ASPHALT-CONCRETE MIXTURE Russian patent published in 2017 - IPC C04B26/26 C04B111/20 

FIELD: chemistry.

SUBSTANCE: invention refers to technology for production of road-building materials, namely, asphalt-concrete mixtures for construction and repair of motorroads, building of hydrotechnical facilities, civil building. Asphalt-concrete mixture including bitumen, mineral material in the form of carbonate rock of 5-20 mm fraction and carbonate rock sifting of 0-10 mm fraction contains mineral powder, which is a mixture of sludge from chemical water treatment units of enterprises with waste molding mixtures of foundry in ratio 0.1-0.5:1.0, adhesion additive in quantity of 0.3-1.5 wt.% of bitumen weight produced by interaction of vegetable oil phosphatides, polyethylene polyamine, caprolactam in paraffin melt at 160-180°C in ratio 1.0-1.3:0.8-1.0:0.2-0.4:1.0 with subsequent melting of the mixture of above adhesive additive and bitumen at 140-160°C, melt homogenization for 1-2 min, mixing with dry component mixture heated to 130-150°C, with the following component content in the asphalt-concrete mixture, wt.%: bitumen (based on weight of dry component mixture) 4.5-7.0, breakstone of carbonate rock of 5-20 mm fraction 30.0-50.0, mineral powder, i.e. mixture of sludge from chemical water treatment units with waste molding mixtures of foundry in ratio 0.1-0.5:1.0 1.0-10.0, sifting of carbonate rock being the rest.

EFFECT: increased asphalt-concrete density, strength at temperature of +50°C, improved adhesion of bitumen bonding agent to mineral fillers and powder, lowered water saturation of asphalt-concrete mixture.

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