METHOD OF PRODUCING CONCRETE Russian patent published in 2012 - IPC C04B40/00 C04B28/26 C04B111/20 

FIELD: chemistry.

SUBSTANCE: invention relates to the industry of building materials and can be used when making construction products and structures from concrete. In the method of producing concrete, involving preparation of an aluminosilicate binder component, feeding an aggregate and binder components, mixing, moulding articles, ageing and solidification thereof, the aggregate used is screenings from grinding diabase with crushing strength Cr=8, packed density ρ=1560-1585 kg/m³ and fineness modulus M_f=3.6-3.9, with the following ratio of fractions, %: 5-10 mm - 15.1-47.3, 1.25-2.5 mm - 22.8-33.1, 0.315-0.63 mm - 7.8-46.2, 0.14 mm and less - 4.0-16.3, and the binder used consists of 50 wt % field II flue ash and 50 wt % waste ash-slag mixture obtained when burning brown coal from KATEK at Bratsk Thermal Power Plant, and liquid glass produced from large-tonnage ferrosilicon wastes from Bratsk Ferroalloy Plant - microsilica, with packed density of 180-200 kg/m³ and containing up to 10-15 wt % impurities, with silica modulus n=0.9-1.3 and density ρ=1.28-1.42 g/cm³ with the following ratio of components, wt %: said field II flue ash 10.75-10.94, said waste ash-slag mixture - 10.75-10.94, said diabase screenings - 64.50-65.64, said liquid glass - 12.48-14.00; preparation of the aluminosilicate component involves mixed grinding in a ball mill of ash and the waste ash-slag mixture for 20 minutes; moulding is carried out by vibration, after which ageing is carried out for 6 hours in air-dry conditions at temperature of 18-20°C, and solidification is carried out by steaming at temperature of 85°C in the 2+4+2 hour mode.

EFFECT: high strength of the concrete and shorter duration of the technological process.

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