FIELD: road building, bitumen compositions containing polymer additives.
SUBSTANCE: claimed composition contains mixture of bitumen and syndiotactic 1,2-polybutadiene with syndiotactic degree of 30-70 %, containing 70-93 % of 1,2-units and having weight average molecular mass from 8000 to 120000, in 1,2-polybutadiene/bitumen ratio of 1-7 mass pts/100 mass pts, respectively.
EFFECT: bitumen compositions of increased quality; asphalt coverings of improved cracking resistance and prolonged operating life.
4 cl, 1 tbl, 7 ex
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