Improved Surface Texture Using Single-Roller Compaction

摘要

The asphalt compaction process is one of the most important factors affecting pavement performance. The current compaction procedure for Canadian highways is performed in three stages (breakdown, intermediate, and finish) that are completed using three different rollers: vibratory, pneumatic tire, and static. The compaction of bridge deck asphalt overlay requires an additional set of lighter weight pneumatic and static rollers due to contract restrictions. Thus, the current compaction method requires several sets of rollers, which increases construction costs. Other deficiencies of the current compaction method include a design weakness in the rollers that results in check cracks, lower compaction at unsupported edges and longitudinal joints, and loss of fine aggregates, all of which affect the pavement texture and shorten the lifespan of the asphalt mat. In response, an innovative single-roller compaction method with a prototype roller, known as the Asphalt Multi Integrated Roller (AMIR), was tested in Ontario. This paper examines and compares the performance of three field trials compacted with conventional rollers and the AMIR after three years of traffic use. The results confirm that the AMIR is capable of providing single stage compaction that does not induce check cracks and improves compaction at joints and unsupported edges.