<p><p><strong>References:<br></strong><em>Adams, et al. (2011)<br>Berg, et al. (2009)<br>Morrison, et al. (2006b)<br>Tanyu, et al. (2008)</em></p><p><strong>Method Summary</strong></p><p>Moisture and density control is imperative for construction of MSE systems. Reinforced wall fill needs to achieve a certain standard in terms of optimum moisture content and dry density.</p><p><strong> </strong><strong>Accuracy and Precision</strong></p><p>Accuracy is reliant on the experience of the inspector.</p><p><strong>Adequacy of Coverage</strong></p><p>Compaction control testing of the reinforced backfill should be performed on a regular basis during the entire construction project. A minimum frequency of one test within the reinforced soil zone per lift for every150 feet (45 m) of wall is recommended<strong>.</strong></p><p><strong>Implementation Requirements</strong></p><p>With the exception of the 3-foot (1-m) zone directly behind the facing elements or slope face, large, smooth-drum, vibratory rollers should be used to obtain the desired compaction. Sheepsfoot and grid type rollers should not be permitted because of possible damage to the reinforcements.</p><p><strong>General Comments </strong></p><p>Placement moisture content can have a significant effect on reinforcement-soil interaction. Moisture content wet of optimum makes it increasingly difficult to maintain an acceptable facing alignment, especially if the fines content is high. Moisture contents that are too dry may not achieve required density and could result in significant settlement during periods of rainfall.</p></p>