METHOD OF PREPARING ASPHALT CONCRETE MIXTURE (VERSIONS) Russian patent published in 2016 - IPC C04B26/26 C08L95/00 C08L97/02 

FIELD: construction.

SUBSTANCE: invention relates to construction materials and articles, namely to a method of preparing asphalt mix. Method of preparing asphalt mix containing bitumen in the amount of 3-9 wt%, hydrolyzed lignin with the fraction from 0 to 2.5 mm with the moisture content of 10-50 % in the amount of 3-10 wt% and a mineral material, which contains crushed stone in the amount of 30-70 wt% and sand from grinding screenings - the rest involves simultaneous feeding hydrolyzed lignin and heated up to 130-150 °C bitumen binder to the mixer with heated up to 130-150 °C mineral material. In another version hydrolytic lignin is fed immediately before injection of the heated bitumen binder to the mixer with the heated mineral material.

EFFECT: technical result is higher strength, shear resistance and crack resistance of the asphalt-concrete mixture, as well as reduced mineral materials heating temperature.

2 cl, 3 tbl, 1 ex