METHOD OF PRODUCING CRUDE MIXTURE FOR MAKING FOAM CONCRETE Russian patent published in 2013 - IPC C04B38/02 B82B3/00 

FIELD: chemistry.

SUBSTANCE: invention relates to the industry of building materials and specifically to production of foam concrete. The method of producing a crude mixture for making foam concrete involves preparing a dry mixture from 500 DO portland cement and quartz sand, which is pre-dried and ground to specific surface area of not more than 2400 cm²/g, and simultaneously mixing with said portland cement in a mechanical activator, structuring water and adding a modifying additive - a combination of aluminosilicate microspheres and one- or multi-layered carbon nanotubes in ratio of 1:10, adding the obtained aqueous solution to the dry mixture and mixing for 5 minutes, adding aluminium powder, caustic soda and mixing for 3 minutes, with the following ratio of components, wt %: 500 DO portland cement 20-75, quartz sand 20-75, said modifying additive 0.1-6.0, aluminium powder 0.007-0.5, caustic soda (per dry substance) 0.0005-0.005, water - the balance. In the method of producing a crude mixture for making foam concrete, polypropylene or metal fibre can be added to the mixture in amount of 0.003%.

EFFECT: high safety of producing the crude mixture, high strength and frost-resistance of foam concrete.

2 cl, 1 ex, 3 tbl