THE ROLE OF NANOMODIFIER IN IMPROVING THE TIRE TRACK RESISTANCE OF ASPHALT CONCRETE

Abstract

Aspects related to plastic tire tracks, whose performance directly depends on the properties of the adhesive contained in the asphalt concrete, have been considered. The influence of carbon nanomaterials on the quality parameters of the polymer-bitumen adhesive was compared with the bitumen composition obtained by applying the thermo-elastoplastic EVA polymer containing ethylene and vinylacetate copolymer and compared with the bitumen composition used in production. The physical meaning of the empirical coefficient of the mathematical model describing the formation of the tire track is determined. In accordance with the conducted research, for the assessment of the service life of the pavement, a reporting method was used that complies with the requirements of the standard (EC EN 12697-22) for the determination of residual deformations accumulated in the road surface under the influence of traffic loads. The determination of the calculated service life was made according to the criterion of resistance to plastic deformation. Studies have shown that adding multi-walled carbon nanotubes to the polymer-bitumen adhesive increases the calculated service life of the road surface (according to plastic deformation criteria) by up to 75%. At the same time, when using carbon nanomodifier, it is possible to reduce the amount of high-cost polymer added to bitumen up to 29%.