METHOD OF PRODUCING COMPOSITE BITUMEN BINDER FOR ROAD CONSTRUCTION Russian patent published in 2024 - IPC C04B40/00 C04B26/26 C08L95/00 C08K7/02 

FIELD: construction.

SUBSTANCE: invention can be used in construction and road works. Method of producing a composite bitumen binder involves adding to heated bitumen particles of microfibrillar cellulose, which are pre-mixed with a wetting agent. Wetting agent used is water taken in 100-fold weight excess relative to microfibrillar cellulose particles. Particles of microfibrillar cellulose have average diameter of microfibrils 200–400 nm and length of 100 mcm. Obtained mixture of bitumen with microfibrillar cellulose particles is mixed at temperature of 60–80 °C and held in a heated state until complete evaporation of water.

EFFECT: invention increases operating temperature of the bitumen binder, rutting resistance of the coating obtained on its basis, as well as improves the environmental friendliness of the process of manufacturing the binder.

1 cl, 1 dwg, 1 tbl, 5 ex