<p><p><strong>Reference(s):</strong></p><p><em>Holtz et al. (2008)</em></p><p><strong>Method Summary</strong></p><p>Moisture and density testing of the fill materials should be completed as the fill is placed. Laboratory testing should include the determination of the optimum moisture content and maximum dry density of the material, which provides the benchmark for comparison of field moisture and densities. A laboratory study should be performed to determine the shear strength properties of the fill materials at the field placed moistures and densities. Shear strength of foundation soils can also be monitored during construction to confirm strength gains over time.</p><p><strong>Accuracy and Precision</strong></p><p>The process of moisture and density testing for controlled fills is a well-established procedure and is considered to provide a measure of the quality of the placed materials.</p><p><strong>Adequacy of Coverage</strong></p><p>State transportation departments typically specify the frequency of testing.</p><p><strong>Implementation Requirements </strong></p><p>This QC/QA method is well established and trained DOT personnel are capable of performing the tests.</p><p><strong>General Comments</strong></p><p>The method of moisture and density testing for controlled fills is a well-established procedure for embankment construction. Using vane shear or cone penetration tests to measure foundation soil strength before, during, and after construction is also well established.</p></p>