triaxial cell on the loading piston was used to
clamped around the specimen. Radial deforma-
monitor the load applied to the specimen.
tion was also monitored using three noncontacting
The axial deformation was monitored using two
multi-VITs (variable impedance transducers)
LVDTs, or linear variable displacement transduc-
spaced evenly around the specimen at its mid-
ers, mounted on hinged arms. The LVDT assem-
point. These pointed at small aluminum foil tar-
blies were mounted on two circumferential rings
gets positioned on the specimen.
Table 2. Resilient modulus samples tested.
Subgrade 1206
Subgrade 1232
Dry density Water content
Dry density Water content
Mg/m3 (lb/ft3)
Mg/m3 (lb/ft3)
No.
(% by wt)
No.
(% by wt)
Never frozen
Never frozen
5K Compactive effort*
CE 55 Compactive effort
18A
1.77 (110.3)
13.7
14A
1.76 (109.8)
13.1
18B
1.72 (107.4)
15.9
14B
1.78 (111.4)
12.9
18C
1.69 (105.3)
16.1
14C
1.78 (111.4)
13.0
21B
1.70 (106.4)
19.7
15A
1.78 (111.0)
14.4
21C
1.70 (106.1)
17.3
15B
1.77 (110.8)
14.1
15C
1.79 (112.0)
13.8
22A
1.69 (108.4)
19.0
15D
1.77 (110.3)
14.3
22B
1.73 (108.0)
19.1
22C
1.74 (108.6)
18.3
16A
1.76 (109.9)
15.7
16B
1.75 (109.0)
15.7
CE 12 Compactive effort
16C
1.76 (110.0)
15.6
16A
1.69 (105.6)
13.5
16D
1.77 (110.7)
15.5
16B
1.67 (104.4)
14.1
16C
1.89 (118.1)
14.3
18A
1.75 (109.3)
17.5
18B
1.75 (109.5)
17.5
18A
1.69 (105.4)
17.4
18C
1.76 (109.9)
17.5
18B
1.71 (106.9)
15.9
18D
1.76 (110.0)
17.2
18C
1.72 (107.3)
15.9
S1
1.70 (106.1)
20.5
20A
1.69 (105.8)
18.5
S2
1.68 (104.7)
21.3
20C
1.70 (106.1)
17.8
S3
1.70 (106.3)
20.3
CE 55 Compactive effort
Frozen/thawed (saturated)
13A
1.74 (108.5)
11.0
CE 12 Compactive effort
13B
1.68 (105.1)
10.6
M4-1A
1.73 (107.8)
18.9
M4-1B
1.72 (107.5)
18.8
15A
1.88 (117.3)
13.9
M4-2A
1.71 (106.6)
19.3
15B
1.82 (113.9)
13.4
M4-2B
1.72 (107.6)
18.3
15C
1.85 (115.7)
13.5
M6-1A
1.69 (105.6)
18.9
17A
1.82 (113.9)
14.9
M6-1B
1.72 (107.1)
19.2
17B
1.86 (116.1)
14.9
M6-3A
1.68 (104.7)
19.4
17C
1.84 (114.9)
14.4
M6-3B
1.68 (104.7)
20.2
Frozen/thawed (saturated)
CE 12 Compactive effort
M5-1A
1.71 (106.5)
22.6
M5-1B
1.67 (104.1)
24.1
M5-2A
1.68 (104.6)
23.4
M5-2B
1.70 (106.0)
22.8
* 5K compactive effort = 5,000 ft-lb/ft3 applied in layers similar to the CE 12 and CE 55 test methods.
3
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