TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 456: Non-Nuclear Methods for Compaction Control of Unbound Materials documents information on national and international experience with non-nuclear devices and methods for measuring compaction of unbound materials.
National Academies of Sciences, Engineering, and Medicine. 2014. Non-Nuclear Methods for Compaction Control of Unbound Materials. Washington, DC: The National Academies Press. https://doi.org/10.17226/22431.
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