METHOD FOR REPAIR OF ASPHALT CONCRETE COATS IN WINTER CONDITIONS AND COMPOSITE MIXTURE OF MATERIALS FOR ITS REALISATION Russian patent published in 2009 - IPC E01C7/10 

FIELD: construction, road engineering.

SUBSTANCE: invention is related to the field of motor roads with asphalt concrete coat, in particular, to preventive repair of defects and pits on road surface. Method for repair of asphalt concrete coats in winter conditions consists in production of pothole filling repair of road surfaces at temperature of air up to -10°C with hot asphalt concrete road mixture based on viscous or liquid road bitumens, which is laid into previously heated defect area. Repair of coats at air temperature of up to -10°C is carried out in the following sequence: defect area of coat is treated with 30% aqueous solution of calcium chloride as 0.5 litre of solution per one square metre of treated surface, treated area is filled with preset amount of liquid sodium glass that additionally contains 8% of carbamide, specified amount of previously prepared dry mixture of sand and cement is poured into liquid glass filled into pit, moreover, as a result of their mixing, mixture of materials is immediately stiffened and hardened, afterwards surface of repaired coat section is treated with 30% aqueous solution of calcium chloride, is coated with liquefied bitumen and powdered with sand. Composite mixture of materials is also described, which is hardened on above-described method.

EFFECT: creation of method for repair of asphalt concrete coats in winter conditions.

2 cl