Investigation of Improved Compaction by Rubber-Tire Rollers. Final Report

摘要

The purpose of the project was to determine whether or not significant benefits can be derived from the addition of a rubber-tire roller to the compaction train. The study consisted of a review of the literature and field testing on five projects. The field testing on each project consisted of rolling a conventional section using the contractor's steel-wheel rollers and rolling a test section using a rubber-tire roller as an intermediate roller. The primary benefits found were decreased variability transversely when the rubber-tire roller was used and some improvement in joint density as measured by the nuclear gauge. While some benefits were obtained, there was not, in the author's opinion, sufficient improvement to make a rubber-tire roller a general requirement. Consideration should be given to using a rubber-tire roller when the compaction train being used does not provide sufficiently dense joints or reasonably uniform compaction.