METHOD OF PRODUCING GRANULATED ASPHALT-BINDING BASED ON PHOSPHOGYPSUM Russian patent published in 2019 - IPC C04B26/26 C08L95/00 C04B18/04 B09B3/00 C04B111/20 C04B111/27 

FIELD: construction.

SUBSTANCE: invention relates to road construction, specifically to the technology of preparing asphalt concrete mixtures for patching road pavement, as well as device bases and road surfaces. In the method of producing granular asphalt-binding material, which includes granulation of mineral powder with binder by rolling, mineral powder used is pre-dried phosphogypsum, as a road binder bitumen with additive of 15–20 % of the weight of the polyethylene terephthalate binder introduced into the bitumen at the melting point of the plastic, granulation is carried out at temperature of not less than 130 °C, but not more than 150 °C, and content of binder in asphalt-binding is 16–20 % of weight of mixture, weight of binder, introduced into bitumen at melting point of plastic, granulation is carried out at temperature of 130–150 °C, and content of binder in asphalt-binding is 16–20 % of its weight.

EFFECT: reducing the prime cost of granulated in asphalt-binding in comparison with material on traditional mineral powder, as well as solving the problem of recycling industrial and domestic wastes.

1 cl, 3 ex, 3 tbl