& Natural energy sources and carbon materials

Rsrh f th influn f lsti solvents n th properties f lymr-modified bitumen
Kemalov A.F. 1, Kemalov R.A. 2, Mohamad A.A. 1

1. Kazan Federal University, Department of high-viscosity oils and natural bitumen
2. Kazan Federal University, Department of high-viscosity oils and natural bitumen, Russian Gas Society

Abstract:

The process of modification of oxidized road bitumen with the production of polymer-bitumen binders (PBB) is studied. Various methods for preparing PBBs are considered: direct mixing with ground polymer, the use of a plasticizing solvent to distribute the polymer in the structure of bitumen. The plasticizer was selected; its effect on the main physicochemical parameters of bitumen was evaluated in accordance with GOST 33133-2014. It was revealed that when using the kerosene and gasoline fraction as a solvent in SRS with bitumen, it was not possible to obtain a homogeneous mixture. The compositions of polymer-bitumen binders based on synthetic rubber of isoprene and oxidized bitumen are obtained. It has been established that when using an oil extract as a plasticizer-solvent, it is possible to achieve the homogeneity of the SKI-bitumen system at a temperature of 150 C. With an increase in the solvent fraction, the softening temperature of the studied compositions decreases; on the contrary, with an increase in the polymer content, the softening temperature increases

Keywords: bitumn, lymr-bitumn bindr, lstiizr, isrn synthti rubbr