The following figure shows two compaction test results a. Determine the optimum

Question

The following figure shows two compaction test results a. Determine the optimum water content and maximum dry unit weight for each of the results. [5 points] b. Identify which one is a standard proctor test (relatively less compaction effort) and which one is a modified proctor test (relatively greater compaction effort). [5 points] 130 125 120 Sr = 100% 110 105 100 95 90 85 80 0% 5% 10% 15% 20% 25% 30% Moisture Content(% ) C. Through phase relationships, prove the 100% Saturation line [10 points Bonus

Explanation / Answer

B) Proctor test is the one in which the maximum dry unit weight is lesser. Hence the lower curve is of proctor test while the upper curve is of modified proctor test.

A) Proctor test ( Lower curve)

Optimum Moisture content = 15%

Maximum Dry unit weight = 115 pcf

B) Modified Proctor test ( Upper curve)

Optimum Moisture content = 13%

Maximum Dry unit weight = 124 pcf

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