Autoclaved fly ash brick refers to fly ash brick made of fly ash, lime or cement as the main raw material, mixed with appropriate amount of gypsum and aggregate by mixture preparation, compression molding, high pressure or normal pressure curing or natural curing. . Fly ash and lime are used as the main raw materials, and appropriate amount of gypsum and aggregate are added, which is formed by blank preparation, compression molding and high pressure steam curing, and is referred to as fly ash brick.
The compressive strength of autoclaved fly ash bricks is generally high, reaching 20 MPa or 15 MPa, at least 10 MPa, and can withstand the antifreeze requirements of 15 freeze-thaw cycles. In addition, fly ash brick is a potentially active hydraulic material that can continue to produce hydration reaction in a humid environment, which makes the internal structure of the brick more dense and is beneficial to the improvement of strength.
