The autoclaved aerated concrete (AAC); is a porous building material obtained by the hardening of the mortar formed with siliceous sand (quartzite), cement, lime and water mixture under pressure steam. 84% of its structure consists of pores containing stagnant air. It is the dry air squeezed into these small pores, which provides aerated concrete to have a high thermal insulation and to be the lightest building material. After mixing quartzite which is grinded in the mills, cement and lime in the mixer, aluminum powder is added and poured into molds called forme. Aerated concrete mortar gains porous structure by reacting with the aluminum powder of the heat released from the reaction of lime and water. This resulting soft and porous substance is called a cake. After this step, the cake that are cut with a millimeter precision in the desired dimensions in the cutting line are kept in high pressure hot steam ovens where it hardenes and gains strength.