CAST ROAD CONCRETE MIX FOR BRIDGE DRIVE WAY COVERING Russian patent published in 2008 - IPC C04B26/26 

FIELD: construction.

SUBSTANCE: cast asphalt mix for drive way covering of bridge contains the following components - ballast stone, sand, mineral powder and binding agent. It also comprises additional mineral component such as sand resulted from rock granulation screening and polymer bitumen as binding agent, wt %: bitumen "BND90/130" - 87-91%, styrene-butadiene-styrene block-copolymer "Kraton D-1101SM" - 9-13% under the following ratio of components, wt %: ballast stone - 35-41, sand resulted from granulation screening - 10-20, sand - 6-16, mineral powder - 20-26, sand resulted from granulation screening - 10-16.

EFFECT: high long-term operational characteristics of covering preventing formation of defects such as tracks on driving lines and waves along longitudinal section of road.

3 tbl, 3 ex, 2 dwg