COMPOSITION AND PROCEDURE FOR FABRICATION OF NON-FIRED CHAMOTTE HEAT RESISTANT CONCRETE Russian patent published in 2009 - IPC C04B28/26 C04B40/00 B82B3/00 C04B111/20 

FIELD: building.

SUBSTANCE: invention refers to production of building materials and can be implemented at fabrication of items out of chamotte non-fired heat resistant concretes produced without preliminary firing. The composition for manufacturing of non-fired chamotte heat resistant concrete contains, wt %: chamotte filler 70-91, fine ground chamotte 6-20, sodium silicate-block in form of nano-dimension particles 1-4, fine ground cristobalite 2-6, and water from calculation W/T 0.12-0.14. The procedure of fabrication of non-fired chamotte heat-resistant concrete out of the above said composition consists in conversion of sodium silicate-block into nano-dimension particles by means of dehydration dispersion of hydrated sodium silicate-block fine ground to specific surface of 2500-3000 cm²/g at temperature 200-600°C, in mixing chamotte filler, fine ground chamotte and cristobalite and in addition to their mixture, while mixing, of water mixture of sodium silicate- block in form of nano-dimension particles with temperature 80-90°C, and then in addition of water with temperature 80-90°C, in mixing the produced mixture, in moulding items out of it and in treatment of items with thermo-shock at temperature 250-300°C during 1-2 hours. Also fine ground cristobalite is produced by means of dry grinding.

EFFECT: increased strength.

3 cl, 1 ex, 1 tbl