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Standard Proctor
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The standard Proctor is a laboratory test performed in order to
determine the maximum dry density and optimum moisture content
of a given soil. This test usually conforms to ASTM D698. Results from the
Proctor test are mostly used to determine the relative compaction of fill
soils by dividing the dry density of the fill soil by the maximum dry
density from the Proctor. The modified Proctor (ASTM D1557) is a
different, but similar, laboratory test used for the same thing. The
modified Proctor usually yields a higher maximum dry density of about 5%
with relation to the standard effort (Proctor).
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Typical values of maximum dry densities and optimum moisture contents, as presented by Lindeburg.
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Soil (USCS)
|
Maximum Dry Density (lb/ft3) |
Optimum Moisture Content (%) |
|
GW
|
125 - 135
|
8 - 11
|
|
GP
|
115 - 125
|
11 - 14
|
|
GM
|
120 - 135
|
8 - 12
|
|
GC
|
115 - 130
|
9 - 14
|
|
SW
|
110 - 130
|
9 - 16
|
|
SP
|
100 - 120
|
12 - 21
|
|
SM
|
110 - 125
|
11 - 16
|
|
SM-SC
|
110 - 130
|
11 - 15
|
|
SC
|
105 - 125
|
11 - 19
|
|
ML
|
95 - 120
|
12 - 24
|
|
ML-CL
|
100 - 120
|
12 - 22
|
|
CL
|
95 - 120
|
12 - 24
|
|
OL
|
80 - 100
|
21 - 33
|
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MH
|
70 - 95
|
24 - 40
|
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CH
|
75 - 105
|
19 - 36
|
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OH
|
65 - 100
|
21 - 45
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Other soil and soil related properties are listed below:
Angle of Internal Friction
Bearing Capacity Factors
Cohesion
External Friction Angle
Factor of Safety
Lateral Earth Pressure Coefficients
Modulus of Vertical Subgrade Reaction
Soil Unit Weights
Young's Modulus or modulus of elasticity
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