CONCRETE MIX Russian patent published in 2022 - IPC C04B28/04 C04B111/20 

FIELD: building.

SUBSTANCE: invention relates to building, in particular, to a composition of a concrete mix, and can be used for monolithic concreting of protective structures subjected to shock loads. Concrete mix contains, wt.%: portland cement CEM I 42.5 N 11.3 to 13.2, quartz sand 63 to 71, polyacrylic acid-based hyperplasticiser 0.5 to 0.8, silica flour 2 to 3, crushed dolomite screening 2.5 to 3.5, amorphised silicon dioxide produced by hydrolysis of rice straw followed by calcination at 600°C 6 to 8, water the rest. When preparing the concrete mix, silica flour, crushed dolomite screening, and amorphised silicon dioxide are ground jointly with the Portland cement and the hyperplasticiser to a specific surface area of 530 to 580 m²/kg.

EFFECT: higher impact strength and compressive strength, lower vapour permeability of concrete.

1 cl, 2 tbl