TRB’s National Cooperative Highway Research Program (NCHRP) Web Document 66: An Investigation of the Cause of Variation in Hot-Mix Asphalt (HMA) Bulk Specific Gravity Test Results Using Non-Absorptive Aggregates investigates the cause of variation in relative density from the bulk test results.
National Academies of Sciences, Engineering, and Medicine. 2004. An Investigation of the Cause of Variation in HMA Bulk Specific Gravity Test Results Using Non-Absorptive Aggregates. Washington, DC: The National Academies Press. https://doi.org/10.17226/22064.
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