Application of Superpave Gyratory Compactor for Laboratory Compaction of Unbound Granular Materials Conference Paper uri icon

abstract

  • © 2018 American Society of Civil Engineers. Impact hammer compaction has been the most prevalent laboratory method for compaction of granular materials. Factors such as high variability of strength test results and presence of layer interface barrier between lifts can be limiting factors in this compaction technique. This paper studies the potential benefits and effects of using Superpave gyratory compactor on the engineering properties of the unbound base materials. An experimental program was conducted to compare the impact hammer and Superpave gyratory compaction. Unconfined strength tests along with the permanent deformation tests were conducted on the specimens prepared with both the impact hammer and gyratory compactor. Moisture-dry density curves were also obtained for both compaction methods. Results were compared between the specimens made with these two compaction methods using statistical analyses. Results indicate that samples compacted with the gyratory compactor show higher precision in the strength test than the impact hammer. Data show that gyratory compaction results in different engineering properties than those obtained from the impact hammer compaction. Gyratory compaction is a different mechanism of compaction from the impact hammer compaction.

author list (cited authors)

  • Arabali, P., Lee, S. I., Sebesta, S., Sakhaeifar, M. S., & Lytton, R. L.

publication date

  • January 1, 2018 11:11 AM