METHOD FOR INHIBITION OF GYPSUM AND CEMENT LINING BUILDING MATERIALS FOR OPERATION AT NEGATIVE TEMPERATURE Russian patent published in 1997 - IPC

FIELD: lining of wall and partition at negative temperature. SUBSTANCE: method involves mixing water with dry adhesive composition which comprises mineral binder and solid technical lignosulfates. Semihydrous gypsum or cement is used as mineral binder, carboxymethyl cellulose is additionally added in dry adhesive composition before its mixing with water takes place. Adhesive composition comprises, mas. %: gypsum binder, 94.5-96.7; carboxymethyl cellulose, 3-5; solid lignosulfates, 0.3-0.5, ratio of water and gypsum being 0.5-0.7. If cement binder is used then composition comprises, mas. %: cement, 20-30; quartz sand having fraction up to 1.2 mm, 52.85-56.7; ground sand having specific surface more than 1500 qu cm/g, 15-20; carboxymethyl cellulose, 2-3; solid lignosulfates, 0.15-0.3. When adhesive composition is mixed with water then antifreezing agents are added into it. Organosilicium liquid, preferably ethyl- or methylsiliconate of sodium, and denatured ethyl alcohol are used as antifreezing agent. Antifreezing agent comprises, wt.p.: water, 1.0; organosilicium liquid, 0.01-0.06; denatured ethyl alcohol, 0.01-0.14. EFFECT: improved efficiency. 11 cl, 1 tbl