METHOD OF PRODUCING COLD ASPHALT CONCRETE MIXTURE Russian patent published in 2015 - IPC C04B26/26 C08L95/00 

FIELD: chemistry.

SUBSTANCE: invention relates to road construction, specifically to preparation of asphalt concrete mixtures for pothole patching and constructing bases and surfaces of roads. The method of producing a cold asphalt concrete mixture includes depositing a binder cover made of modified bitumen on hot coarse particles of the mineral part of asphalt concrete. The binder cover on the particles of the mineral part of the mixture is asphalt binder obtained by pelletizing coarse particles of the mineral part of the mixture with mineral powder in the presence of modified bitumen, the bitumen modifier being spent engine oil used in amount of 15-25% of the mass of bitumen, and content of the mineral powder in the asphalt concrete mixture is 50% of the mass of the mineral part of the mixture.

EFFECT: method enables to obtain material with high strength and longevity, low requirements for the grain size composition of the mixture, longer storage life without loss of operational properties and low susceptibility to caking.

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