ASPHALT-CONCRETE MIXTURE FOR ROAD BUILDING Russian patent published in 2003 - IPC

FIELD: road building. SUBSTANCE: asphalt-concrete mixture for road building comprises bitumen, slag of electric steel smelting production of fraction 0-15 mm being with amount of particles of fraction 0.071-0.14 mm 24.5-25.7 wt.-%, fraction less 0.071 mm 10-11 wt.-% and sandy-rubble mixture of quartzite-sandstone of fraction 0-155 mm that is waste from mining-enriching production as a filling agent and these components are taken in the following ratio, wt.-%: bitumen, 7.4-8.3; slag of electric steel smelting production of fraction 0-15 mm, 39.0-44.0; sandy-rubble mixture of quartzite-sandstone of fraction 0-155 mm, 47.7-53.6. Invention provides enhancement of compression strength at 20 and 50 C, strength after cycles of freezing-thawing and can be used for making covers of automobile roads. EFFECT: simplified technology, reduced cost. 2 tbl