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The natural gypsum powder includes anhydrous gypsum and CaS04.2H2O, if you want to commercialize the gypsum powder, you should adopt the CaS04.2H2O, after removing part of water by heating, it will become CaS04.1/2 H20. CaS04.1/2 H20 is the final product which you can use it to produce gypsum board other gypsum product. After calcining, CaSO4.1/2H2O is widely used in paper faced gypsum board and gypsum block and construction painting gypsum powder and model.
Fiber Cement Board/ Calcium Silicate board(pressure board) is a new construction material which has been pulping, molding, compression, maintenance and so on. It is based on cement and assist with proper fiber reinforced material. The products are widely used in variety kinds of industrial and domestic construction fields such as external, internal walls, ceilings, sound insulation, and waterproof board for special facility. Combined with keel and filler, it also can used for some framework light board system construction, high-rise building, old building renew, light type work shop, control room and laboratory. Because of its good features like less building cycle, less energy, notable economic benefit, fiber reinforced cement board are favorable all over the world.