FIELD: chemistry.
SUBSTANCE: invention relates to modified non-volatile binder for cold asphalt and regenerated non-volatile cold asphalt mixture, in which it is used. Non-volatile modified bitumen binder for cold mixtures used for road pavement or road repair, containing: A) 0.1–30 wt % of at least one petroleum bitumen selected from residual bitumen and oxidised bitumen, B) 0.1–30 wt % of at least one natural bitumen selected from gilsonite, shiny resin and grahamite, C) 0.1–15 wt % RMC-polymer modifier, which is a vinyl aromatic hydrocarbon and conjugated diene block copolymer, comprising at least one of styrene-butadiene block-copolymer (SBS), styrene-isoprene block copolymer (SIS) and styrene-ethylene-butylene block-copolymer (SEBS), D) 20–50 wt % of at least one process oil selected from paraffin oil, naphthene oil, aromatic oil, natural oil and mineral oil, and E) 0.5–30 wt % of at least one adhesion promoter selected from rosin esters, modified acrylics, modified silicones, polyvinyl ethers and silicone resins, non-volatile modified bitumen binder for cold mixtures is obtained by means of steps: a) heating oil bitumen A), and natural bitumen B) to 160–170 °C, b) adding an RMC-polymer modifier to heated oil bitumen and natural bitumen and mixing in a batch mixing plant at temperature of 170–180 °C for three or more hours to obtain modified bitumen, addition of adhesion promoter E) to modified bitumen and stirring at temperature 170–180 °C for one hour or more, d) adding process oil D) to the modified bitumen obtained from the step c) containing the adhesion promoter, and stirring at temperature of 170–180 °C for one hour or more, and e) cooling mixture after step d). Non-volatile cold regenerated asphalt mixture for road pavement or road repair, comprising: 1–3 wt % non-volatile modified bitumen binder for cold mixtures, 93–97 wt % of regenerated aggregate and, 4 wt % of filler, wherein non-volatile modified bitumen binder for cold mixtures has said composition.
EFFECT: technical result is improved physical properties, long-term storage and stability and possibility of use in rainy weather or in winter.
4 cl, 3 tbl, 4 ex
