VITRIFICATION AND VISCOELASTIC PROPERTIES OF BITUMENS
Because of differences in the molecular weight distribution in bitumen and their intermolecular interaction, which cause the formation of various disperse structures at temperatures equally remote from the glass transition temperature Tc, it was not possible to describe the viscoelastic properties of bitumens with the help of the WLF equation. The corrections to the equation of the WLF allowing to equalize the parameters of the bitumen structure at temperatures equally remote from Tc are proposed, which allowed us to apply Tc and the WLF equation to describe the properties of bitumens. The solution of this problem was found on the basis of the determination of the tem- peratures of reduction of T0 bitumens by the grapho-analytical method of establishing the general relationship between Tc, T0 and the parameters of the bitumen structure and modifying the WLF equation.