<p><p><strong>References:<br></strong><em>Sale et al. (1973)<br>Smith and Pazsint (1975)<br>Smith (1979)<br>Steinberg (1998)</em></p><p><strong>Method Summary</strong></p><p>The optimum moisture content and the maximum dry density of the soil can be determined using the standard (ASTM D 698, AASHTO T 99) or modified Proctor tests (ASTM D 1557, AASHTO T 180). The moisture content and density during the construction are monitored. Sand cone test and/or nuclear gauge measurement are employed to verify the moisture content and dry density. Roller compaction is continued till the defined density is achieved. Field CBR tests (ASTM D 1883, AASHTO T 193) can be conducted at the surface and the mid-depth of the fill (Sale et al. 1973, Smith and Pazsint 1975, Smith 1979, and Steinberg 1998). This method is suitable for the quality control as well as quality assurance during the construction phase.</p><p><strong>Accuracy and Precision</strong></p><p>The sand cone test is accurate and precise. Nuclear gauge measurements can be accurate and precise as well, if the device is well calibrated with the on-site soil. Field CBR test or CBR values estimated from other test methods (such as DCP test) using correlations are less accurate and precise.</p><p><strong>Adequacy of Coverage</strong></p><p>The sand cone test is slow to perform, especially in granular material; therefore, it has poor adequacy of coverage. However, nuclear gauge measurement and the field CBR test have good adequacy of coverage because of their fast testing processes.</p><p><strong>Implementation Requirements </strong></p><p>Sand cone test equipment is simple and the test is easily performed. Whenever nuclear gauge measurement is used, some experience and special equipment are necessary. The field CBR test requires special equipment.</p><p><strong>General Comments</strong></p><p>The field density and CBR tests are commonly used QC/QA methods. These tests can be used for all potential application areas of the partial encapsulation technology.</p></p>