BITUMEN COMPOSITION FOR ROAD, ROOFING AND INSULATING WORK, AND ASPHALT-CONCRETE MIX BASED THEREON Russian patent published in 2002 - IPC

FIELD: mine field of application. SUBSTANCE: bitumen composition comprises bitumen and dispersive rubber-containing phase. Composition further comprises mixture of compound or compounds selected from group of nitrons capable of forming stable radicals, and peroxide compound. Rubber is present in the form of distructurized particles and destruction product thereof present in amount of at least 0.5 wt. % calculated for rubber prior to destruction. Rubber particles contain unsaturated bonds in amount of at least 2% of total number of bonds composition further comprises mixture of said nitron and peroxide compound at nitron to peroxide compound from 1: 1 to 10: 1, respectively. Said compounds are used in following amounts, wt. %: said mixture from nitrons and peroxide compound, 1-2; said mixture from rubber and destruction products thereof, 5-30; and bitumen, up to 100. Bitumen composition further comprises finely dispersed filler up to 20 wt. % of total weight of composition. Composition is useful in asphalt-concrete mixture in amount of 5-20 wt. %, and mineral filler, the balance usually useful for standard and cast mixtures in road work. EFFECT: processibility and stability of bitumen composition and asphalt-concrete mix based thereon. 4 cl, 1 tbl