Effect of field compaction method on fatigue life of asphalt pavements
Transportation Research Record Issue 1469 p. 43- 49
Field compaction of asphalt mixes has long been recognized as a major factor in the performance of the pavement. It was demonstrated in many field trials that steel roller compaction is responsible for construction-induced cracks and that this is because of an incompatibility between the geometry of the roller and the mat an their relative rigidities. It has been also demonstrated that a new type of flat plate compactor, the asphalt multi-integrated roller (AMIR), overcomes this problem and results in a smooth-textured mat, free of cracks. A series of fatigue tests were conducted on mixes from two field trials in which the major variables were steel roller versus AMIR compaction, direction of test loading, and type mix. The results showed that AMIR compaction, for either type of mix, resulted in approximately double the fatigue life, all other factors being constant.