Fire protection with Gypsum Blocks
Gypsum is a mineral and non-combustible building material [Building Material Class A1 in accordance with DIN 4102]. In a case of fire, with gypsum building units, the flames find no support – or in technical terms: gypsum does not increase the thermal load in buildings.
Gypsum is a mineral building material with the chemical formula CaSO4·2H2O, consisting of calcium sulphate and water [dihydrate]. The two water molecules are not chemically bonded but are stored in the interstices of the structure and form a share of up to 20 % of the total building unit. Under the effect of heat of a fire the gypsum is dewatered. The crystal water vaporises and with this draws energy from the fire.
The homogeneous gypsum blocks consisting of gypsum with 100 mm thickness can, for example, resist the fire for three hours, without the electrical sockets also tested in parallel even for four hours.