METHOD OF PRODUCING HEAT-INSULATING FOAMED GLASS-CERAMIC MATERIAL Russian patent published in 2013 - IPC C04B38/02 

FIELD: chemistry.

SUBSTANCE: invention relates to production of heat-insulating foamed building materials. Finely ground rock is mixed with mineral binder, correction additives, a foaming agent and water. The rock used is gaize, the mineral binder is slag-portland cement, the stabilising additive is a mixture of polyacrylamide gel and carbamide-formaldehyde liquid, taken in ratio of 1:1, and the fluxing agent is low-melting frit. The foaming agent is foaming agent PO-6TS or PB-2000. Before mixing, the gaize and frit are ground to specific surface area of 3500-4000 cm²/g. The stabilising additive is used to prepare foam. The moulded articles are fired at temperature of 950°C. Components of the initial mixture are in the following ratio, wt %: rock - 45.5-47.0; mineral binder - 6.5-7.0; stabilising additive - 0.8-0.9; fluxing agent - 15.0-17.0; foaming agent - 0.6 5-0.7; water - the balance.

EFFECT: low heat conductivity and sorption moistening, high strength and wider raw material base for producing foamed glass-ceramic articles.

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