Environmental Engineering Reference
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117
S = 100%
3
112
2
101
1
14 16
22
Water content ( w %)
3. Mod. AASHO 56 blows,10-lb hammer,
18-in drop, five layers
2. Mod. AASHO
25 blows,10-lb hammer,
18-in drop, five layers
FIGURE 3.7
Effect of different compactive energies on a
silty clay. (After paper presented at Annual
ASCE Meeting, January 1950.)
1. Std. AASHO
25 blows,5 1/2-lb hammer,
12-in drop, three layers
(All in 6-in molds)
80
80
40
35
90
90
30
25
100
100
L -105
D R -40%
N -111
20
110
110
15
120
120
D -122
130
130
10
140
140
5
FIGURE 3.8
Relative density diagram. (From Burmister,
D. M., ASTM, Vol. 48, Philadelphia, PA,
1948. Copyright ASTM International.
Reprinted with permission.)
150
0102030405060 7080 90100
150
Medium
Compact
Loose
Compact V. C .
 
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