COMPOSITION OF BITUMEN COMPOSITION FOR ASPHALT-CONCRETE SURFACES Russian patent published in 2010 - IPC C08L95/00 

FIELD: construction.

SUBSTANCE: invention relates to composition of bitumen composition for asphalt-concrete surfaces, including a mixture of bitumen and syndiotactic 1,2-polybutadiene with average molecular weight from 8 thousand to 120 thousand, extent of syndiotacticity from 30 to 70%, content of 1,2-links from 50 to 95%, with content of syndiotactic 1,2-polybutadiene in bitumen composition from 1 to 5 wt parts/100 wt parts of bitumen, at the same time additionally plasticising additive is used in composition of bitumen mix in amount from 5 to 15 wt parts/100 wt parts of bitumen, made of mixture of mineral oil and ot-olefins at the mass ratio of components 10:1-10.

EFFECT: improved operational properties of bitumen compositions, increased crack resistance of asphalt-concrete surfaces produced on their basis, increased service life of asphalt-concrete coats.

2 cl, 7 ex, 1 tbl