STABLE BITUMINOUS EMULSIONS, METHODS OF THEIR FORMATION AND COMPOSITE STRUCTURES FORMED FROM THESE EMULSIONS Russian patent published in 2021 - IPC C04B26/26 C08L95/00 C04B111/20 

FIELD: construction.

SUBSTANCE: said invention relates to bituminous emulsions, composite structures for road surfaces formed from them. The bituminous emulsion contains a base bituminous component present in an amount of about 15 to about 70 wt.% per total mass of the bituminous emulsion, water present in an amount of at least about 25 wt.% per total mass of the bituminous emulsion, oxidized high-density polyethylene present in an amount of about 1 to about 20 wt.% per total mass of the bituminous emulsion, where the oxidized high-density polyethylene has an acidity index of about 5 to about 50 mg KOH/g and the bituminous emulsion does not contain aggregate and other mineral materials. The method for forming a bitumen emulsion includes the following steps: forming a base bitumen emulsion containing a base bitumen component and water; forming an emulsion of oxidized polyethylene separately from the base bitumen emulsion, where the emulsion of oxidized polyethylene contains oxidized high-density polyethylene and water, and the oxidized high-density polyethylene has an acidity index of about 5 to about 50 mg KOH/g; and combining the base bitumen emulsion and the emulsion of oxidized polyethylene to form the above bituminous emulsion. The composite pavement structure contains an underlying aggregate-containing asphalt layer and an emulsion-based asphalt layer located directly on and on top of the underlying aggregate-containing asphalt layer, the emulsion-based asphalt layer being formed from the above bituminous emulsion, while the emulsion-based asphalt layer after deposition does not contain aggregate and other mineral materials, and optionally an overlying aggregate-containing asphalt layer located directly on the emulsion-based asphalt layer, moreover, the overlying aggregate-containing layer of asphalt, if present, is located on the opposite side of the asphalt layer based on the emulsion in relation to the underlying aggregate-containing layer of asphalt.

EFFECT: improved physical properties.

11 cl, 4 tbl, 1 dwg