The Study of Bitumen with Stabilizing Additives for SMA by Infrared Spectroscopy Method

Increasing the volume of macadam-mastic asphalt concrete used in the upper layers of road surfaces requires the development of effective stabilizing additives that ensure the uniformity of the asphalt mix during short-term storage and transportation, as well as improving the properties of asphalt concrete. Such additives include the complex stabilizing additive of the following composition: 90% cellulose fibers from waste paper, 5% rubber powder, 5% viscous petroleum bitumen of the ORB 90/130 brand. This article presents the results of a study of bitumen with the additive “Viatop 66” and the complex cellulose-containing stabilizing additive (CSA). Using the method of IR-Fourier spectroscopy, graphical data were obtained, as a result of their analysis, it was found that the interaction of stabilizing additives for macadam-mastic asphalt concrete with bitumen leads to the occurrence of additional absorption bands characteristic of aromatic compounds (CH, benzene ring), sulfur-containing functional groups S = O st, R-SO-R, R-SO-OH, R-SO2-R, C = S st, as well as for groups C-O-H. X-ray spectral analysis confirmed the presence of additional sulfur-containing spectra in the composition of stabilizing additives. It was found that depending on the chemical composition of stabilizing additives, the physical and mechanical characteristics of the bituminous binder and the resulting asphalt concrete change.