Autoclaved Aerated Concrete(AAC)Brick is a light weight, multi-cell new construction material; The features include lower density, heat insulation, possibility, fire and acoustical resistant properties. AAC is made from silicon material(silica sand, or recycled fly ash) and calcium material (lime, cement), mixing with foaming additive (aluminum powder), batching with, the reaction between aluminum and concrete causes microscopic hydrogen bubbles to from, expanding the concrete to about five times its original volume. It is made into the multi-cell silicate product by the processes of molding, pre-curing, cutting, evaporating and curing.