PROCESS FOR PRODUCING GYPSUM BUILDING MATERIALS

A process for producing lightweight, panel or block-shaped gypsum building materials with a pore structure, in particular wall panels, wherein calcium sulphate alpha-hemihydrate, water in a slightly more than stoichiometric quantity, setting retarders and/or accelerators and additives are mixed to f...

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Bibliographische Detailangaben
Hauptverfasser:	KIEKER, JOACHIM, MUSEBRINK, OLAF, HESSLER, KLAUS M, KOSLOWSKI, THOMAS
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE LIME, MAGNESIA METALLURGY PERFORMING OPERATIONS REFRACTORIES SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER SLAG TRANSPORTING TREATMENT OF NATURAL STONE WORKING CEMENT, CLAY, OR STONE
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Beschreibung
Zusammenfassung:	A process for producing lightweight, panel or block-shaped gypsum building materials with a pore structure, in particular wall panels, wherein calcium sulphate alpha-hemihydrate, water in a slightly more than stoichiometric quantity, setting retarders and/or accelerators and additives are mixed to form a pourable suspension and subjected to suitable forming. The ground calcium sulphate alpha-hemihydrate, having a Blaine specific surface area greater than 2000 cm2/g, is combined if appropriate, with calcium sulphate beta-hemihydrate in a quantity of up to about 30% by weight relative to the calcium sulphate alpha-hemihydrate, and mixed before forming with a surfactant foam of a defined apparent density in the range from 40 to 80 kg/m3 and a uniform defined pore size, in a quantity for adjusting the apparent density of the gypsum building material to a defined value in the range from 300 to 1200 kg/m3.