METHOD FOR DETERMINING PROPERTIES OF ASPHALT CONCRETE MIXTURE COMPACTED BY VIBRATORY ROLLER

Abstract

The paper investigates the process of force interaction of a vibrating roller with a layer of asphalt concrete mixture. To describe the stress-strain state of the compacted layer during the interaction of the latter with a vibration roller, the Kelvin body was used. On the basis of the law of behavior of the Kelvin body, a simulation model has been developed, the result of which is a phase trajectory in the coordinates “force–displacement” for the system “drum–asphalt concrete mixture”. An analytical study of the characteristic points of the phase trajectory was carried out, as a result of which the relationship between the properties of the asphalt concrete mixture and the force effect in the area of contact of the roller with the compacted layer was established. In addition, a condition was obtained for continuous rolling of the asphalt-concrete layer with a vibrating roller, the observance of which makes it possible to increase the resource of the roller by reducing the wear of the latter. The results obtined can be used to establish the relationship between the operating modes of the vibratory roller and the properties of the compacted layer of the asphalt concrete mixture.