Gypsum board with fire performance is it?
Gypsum board with light, fire, heat insulation, sound insulation, convenient decoration, etc., but the general performance of the gypsum board fire less, fire gypsum board fire effect is good, generally more than 40 minutes, if accompanied by light steel Keel and fire rock wool produced by the wall of the fire time can be as high as one hour or more.
How the fire rating of building materials is divided. Building decoration materials combustion performance level should be divided into four or more levels. Bayer fire gypsum board can reach A2 level.
Gypsum board with fire, but do not use the gypsum board wall fire, gypsum board support is mainly by two layers of paper, the paper burned after the board on the scattered, if you want to fire recommended calcium silicate board or Fiber cement pressure plate
Gypsum board is the main component of calcium sulfate, chemical formula CaSO4. Melting point 1450 ℃, the relative density of 2.96, insoluble in water. Its dihydrate CaSO4 ? 2H2O is commonly known as gypsum (or gypsum). Hemihydrate CaSO4 ? 1 / 2H2O called plaster (or gypsum). Gypsum is a mineral, for the monoclinic crystal, was plate or fibrous, there are fine lumps, was light gray, reddish, light yellow or light blue. Gypsum heated to 128 ℃, lost most of the crystal water, into a plaster; 163 ℃ above, all the loss of crystal water. The plaster of the plaster is mixed with the plastic, but soon hardened to become gypsum. This process releases a lot of heat and swells, so it can be used for casting models and sculptures including gypsum pliers, with fire resistance.
