The evaluation of in-place recycled asphalt concrete as an unbound granular base material

摘要

In-place recycling of asphalt concrete for use as an unbound granular base material was evaluatedusing comprehensive laboratory and field testing. Laboratory testing included particle size analysis, compaction,permeability, and static and repeated load triaxial tests. The triaxial tests were conducted with different sets ofgradations, stress levels, and water contents to investigate the effect of the different gradations on the performanceof pulverized material. Falling weight deflectometer test results were backcalculated to track the long-termperformance of the pavement structure. Based on the laboratory and field test results, it was found that theperformance of the pulverized material equaled or exceeded that of virgin aggregate base material.