Autoclaved Aerated Concrete, also known as AAC, is a green precast building material present in the global market for over 70 years and is extensively used in residential, commercial and industrial construction.AAC is a well-established building material, which has rapidly gained worldwide market share from conventional building materials because of its superior characteristics.This eco-friendly building material is made from natural raw materials such as sand (or fly-ash), cement, lime, gypsum, aluminium powder and water. This mix creates an aerated concrete providing insulation, structure and fire protection in one lightweight product.