METHOD OF RECYCLING SPENT ASPHALT CONCRETE Russian patent published in 2017 - IPC C04B24/24 C04B28/02 C04B18/04 C04B111/34 

FIELD: construction.

SUBSTANCE: invention relates to methods of recycling waste of construction materials and can be used as fillers and modifying additives for concrete of road construction: curbs, paving slabs, coating of lower bases of roads. Method of recycling of spent asphalt concrete consists in that mineral phase, such as crushed stone, sand, microfiller is separated from organic phase by chemical method by introduction of kerosene in spent crushed asphalt concrete, taken at weight ratio: spent asphalt concrete, in terms of bitumen, to kerosene as 1:2, 3 with subsequent settling for one day and mixing, all content in mixer is drained on sieve with cells diameter of 0.08 mm and bitumen solution in kerosene passed through sieve with density of 0.8 g/cm³ is taken as modifying additive for concrete with rate of 2–4 % of mass of cement, mineral cement is added to phase of designed grade of concrete.

EFFECT: technical result is cheap and simple process of recycling spent asphalt concrete by separating mineral phase (crushed stone, sand, microfiller) from organic phase (bitumen-containing), and wider field of use of separated phases as modifying additive and aggregates in cement-containing concretes.

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