At present, it is widely used to make various gypsum products (such as gypsum board, fiber gypsum board, gypsum hollow board, gypsum decorative board, gypsum block, gypsum ceiling, etc.). By adding various fillers into building gypsum, it is used for the decoration of partition walls, walls and roofs in buildings.
Gypsum board has the property of long-term creep, which is more serious in humid environment. The strength of building gypsum itself is low, and because it is slightly acidic, it cannot be reinforced, so it is not suitable for load-bearing structure. In order to further improve the water resistance of gypsum and expand its application scope, cement, granulated blast furnace slag, lime, fly ash or organic waterproof agent can be added, waterproof cover paper or waterproof polymer material can be used on the surface of gypsum board, and technical measures such as waterproof protection of surface layer can be taken.