FIELD: chemistry.
SUBSTANCE: composition includes bitumen and not less than 8 wt % of mechanically activated rubber chips with a characteristic size 0.5 mm. In this process, at the temperature of 120-130°C for 20-30 min the composition is exposed to a low-frequency ultrasound with a power density of 0.5-1.5 W/cm3.
EFFECT: increase in the amount of rubber crumb introduced into the composition, a decrease in the bitumen modification temperature and a shortening of the process time, acceleration of the impregnation of the rubber crumb and the production of modified bitumen in the form of a high-quality product.
2 ex
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