METHOD FOR PRODUCING ASH AND SLAG CONCRETE Russian patent published in 2015 - IPC C04B40/02 C04B28/26 C04B28/08 C04B111/20 

FIELD: chemistry.

SUBSTANCE: invention refers to construction materials industry and can be used in making building units and structures. In the method for producing concrete involving dispensing a filling agent and binding components, mixing them, moulding the units and hardening, the filling agent is presented by non-utilisable ash and slag mixture produced by Kansk-Achinsk brown coal combustion at Irkutsk Central Heating and Power Plant TETs-6 at a crushability strength Cr=12.5-15.3%, a true density of ρ_t=2,320-2,490 kg/m³ and percentage of other impurities=2.65-4.78% in fraction ratio, %: fr. 5 mm 11.2, fr. 2.5 mm 19.4, fr. 1.25 mm 17.1, fr. 0.63 mm 25.2, fr. 0.315 mm 14.3, fr. 0.14 mm and less than 12.8; the binding agent is a binding agent containing flue ash II field produced by Kansk-Achinsk brown coal combustion at Irkutsk Central Heating and Power Plant TETs-7 at a crushability strength of ρ_t=2,610-2,830 kg/m³ and percentage of other impurities=3.4-5.6%, and liquid glass produced of ferrosilicone waste from Bratsk Ferroalloy Plant that is silica fume having a crushability strength of 2,170-2,390 kg/m³ and a content of crystalline impurities of 7-11 wt %, with a silica ratio of n=0.8-1.3 and density ρ=1.37-1.39 g/cm³ in the following proportions, wt %: above flue ash II field 19.4-20.9, above non-utilisable ash and slag mixture 58.2-62.7, above liquid glass 16.4-22.4; the items are moulded by vibration, then kept for 1 h in the air-dry environment at a temperature of 15-25°C, and hardened by curing at a temperature of a 80±5°C for 2+4+2 h.

EFFECT: higher strength and reduced length of the technological process.

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