FIELD: manufacture of building materials, dry building mixes in particular; industrial and civil construction engineering for covering various internal surfaces of buildings.
SUBSTANCE: proposed dry building mix contains the following components, mass-%: according to first version -calcium sulfate of α- or β-form, 38-58; shungite sand of variety III, 40-60; hydrated lime, 2-4; modified additive, 0.23-0.37 including methyl cellulose, 0.10-0.12; starch ether, 0.1-0.2; tartaric acid, 0.03-0.05; according to second version - cement, 30-45; shungite sand, 50-65; hydrated lime, 2-4; dispersed powder on vinyl acetate and ethylene copolymer, 0.5-5; methyl cellulose, 0.02-0.4; according to third version - calcium sulfate, 40-60; shungite sand, 35-55; dispersed powder, 0.1-2; methyl cellulose, 0.2-0.4; according to fourth version - cement, 28-35; shungite sand, 65-72; dispersed powder, 2-5; methyl cellulose, 0.2-0.3. Shungite sand is used in fractions of from 0,2 to 0.63 mm.
EFFECT: improved adhesion, strength and binding properties of coat at retained low intensity of radiation passing through surface covered with this coat.
8 cl, 8 tbl
