BUILDING COMPOSITION AND POWDERED ADDITIVE FOR BUILDING COMPOSITION (LIGNOPAN) Russian patent published in 2006 - IPC C04B22/08 C04B24/18 C04B28/02 C04B111/20 

FIELD: manufacture of building materials.

SUBSTANCE: in a building composition including (kg/m3) mineral binder (250-600), aggregate (1050-1900), water (120-300), and powdered additive containing Lignopan B1 in amount 0.25-0.45% of the weight of mineral binder, said additive further contains sodium thiosulfate and/or aluminum thiosulfate in amounts 5-11% of the total weight of additive. Mineral binder is selected from Portland cement, Portland blast-furnace cement, lime-silica binder, and gypsum cement-pozzolana binder. Aggregate can be selected from quartz sand with fineness modulus 2.0-3.0 and broken stone fraction 5-400 mm or 5-20 mm mixed with above quartz sand at ratio 1.4:2.0. Building composition is intended for use when preparing concrete or mortar mixes in manufacture of concrete and reinforced concrete parts and units of prefabricated or in-situ construction as well as in construction, operation, and repair of wells.

EFFECT: enhanced waterproofness at reduced consumption of cement and prevented salt formation on parts and units manufactured from claimed composition.

7 cl, 2 tbl