Laboratory compaction test results on a clayey soil are listed in the table. Moisture content (%) Dry
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Question:
Laboratory compaction test results on a clayey soil are listed in the table.
Moisture content (%) | Dry unit weight (kN/m3) |
6 | 14.80 |
8 | 17.45 |
9 | 18.52 |
11 | 18.9 |
12 | 18.5 |
14 | 16.9 |
Following are the results of a field unit weight determination test on the same soil with the sand cone method:
• Calibrated dry density of Ottawa sand = 1570 kg/m3
• Calibrated mass of Ottawa sand to fill the cone = 0.545 kg
• Mass of jar + cone + sand (before use) = 7.59 k
• Mass of jar + cone + sand (after use) = 4.78 kg
• Mass of moist soil from hole = 3.007 kg
• Moisture content of moist soil = 10.2%
Determine
a. Dry unit weight of compaction in the field
b. Relative compaction in the field
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