METHOD OF PRODUCING POLYMER COLD ASPHALT FROM MILLED OLD ASPHALT CONCRETE Russian patent published in 2019 - IPC C04B26/26 B09B3/00 C04B111/20 

FIELD: construction.

SUBSTANCE: invention relates to road construction materials, particularly to production of cold asphalt all-weather mixture from old asphalt concrete for use in repairing asphalt concrete pavement and obtaining a coating with improved physical and mechanical properties. In the method of producing cold asphalt concrete, asphalt concrete removed from the upper part of the road surface is heated to 40–60 °C, it is mixed with 0.5–5 % of binder, including diesel fuel and modifier, where the modifier contains divinyl styrene thermoplastic elastomer, oil – heat carrier AMT-300, polyethylene polyamine, a mixture of vegetable oil fatty acids, with the following ratio of components, wt%: divinyl styrene thermoplastic elastomer 2–30, oil heat carrier AMT-300 42-91, polyethylene polyamine 3–12, a mixture of fatty acids of vegetable oils 4–16, wherein modifier content in binder is 5–35 %.

EFFECT: simplification of cold asphalt mixture production method, improvement of physical and mechanical properties of asphalt-concrete mixture, as well as asphalt produced from it.

1 cl, 8 tbl