AAC is called as Advance Aerated Concrete block or ALC is called Aerated lightweight concrete. The blocks are made to aerate by creating a reaction between silica in base material such as fly ash, active lime, and aluminum powder. 

The finished product is a 2.5 times lighter Block compared to conventional Bricks, while providing the similar strengths. The specific gravity stays around 0.6 to 0.65. This is one single most USP of the AAC / ALC blocks, because by using these blocks in structural buildings, the builder saves around 30 to 35 % of structural steel, and concrete, as these blocks reduce the dead load on the building significantly. 

AAC block is used in a wide range of commercial, industrial and residential application. AAC Blocks / ALC Blocks are largely used in various constructions, such as Boundary walls, pillar structure Buildings.