METHODS FOR MANUFACTURING LIGHT GYPSUM COMPOSITION WITH INTERNAL FOAM FORMATION AND PRODUCTS MADE FROM IT Russian patent published in 2021 - IPC C04B38/02 C04B40/00 

FIELD: building materials.

SUBSTANCE: group of inventions relates to the field of building materials, in particular to compositions based on gypsum, a method for obtaining a foamed gypsum suspension, a method for obtaining a foamed gypsum product, as well as to a hollow wall system using these compositions. The gypsum-based composition contains a mixture of ingredients per 100 mass parts of these ingredients on an anhydrous basis, wt %: calcium sulfate semihydrate 50-96. 9, cellulose thickener 0.1-10, a mixture of compounds for gas formation containing: calcium carbonate 1.5-46.9, at least one aluminum compound selected from aluminum sulfate and potassium sulfate and aluminum 1.5-30, for the formation of gaseous CO₂. The gypsum-based composition contains a mixture of ingredients per 100 mass parts of these ingredients on an anhydrous basis, wt %: calcium sulfate semihydrate 50-97. 9, cellulose thickener 0.1-10, a mixture of compounds for gas formation containing: zeolite 1-10, sodium percarbonate Na₂CO₃⋅1,5H₂O₂ or hydrogen peroxide in the form of a concentrated aqueous solution 1-10, for the formation of oxygen gas. The group of inventions is developed in independent and dependent claims.

EFFECT: reduced density, improved insulation and mechanical properties.

12 cl, 9 dwg, 10 tbl, 9 ex