustible, it will not burn or give off toxic fumes.
The light weight means that R-values for AAC are comparable to conventional frame walls, but they have higher thermal mass, provide air tightness, and as just noted, are not combustible. That light weight also gives a high sound reduction for privacy, both from outside noises and from other rooms when used as interior partition walls.
Limitations of AAC
But the material does have some limitations. It is not as widely available as most concrete products, though it can be shipped anywhere. If it has to be shipped, its light weight is advantageous. Because it is lower strength than most concrete products or systems, in load-bearing applications, it must typically be reinforced. It also requires a protective finish since the material is porous and would deteriorate if left exposed.
The article is provided by Zhengzhou Boiler Co., Ltd. As a professional AAC autoclave manufacture, ZG is always doing the best in products and service.
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