Tension (kPa)
Tension (kPa)
0
40
20
1 0
40
20
101
10
Sample 1206
Taxiway A Subbase
γ d = 1.690 Mg/m3
γ d = 2.16 Mg/m 3
0
10
2
G s = 2.70
G s = 2.79
10
Calculated
Calculated
1
Extraction
Extraction
10
Absorption
3
10
2
10
4
10
3
10
5
4
10
10
5
6
10
10
0
100
200
300
400
500
0
100
200
300
400
500
Tension (cm water)
Tension (cm water)
a. Subgrade sample 1206.
d. Taxiway A subbase.
Tension (kPa)
Tension (kPa)
0
40
20
2 0
40
20
101
10
Sample 1232
Dense-graded Stone
γ d = 1.89 Mg/m 3
γ d = 1.837 Mg/m3
0
10
G s = 2.80
Gs = 2.71
3
Calculated
Calculated
10
1
Extraction
Extraction
10
Absorption
102
4
10
3
10
5
10
104
5
10
6
10
0
100
200
300
400
500
0
100
200
300
400
500
Tension (cm water)
Tension (cm water)
b. Subgrade sample 1232.
e. Dense-graded stone.
Tension (kPa)
Tension (kPa)
1 0
40
0
40
20
20
10 1
10
Class 6 Blended
Class 3 Stockpile
γd = 1.839 Mg/m3
γ d = 2.029 Mg/m3
0
0
10
10
Gs = 2.79
G s = 2.69
Calculated
Calculated
Extraction
Extraction
1
1
10
10
Absorption
102
10 2
3
3
10
10
104
10 4
5
5
10
10
0
100
200
300
400
500
0
100
200
300
400
500
Tension (cm water)
Tension (cm water)
c. Class 3 stockpile.
f. Class 6 blended.
Figure 12. Tension vs. hydraulic conductivity curves. Solid line represents Gardner's equation approxi-
mation of the extraction data.
15
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