METHOD FOR CONCRETING AT SUBZERO TEMPERATURES

摘要

FIELD: construction industry.;SUBSTANCE: invention relates to construction industry and can be used in the production of reinforced concrete and concrete monolithic structures of buildings and facilities at an accelerated rate of their construction and work implementation at negative temperatures. The method for concreting at negative temperatures consists in adding the ground conductive mineral shungite to the building mixture- that of Class B30 concrete and exposing them to an electric field created by passing a direct electric current through the building mixture by connecting electrodes. At the same time, the content of the conductive mineral shungite is 1-10% of the weight of the Portland cement that is part of the building mixture, the degree of grinding of shungite being 200-400 m²/kg. ;EFFECT: invention is aimed at increasing the rate of concrete strength gain at negative temperatures.;1 cl, 1 dwg, 1 tbl