METHOD OF PRODUCING COLD ASPHALT CONCRETE MIXTURE Russian patent published in 2024 - IPC C04B26/26 C08L95/00 

FIELD: road construction.

SUBSTANCE: invention relates to road construction, specifically to the technology of preparing cold asphalt concrete mixtures for repairing road surfaces and sidewalks. Method of producing cold asphalt concrete mixture includes preliminary preparation of petroleum coke and brittle bitumen ground to finely dispersed state, then without heating mineral materials are mixed and light fuel oil heated to 60 °C is introduced into the prepared mixture, wherein fine brittle bitumen is used with content of asphaltenes of not less than 35 %, softening temperature according to ball and ring method not lower than 110 °C, needle penetration depth at 50 °C is not more than 7 units, and light fuel oil – with relative viscosity RV₅ 60 °C 10–17 s, with the following ratio of components, wt. %: mineral materials 93 %, finely dispersed petroleum coke 7 %, finely dispersed brittle bitumen – 3.5 % above the weight of mineral materials and fine coke, light fuel oil from atmospheric distillation of oil – 4.0 % above the weight of mineral materials and fine coke.

EFFECT: obtaining cold asphalt concrete with high water resistance at compliance with other quality parameters with simultaneous utilization of low-liquid products of oil refining, reducing power consumption and ensuring environmental safety.

1 cl, 9 tbl