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<p>This study investigates the viability of substituting the NDG with the dynamic cone penetrometer (DCP) for quality assurance processes in embankment and base course test procedures, specifically on lightweight aggregate (LWA). Limited studies investigate the utilization of DCP on LWA. DCP benefits consist of millimeter precision, decreased safety concerns, decreased training demands, and the absence of stringent federal regulations or licensing requirements. The DCP also moves toward a performance-based specification for acceptance versus density, a material-based specification. Specifications for accepting soil layers using the DCP have been established previously. This study is a follow-up investigation that builds upon previous research and focuses on LWA. The blend of laboratory and fieldwork was conducted on two LW fill materials. 5-lb and 17.6-lb DCPs were compared, a key finding. A 5-lb hammer for shallow depths, with a minimum blow count of six for 6-inch depths, and a minimum blow count of 16 for a 10-inch layer recommended.</p>

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Evaluation of Lightweight Aggregate with the Dynamic Cone Penetrometer

  • 期刊论文

  • 发表日期：

    2025年5月13日

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  • Gavin Gautreau,
  • Nicholas Ferguson,
  • Masoud Nobahar

摘要

This study investigates the viability of substituting the NDG with the dynamic cone penetrometer (DCP) for quality assurance processes in embankment and base course test procedures, specifically on lightweight aggregate (LWA). Limited studies investigate the utilization of DCP on LWA. DCP benefits consist of millimeter precision, decreased safety concerns, decreased training demands, and the absence of stringent federal regulations or licensing requirements. The DCP also moves toward a performance-based specification for acceptance versus density, a material-based specification. Specifications for accepting soil layers using the DCP have been established previously. This study is a follow-up investigation that builds upon previous research and focuses on LWA. The blend of laboratory and fieldwork was conducted on two LW fill materials. 5-lb and 17.6-lb DCPs were compared, a key finding. A 5-lb hammer for shallow depths, with a minimum blow count of six for 6-inch depths, and a minimum blow count of 16 for a 10-inch layer recommended.