Laboratory test mainly compaction test of maximum dry density and optimum water content. Many factors affect the maximum dry density, such as soil type, grain size, water content, compaction, etc. Here change the number of compaction methods of increase of compaction work. As the change of compaction work, changes in the maximum dry density and optimum water content of soil. In order to make test universal has selected three pilot field study, respectively, in each test sample, tested indicators of soil physical properties, the results as shown in table 3-5:
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