Evaluation of the compaction characteristics of unbound material using the superpave gyratory compactor

Nicholas Lambert, Kyle Denny, Beena Sukumaran, Yusuf Mehta

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Scopus citations

    Abstract

    During previous full scale tests at the National Airport Pavement Facility (NAPTF) at Atlantic City, - USA, significant consolidation of the subbase layer occurred during aircraft trafficking accompanied by shear flow failure in the underlying low strength subgrade material. In order to understand the compaction and shear flow characteristics of the subbase layer during construction and trafficking, the material was compacted in the Superpave Gyratory Compactor (SGC) at various stress levels and at different moisture contents. Since the SGC is primarily used for compaction of asphalt concrete, the compaction characteristics in the Superpave Gyratory Test were calibrated to field compaction of the subbase material during construction at similar moisture contents. The field data collected included the change in density of the subbase layer during compaction with number of passes of the roller. The calibration was done by comparing the shape of the curve. The calibration provided the benchmark values for laboratory evaluation of unbound material in SGC, such as stress level and the gyratory angle of testing. The shape of the compaction curve and the density at various gyrations levels provided an insight into the understanding of the compaction characteristics of the subbase material under roller compaction. This paper provides the airport pavement designers the efficacy of using the SGC as a means of evaluating the performance of unbound material during compaction.

    Original languageEnglish (US)
    Title of host publicationAsphalt Material Characterization, Accelerated Testing, and Highway Management
    Pages65-71
    Number of pages7
    Edition190
    DOIs
    StatePublished - Dec 1 2009
    Event2009 GeoHunan International Conference - Asphalt Material Characterization, Accelerated Testing, and Highway Management - Changsha, Hunan, China
    Duration: Aug 3 2009Aug 6 2009

    Publication series

    NameGeotechnical Special Publication
    Number190
    ISSN (Print)0895-0563

    Other

    Other2009 GeoHunan International Conference - Asphalt Material Characterization, Accelerated Testing, and Highway Management
    Country/TerritoryChina
    CityChangsha, Hunan
    Period8/3/098/6/09

    All Science Journal Classification (ASJC) codes

    • Civil and Structural Engineering
    • Architecture
    • Building and Construction
    • Geotechnical Engineering and Engineering Geology

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