Influence Of Aggregates Angularity On The Locking

Road Materials and Pavement Design, 2019 https://doi.org/10.1080/14680629.2019.1588151 Influence of aggregates angularity on the locking point of asphalt mixtures Pawel Polaczyk, Xiang Shu, Hongren Gong and Baoshan Huang ∗ Department of Civil and... More

Road Materials and Pavement Design, 2019 https://doi.org/10.1080/14680629.2019.1588151 Influence of aggregates angularity on the locking point of asphalt mixtures Pawel Polaczyk, Xiang Shu, Hongren Gong and Baoshan Huang ∗ Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, TN, USA (Received 31 October 2018; accepted 24 February 2019 ) Aggregate angularity plays a critical role in the performance of asphalt mixtures. Current asphalt mix design methods do not specify compaction effort according to aggregate angularity or locking points. This study utilised two methods of compaction, gyratory (Superpave Gyra- tory Compactor) and impact (Marshall Hammer), to investigate the influence of aggregate angularity on the locking point of asphalt mixtures. For gyratory compaction, densifica- tion curves were used to determine the gyratory locking point. For impact compaction, an accelerometer was connected to the Marshall Hammer to register asphalt response, by whi Less