BITUMEN BINDER FOR ROAD PAVEMENT Russian patent published in 2005 - IPC

FIELD: manufacture of materials changing physical, chemical and mechanical properties of road, bridge and airfield pavement components.

SUBSTANCE: proposed binder for road pavement contains mixture of bitumen, block copolymer of diene and styrene and additives in form of improved paving bitumen. Craton is used as block copolymer of diene and styrene and oil fraction obtained from direct refining of heavy low-paraffin naphthene base is used as additive; it is characterized by kinematic viscosity at +50°C from 65 to 85 cSt, solidifying temperature below -18°C; binder is characterized by tensibility more than 70 cm at +25°C, elasticity more than 70% at +25°C, softening temperature more than 65°C and viscous-flow state at 135°C.

EFFECT: improved physico-mechanical properties of bitumen pavement.

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