RAW MIXTURE FOR MAKING HEAT-RESISTANT ASH-SLAG CONCRETE Russian patent published in 2009 - IPC C04B28/08 C04B28/26 C04B111/20 

FIELD: chemistry.

SUBSTANCE: invention relates to the industry of construction materials and can be used in making structures and objects from heat-resistant concrete based on ash-slag filler and allows for efficient use of multitonnage industrial wastes. The raw mixture for making heat-resistant ash-slag concrete contains, wt %: 35.0 to 60.0 filler - dump ash-slag mixture from Irkutsk thermal power plant 6 in Brask, from burning brown coal from KATEK Irsh-Borodin open-pit coal mine with packed density of the ash-slag mixture ρ_pack=1350-1400 kg/m³, consisting of 10% ash and 90% slag, with particle size from 0.315 to 5.0 mm and moisture from 2 to 3% with the following fractions in the given ratios, %: 5 mm fraction - 22.44, 2.5 mm fraction - 29.56, 1.25 mm fraction - 12.44, 0.63 mm fraction - 25.56, 0.315 mm fraction - 10.0, and binder from flue ash from burning brown coal from Kansko-Achinsky thermal power plant 7, Bratsk field 1 with ρ_pack=800-850 kg/m³ and sieve No.008 residue - 6.7%, 17.8 to 38.9, and liquid glass from wastes from production of ferrosilicon at the Bratsk ferro-alloy - microsilica production factory with ρ_pack=230-245 kg/m³ and containing fine grained crystalline impurities in form of graphite and β-carborundum in amount ranging from 10 to 13%, with silica module n=1 and density ρ=1.32-1.35 g/cm³, 20.0 to 30.2.

EFFECT: increased fire resistance of concrete with simultaneous simplification of the production process, reduced cost of the final product.

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