Autoclaved Light weight Aerated Concrete Partition Board, referred to as ALC (Auto claved Light weight Concrete) board, is a high-performance product produced by introducing and absorbing the advanced technology and application experience developed in Japan and European countries over the past forty years. It is made of silica sand, fly ash, cement, lime and other main raw materials, added after rust-proof treatment of steel reinforcement, after high temperature, high pressure, steam curing and become a detailed porous, compact structure of the concrete panels.