A series of modified Proctor tests have been performed on a soil that has a Gs of 2.68. The test results obtained are as follows. Point No. Weight of Compacted Soil + Mass of Mass of Can + Moisture Content Test Results Mass of Can + Dry Mold (lb) Can (g) Moist Soil (g) 1 8.73 22.13 207.51 2 9.07 25.26 239.69 3 9.40 19.74 253.90 4 9.46 23.36 250.93 5 9.22 20.28 301.47 Soil (g) 202.30 225.27 230.64 219.74 250.95 The weight of the empty mold was 5.06 lb. Plot the laboratory test results and the S = 80% and S = 100% curves, and then draw the modified Proctor compaction curve. Determine the maximum dry unit weight (lb/ft³) and the optimum moisture content, based on the modified Proctor test. Assuming that the field compaction curve is the same as the compaction curve obtained using the modified Proctor test, determine the range of as-compacted moisture content required in the field to obtain a relative compaction of at least (a) 90%, and (b) 95%.
A series of modified Proctor tests have been performed on a soil that has a Gs of 2.68. The test results obtained are as follows. Point No. Weight of Compacted Soil + Mass of Mass of Can + Moisture Content Test Results Mass of Can + Dry Mold (lb) Can (g) Moist Soil (g) 1 8.73 22.13 207.51 2 9.07 25.26 239.69 3 9.40 19.74 253.90 4 9.46 23.36 250.93 5 9.22 20.28 301.47 Soil (g) 202.30 225.27 230.64 219.74 250.95 The weight of the empty mold was 5.06 lb. Plot the laboratory test results and the S = 80% and S = 100% curves, and then draw the modified Proctor compaction curve. Determine the maximum dry unit weight (lb/ft³) and the optimum moisture content, based on the modified Proctor test. Assuming that the field compaction curve is the same as the compaction curve obtained using the modified Proctor test, determine the range of as-compacted moisture content required in the field to obtain a relative compaction of at least (a) 90%, and (b) 95%.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A series of modified Proctor tests have been performed on a soil that has a Gs of 2.68.
The test results obtained are as follows.
Point
No.
Weight of
Compacted Soil +
Mass of
Mass of Can +
Moisture Content Test Results
Mass of Can + Dry
Mold (lb)
Can (g)
Moist Soil (g)
1
8.73
22.13
207.51
2
9.07
25.26
239.69
3
9.40
19.74
253.90
4
9.46
23.36
250.93
5
9.22
20.28
301.47
Soil (g)
202.30
225.27
230.64
219.74
250.95
The weight of the empty mold was 5.06 lb.
Plot the laboratory test results and the S = 80% and S = 100% curves, and then
draw the modified Proctor compaction curve. Determine the maximum dry unit weight
(lb/ft³) and the optimum moisture content, based on the modified Proctor test.
Assuming that the field compaction curve is the same as the compaction curve
obtained using the modified Proctor test, determine the range of as-compacted moisture
content required in the field to obtain a relative compaction of at least (a) 90%, and (b)
95%.
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