CRUSHED STONE MASTIC ASPHALT CONCRETE MIXTURE AND METHOD OF ITS PRODUCTION Russian patent published in 2013 - IPC C08L95/00 C04B26/26 C04B24/12 C08K13/02 

FIELD: construction.

SUBSTANCE: mixture includes crushed stone, sand of grinding siftings, a mineral powder, bitumen, a mixture of rubber thermoelastoplastic and a fibrous cellulose additive, an adhesive nitrogen-containing additive. The ratio of the components is as follows, wt %: crushed stone - 65.0-75.0, sand of grinding siftings - 5.0-17.0, mineral powder - 10.0-20.0, bitumen - 5.5-7.5, rubber thermoelastoplastic - 0.2-0.6, fibrous cellulose additive - 0.2-0.6, adhesive additive - 0.05-0.15. The volume ratio of the rubber thermoelastoplastic and the fibrous cellulose additive makes accordingly 30-70% and 70-30%. When making the asphalt-concrete mixture, crushed stone, sand from grinding siftings and mineral powder are introduced into an asphalt mixer and mixed. Then the mixture of the rubber thermoelastoplastic and fibrous cellulose additive is introduced. Then bitumen is introduced. Besides, the mixture of the rubber thermoelastoplastic and the fibrous cellulose additive is produced by mixing in process of transportation along a helical conveyor. The adhesive additive is introduced into bitumen prior to its supply into the asphalt mixer.

EFFECT: increased homogeneity of a crushed stone and mastic asphalt concrete mixture and crused stone and mastic asphalt concrete, its long-term water resistance and durability.

2 cl, 4 tbl, 3 ex