Table 8-1.4
Typical Properties of Compacted Soils
Group
Soil
Range of
Range of
Typical
Typical Strength Characteristics
Typical
Range
Range of
Symbol
Type
Maximum
Optimum
Value of
Coefficient
of
Subgrade
Dry Unit
Moisture,
Compression
of
CBR
Modulus
Weight,
Percent
Permeability
Values
k
At
At
Cohesion
Effective
Cohesion
Tan
gm/cm3
gm/cm3
cm/min
134
(Saturated)
345
Stress
(as
(lbs/ft3)
(lbs/ft3)
(ft/min)
kPa
kPa
kPa
Envelope
Compacted)
(lb/ft2 )
(1.4
(3.6
Deg
kPa
(lb/ft2 )
tsf)
tsf)
9 x 10-2
GW
Well
40
8,300
2.002
11 8
0.3
0.6
0
0
>38
>0.79
graded,
2.162
80
13,800
(3 x 10-2)
clean
(125
gravel
(300
135)
sand
500)
mixtures
GF
Poorly
30
6,900
1.842
14 11
0.4
0.9
0
0
>37
>0.74
3.0
graded,
60
11,100
2.002
(10-1)
clean
(250
(115
gravel
125)
400)
sand
mixtures
3 x 10-4
GM
Silty
20
2,800
1.922
12 8
0.5
1.1
---
---
>34
>0.67
gravels,
60
11,100
2.162
(>10-5)
poorly
(100
(120
graded
400)
135)
gravel-
sand-silt
3 x 10-6
GC
Clayey
20
2,800
1.842
14 9
0.7
1.6
---
---
>31
>0.60
gravels,
40
8,300
2.082
(>10-7)
poorly
(100
(115
graded
300)
130)
gravel-
sand-silt
Previous Page
