SmartRock-Based Research on Gyratory Locking Point for Stone Mastic Asphalt Mixture

For gyratory compaction, the concept of locking point was initially developed to identify compactability asphalt mixes and alleviate potential aggregate crushing in mold. Most previous studies on were based specimens’ height change. Recent have indicated that cold mix mixtures could be determined by rotation angle range indicator using SmartRock. However, or change ultimately reflects a volume. Additionally, there is no clear physical mechanical connection between volume point. In this paper, stone mastic mixture (SMA 13) selected for compaction applying various temperatures. The data recorded SmartRock embedded different positions. Collected included stress, angle, acceleration. major findings are as follows: (1) specimen’s representative stress value when center, results close traditional evaluation (LP3 LP2-2-3); (2) reached plateau earlier than value; (3) acceleration not suitable characterizing interlocking process during compaction.