Influence on the Wear of the Tread of Automobile Tires of the Coupling Properties of the Road Surface

Abstract

The dependence of the relative wear of car tire treads on the coefficient of longitudinal traction of road surfaces is investigated. In the course of field tests, the relative wear was studied for the treads of passenger and truck tires. Various types of asphalt concrete coatings were used as abrasive surfaces during the field-testing study: asphalt concrete type B on BND 60/90, HMA-15 on BND 60/90 and HMA-20 on (PMB 60), as well as coatings with surface treatment of different service life. For these types of road surfaces, the dependence of the relative wear of the tread of truck and passenger tires on the coefficient of their longitudinal traction to the road has been established. It is shown that the presence of SBS-polymers in the bitumen binder makes it possible to improve the coupling properties not only due to the mechanical friction forces of the tire tread, but also due to the replacement of abrasive wear with elastic wear. It was found that truck tires are more susceptible to wear with an increase in the macro- and micro-roughness of the road surface, and their average wear is 3–3,5 times higher than the relative wear index for passenger car tires.