Rheological properties and group chemical composition of oxidized bitumen in the presence of fibrous materials of various structures

The rheological properties of oxidized bitumen in the presence fibrous materials based on cellulose and chrysotile asbestos used as stabilizing additives production crushed stone-mastic asphalt concrete mixtures have been studied. It has established that supramolecular structure fibers characterizing interaction between macromolecules largely determines effectiveness their structuring action for bitumen. Thus, introduction fiber leads to an increase ability colloidal simultaneous occurrence elastic plastic components deformation. This is due uniform distribution dispersion medium penetration hydrocarbon into interfibrillary space rupture hydrogen bonds hydroxyl groups. Тhe strong structural chrysotile-asbestos prevents formation reinforcing mesh oils. As a result, values parameters Pk1, Pk2 Pm bitumen/chrysotile-asbestos composition are 1.5–2 times lower compared bitumen/cellulose composition. results study group structural-rheological compositions after heating at T = 163 °C indicate higher stability bitumen-cellulose processes thermal oxidative degradation formed By method thin-layer chromatography, it was found concentration oils composition, indicating weakening not related microstructure its fibers, which, according some researchers, prone selective diffusion capillaries fibrils.