Evaluation of the Use of Rubber-Tire Rollers on Asphalt Concrete

摘要

The addition of a rubber-tire roller was required on two projects on maintenance schedules and on two construction projects in 1988. The rubber-tire roller was used as an addition to the conventional rollers on one-half of each project. The rubber-tire roller was required to have a minimum of 80 psi ground contact pressure (GCP). On two of the projects, the addition of the rubber-tire roller improved the pavement properties compared to those on the conventionally rolled section. On one project, the conventionally rolled section had better pavement properties, and on one project there was no difference. The results of the study and one conducted in 1987 indicate that the addition of a rubber-tire roller improved the pavement properties on more than half of the projects tested. Based on the rate of improvement, it is recommended that a rubber-tire roller operating in the intermediate roller position with a minimum GCP of 80 psi and applying three passes be required on all modified mixes.