FIELD: building materials.
SUBSTANCE: invention relates to the gypsum composition made of hardened gypsum and to a method for its preparing. The composition made of hardened gypsum comprises the bound matrix unbroken phase made of hardened gypsum having the enhanced volume of empty spaces from water, and/or the indicated composition is prepared from a mixture showing the enhanced ratio of water to calcined gypsum at least 3:1. Also, invention describes an article comprising composition made of hardened gypsum. Invention provides preparing nonshrinking composition of hardened gypsum with reduced density, improved insulating and/or acoustic properties.
EFFECT: improved preparing method and properties of composition.
21 cl, 3 dwg, 2 tbl, 1 ex
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