METHOD OF CONCRETING AT NEGATIVE TEMPERATURES AND FERROMAGNETIC ADMIXTURE FOR CONCRETE Russian patent published in 2018 - IPC C04B14/48 C04B20/10 C04B40/00 C04B40/02 

FIELD: construction.

SUBSTANCE: method of concreting at negative temperatures consists in adding particles of sludge from steelmaking, coated with a polyethylene shell, into construction mixture in an amount from 2 to 10% of the total weight of the construction mixture, and the impact of pulsating electromagnetic field on said particles; the exposure time depends on the ambient temperature and the volume of the construction mixture. A ferromagnetic admixture for concrete contains particles of sludge from steelmaking, coated with polyethylene shell.

EFFECT: increasing the strength of structures and reducing the negative impact of concrete admixtures on the environment.

2 cl, 2 dwg