Geo HW #3

Geo HW #3 - Dan Aiello Geo. Eng. HW #3 1) How does the dry...

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Dan Aiello Geo. Eng. HW #3 1) How does the dry unit weight γd differ from the unit weight γ? Why is the proctor method of assessing soil compaction based on the dry unit weight and not the unit weight? -Dry unit weight and unit weight are similar because they represent the weight per unit volume. They differ because the dry unit weight has no water and is smaller value. -Geotechnical engineers use dry unit weight to measure compaction because the dry unit weight is a convenient proxy and is easier to measure.-Engineering
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2) The test results indicate a relative compaction of 101-103%, which made the construction manager believe the test must be incorrect. He believes it is impossible for the dry unit weight in the field to be greater than the maximum dry unit weight from the proctor compaction test. Prepare a 200-400 word memo explaining why the relative compaction in the field could indeed be greater than 100%. To: Construction Manager From: Dan Aiello Date: September 3, 2011 Re: Dry unit weight is higher in the field than from the proctor test There can be either two things that could have happened here to allow the Dry Unit Weight in the
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Geo HW #3 - Dan Aiello Geo. Eng. HW #3 1) How does the dry...

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