CONCRETE MIXTURE AND ADDITIVE "LIGNOPANE B-2" FOR CONCRETE MIXTURE Russian patent published in 2005 - IPC

FIELD: concrete composition, cement modified with additive and additive for concrete mixture.

SUBSTANCE: claimed additive contains (mass parts): Lignopane with molecular weight of 10-50 kDa 10-20; antifoaming additive 139-282 0.02-0.06; superplasticizer 0-40; additionally sodium thiosulfate and/or ammonium or sodium rhodanide 40-45; sodium carbonate 1-2. Additive content is 0.6-1.5 % calculated as cement mass. Concrete mixture may comprise (kg/m³) cement 300-520; filler 1590-2030; water 105-200; coarse filler (chip and/or gravel of grade 5-20 mm or 5-40 mm) and/or fine filler (sand of fineness not more than 5 mm). As fine filler at least one component selected from group containing quartz sand, sand from igneous formation, sand from metamorphic formation, haydite sand, and sand from blast-furnace dross is used. As coarse filler at least one component selected from group containing chip from igneous formation, chip from metamorphic formation, chip from sediment, chip from blast-furnace dross, etc. is used. Composition of present invention is useful in building industry for production of monolith and precast concrete and reinforced concrete construction, etc.

EFFECT: concrete mixture accelerated set and curing; concrete of improved strength.

9 cl, 2 tbl