METHOD TO PRODUCE ACIDPROOF CONCRETE Russian patent published in 2013 - IPC C04B40/00 C04B28/26 C04B111/23 

FIELD: construction.

SUBSTANCE: in the method to produce acidproof concrete, including dosing of a filler, a microfiller and components of a binder, mixing, moulding of items, hardening, the filler is siftings from diabase grinding with strength grade of 1200-1400, apparent density p=1470-1500 kg/m³ with the ratio of fractions, wt %: fr. 5 mm - 13.8; fr. 2.5 mm - 34.0; fr. 1.25 mm - 25.5; fr. 0.63 mm - 18.1; fr. 0.315 mm - 4.3; fr. 0.14 mm - 4.3, the microfiller is dust from diabase grinding with residue on the sieve No.008 - 2.5-3%, the binder is ash and alkaline binder, containing fly ash from combustion of brown coals from KATEK TPP-7 of Bratsk and liquid glass from ferrosilicium production wastes from Bratsk ferroalloy plant - microsilica, with silicate module n=1 and density of p=1.35-1.39 g/cm³, with the ratio of components, wt %: the specified fly ash - 19.0-21.0; the specified siftings of diabase - 57.0-63.0; the specified dust of diabase - 1.9-2.1; the specified liquid glass - 13.9-22.1, products are moulded by vibration pressing within 1-2 min., hardening - steaming at the temperature of 85-90°C and atmospheric pressure for 8 hours.

EFFECT: increased acid resistance of concrete.

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