METHOD OF PREPARING ASPHALT-CONCRETE MIXTURE Russian patent published in 2020 - IPC C04B26/26 C04B40/00 C04B111/20 C04B111/27 

FIELD: construction.

SUBSTANCE: invention relates to production of road-construction materials, particularly, to asphalt-concrete mixtures preparation methods. In the method of preparing the asphalt-concrete mixture consisting in mixing bitumen at temperature of 130–150 °C, mineral aggregates treated with a cold modifier by sprinkling or spraying, and mineral powder, treatment of mineral aggregates with modifier is carried out directly on conveyor belt to drying aggregates, wherein modifier used is a suspension of iron (III) hydroxide - sediment of a station of deferrization of underground water, containing, %: water 85–90 with content of iron (III) oxide 90–95 in the dry substance and silicon and aluminium oxides 5–10, in amount of 0.6–1.2 % by weight of mineral filler weight, and drying and heating of treated mineral aggregates is carried out simultaneously in drying drum at temperature 130–150 °C.

EFFECT: technical result is improved operational properties, such as strength, water resistance, reduced water saturation, as well as reduced negative impact on environment.

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