COMPLEX STRUCTURED BITUMEN-RUBBER BINDER FOR ROAD SURFACE Russian patent published in 2010 - IPC C04B26/00 C08L95/00 

FIELD: chemistry.

SUBSTANCE: invention relates to production of road construction materials and specifically to binding compositions based on organic binding substances, which can be used in building or repairing roads and aerodrome surfaces. The invention pertains to a complex structured bitumen-rubber binder for road surface, containing devulcanised rubber crumbs and organic binder - construction bitumen, as well as water treatment wastes from oil refineries - floatation oil sludge containing the following, wt %: 50-70 % organic component (including hydrocarbons: methane 75-85%; naphthene 10-20%; aromatic 3-10%); 50-30% inorganic component (including particle size: less than 10 mcm 50-65%; less than 20 mcm 80-85%; less than 100 mcm 95-99%; greater than 100 mcm less than 2%) with specific surface area of 880-920 m²/kg; with moisture of not more than 15-20% (in excess of organic and inorganic components given in the composition), with the following ratio of components, wt %: bitumen 82.5-92.5; rubber crumbs 2.5-7.5; floatation oil sludge 5-10.

EFFECT: longevity of binder with improved rheological characteristics, considerable reduction in cost owing to longer life of the road asphalt coating.

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