Compaction
Table 3. Compaction test results--Mn/ROAD ma-
terials.
Results of the compaction tests are shown in
Optimum
Figure 3 and summarized in Table 3, along with
Maximum
water
the method used. Appendix B contains raw data
dry density
content
Method
from the tests. We used three compactive proce-
3 (Mg/m3)
Material
lb/ft
(wt %) employed
dures in the tests conducted: 1) Army method CE-
55 (MIL-STD-621A, method 100), which is simi-
Subgrade
lar to the modified AASHTO compaction test
1171 (563)
120.1 (1.92)
13.8
CE-55
1193 (564)
120.6 (1.93)
13.2
CE-55
(AASHTO T-180-74) and involves a compactive
1206 (565)
117.8 (1.89)
15.5
CE-55
effort of 55,000 ft-lb/ ft3 (2,630 kJ/m3); 2) method
1206 (565)
105.5 (1.69)
18.0
CE-12
CE-12 (MIL-STD-621A; equivalent to AASHTO
1206 (565)
102.1 (1.64)
20.4
5K
T-99-81), which provides 12,000 ft-lb/ft3(575 kJ/
1232 (566)
124.4 (1.99)
11.9
CE-55
m3) of compactive effort; and 3) a procedure pro-
viding 5,000 ft-lb/ft3 (239 kJ/m3) of compactive
Class 3
Blended
117.0 (1.87)
11.0
CE-12
effort using the same equipment used for the CE-
Stockpile
131.8 (2.11)
7.6
CE-55
55 and CE-12 methods. In all cases, a mechanical
Stockpile
123.7 (1.99)
11.0
CE-12
compactor with a "sector foot" was used to com-
pact the samples.
Class 6
Cole et al. (1987) did not provide compaction
Blended
132.3 (2.12)
4.1
CE-55
data for the class 4 special and class 5 special
Stockpile
130.4 (2.09)
2.1
CE-55
Stockpile
120.8 (1.93)
4.0
CE-12
subbase substitute materials.
Notes:
Frost susceptibility
CE-55 is similar to AASHTO T-180
Frost susceptibility tests were conducted using
CE-12 is similar to AASHTO T-99
5 K has a compactive effort of 5,000 ft-lb/ft3
the procedures described in Chamberlain (1987).
(239 kJ/m3)
Frost susceptibility was determined by subjecting
(Mg/m3) (lb/ft 3)
(Mg/m3) (lb/ft 3)
140
140
2.2
1193 Subgrade
1171 Subgrade
2.2
130
135
2.0
2.1
120
130
S = 100%
1.8
S = 100%
110
125
2.0
CE - 55
1.6
100
120
1.9
CE - 55
90
115
1.4
1.8
80
110
10
15
20
25
30
0
5
10
15
20
Water Content (%)
Water Content (%)
a. Subgrade sample 1171 (563).
b. Subgrade sample 1193 (564).
Figure 3. Compaction test results.
7
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