ASPHALT-CONCRETE MIX Russian patent published in 1997 - IPC

FIELD: building materials industry, more particularly, composition for making asphalt concrete for automobile roads, aerodromes, bridges and hydrotechnical structures. SUBSTANCE: mix comprises (%): 6.0-8.0 bitumen; 0.2-2.0 spent swollen elastomeric sorbent for setups for purification of industrial sewage from petroleum products in elastomeric crumb to petroleum products ratio of from 1:1 to 1:3; and mineral filler, the balance. Asphalt concrete prepared from mixture comprising 6.65 % bitumen; 0.35 said sorbent and 93.0 mineral filler has the following properties: water saturation is 0.29 vol %; swelling is 0.0 vol %; average density is 2.39 g/cubic cm; ultimate compressive strength at 20 C is 4.9 MPa; at 50 C is 2.17 MPa; at 0 C is 8.0 MPa; water resistance is 1.06; water resistance coefficient during prolonged water saturation is 0.88. EFFECT: improved properties of the asphalt-concrete mix.