USE OF COKE AS A BITUMEN MODIFIER Russian patent published in 2021 - IPC C08L95/00 C08K3/00 C04B26/26 

FIELD: construction industry.

SUBSTANCE: invention relates to the field of construction, in particular to a method for manufacturing a modified bitumen binder, a composition of bitumen binder and the use of calcined fine coke in the manufacture of asphalt concrete mixtures used for road surfaces, rolled roofing and membrane technologies for the protection of buildings and bridges. The method is carried out by introducing a modifier into the bitumen, and calcined fine coke with a moisture content of no more than 1 wt. % is used as the modifier. Moreover, the amount of fine coke in the composition is 7-14 wt. % of the mass of bitumen.

EFFECT: creation of a modified binder based on bitumen with improved properties by introducing coke into bitumen, which ensures the stability of the surface layer on the road surface being laid, slows down the aging processes, increases the viscosity, strength and performance characteristics of the roadway, and also makes it possible to achieve shear stability with an optimal content of crushed stone and a modifying additive, plastic fluidity at low temperatures, it has a greater resistance to destructive load and makes it possible not to use mineral powder without deterioration of the properties of the resulting asphalt concrete coating.

7 cl, 2 tbl