(Received 25 July 2014; accepted 8 April 2015)
Published Online: 15 July 2015
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Laboratory Proctor and vibratory table compaction tests are commonly used to determine moisture-density-compaction energy relationships for soils and are typically limited to one or two compaction energy curves. They do not, however, provide shear strength or stiffness parameters that are commonly used in design and with performance-based specifications. In this study, a gyratory compactor equipped with a pressure distribution analyzer (PDA) was used to rapidly develop moisture-density-shear resistance-compaction energy relationships. Because the PDA equipment involves sensors, data acquisition, and interpretation, repeatability and reproducibility tests were conducted and evaluated using two-way analysis of variance. A wide range of geomaterials was tested: silica sand, crushed limestone sub-base, recycled pavement materials sub-base, and coal combustion products. Comparisons between the gyratory PDA test and conventional laboratory compaction tests and factors affecting the moisture-density-strength-energy relationships were discussed.
Ph.D. Student, Iowa State Univ., Ames, IA
White, David J.
R.L. Handy Professor of Civil Engineering, Iowa State Univ., Ames, IA
Research Assistant Professor, Iowa State Univ., Ames, IA
Stock #: GTJ20140159