Table 3. Stress conditions of resilient modulus tests
Table 4. Stress conditions of resilient modulus tests--
in current study.
previous study.
Confining pressure
Deviator stress
Stress ratio
Confining pressure
Deviator stress
Stress ratio
σ3 , kPa (lb/in.2)
σd , kPa (lb/in.2)
(σ1 /σ3)
σ3,, kPa (lb/in.2)
σd,, kPa (lb/in.2)
(σ1 /σ3)
a. Thawed or never-frozen specimens
a. Thawed specimens
48.3 (7)
48.3 (7.0)
2.0
6.9 (1)
3.4 (0.5)
1.5
48.3 (7)
34.5 (5.0)
1.7
13.8 (2)
6.9 (1.0)
1.5
48.3 (7)
27.6 (4.0)
1.6
27.6 (4)
13.8 (2.0)
1.5
48.3 (7)
20.7 (3.0)
1.4
48.3 (7)
24.1 (3.5)
1.5
48.3 (7)
13.8 (2.0)
1.3
69.0 (10)
34.5 (5.0)
1.5
48.3 (7)
6.9 (1.0)
1.1
6.9 (1)
6.9 (1.0)
2.0
48.3 (7)
3.4 (0.5)
1.1
13.8 (2)
13.8 (2.0)
2.0
27.6 (4)
48.3 (7.0)
2.8
27.6 (4)
27.6 (4.0)
2.0
27.6 (4)
34.5 (5.0)
2.3
48.3 (7)
48.3 (7.0)
2.0
27.6 (4)
27.6 (4.0)
2.0
69.0 (10)
69.0 (10.0)
2.0
27.6 (4)
20.7 (3.0)
1.8
6.9 (1)
10.3 (1.5)
2.5
27.6 (4)
13.8 (2.0)
1.5
13.8 (2)
20.7 (3.0)
2.5
27.6 (4)
6.9 (1.0)
1.3
27.6 (4)
41.4 (6.0)
2.5
27.6 (4)
3.4 (0.5)
1.1
48.3 (7)
72.4 (10.5)
2.5
13.8 (2)
34.5 (5.0)
3.5
69.0 (10)
103.4 (15.0)
2.5
13.8 (2)
27.6 (4.0)
3.0
b. Frozen specimens
13.8 (2)
20.7 (3.0)
2.5
69 (10)
60 (9)
13.8 (2)
13.8 (2.0)
2.0
69 (10)
138 (20)
13.8 (2)
6.9 (1.0)
1. 5
69 (10)
207 (30)
13.8 (2)
3.4 (0.5)
1.3
69 (10)
276 (40)
6.9 (1)
34.5 (5.0)
6.0
69 (10)
345 (50)
6.9 (1)
27.6 (4.0)
5.0
69 (10)
483 (70)
6.9 (1)
20.7 (3.0)
4.0
69 (10)
621 (90)
6.9 (1)
13.8 (2.0)
3.0
69 (10)
827 (120)
6.9 (1)
6.9 (1.0)
2.0
6.9 (1)
3.4 (0.5)
1.5
types for which resilient modulus data were avail-
b. Frozen specimens
able and found the two materials that most closely
69 (10)
34 (5)
fit Mn/DOT's specifications for size gradation (Fig.
69 (10)
69 (10)
3). A dense-graded stone tested at a cooperative
69 (10)
103 (15)
study in Winchendon, Massachusetts, most closely
69 (10)
138 (20)
matched the specifications of the class 5 special
69 (10)
207 (30)
material; a subbase material from taxiway A at the
69 (10)
276 (40)
Albany, New York, airport most closely matched
69 (10)
345 (50)
the class 4 special specifications (Bigl and Berg
69 (10)
483 (70)
1996a).
69 (10)
621 (90)
The methods used during the testing of these
69 (10)
690 (100)
materials were nearly identical to the methods of
Notes:
this study. Details of the testing procedures for
Thawed samples: each combination of stresses nor-
dense-graded stone are described in Cole et al.
mally used at each moisture condition.
(1986) and the procedures for Albany taxiway A
Frozen samples: each combination of stresses nor-
subbase are in Cole et al. (1987). Both materials
mally used at each of three temperatures.
were molded into 15.2-cm (6-in.)-diam. specimens
in the laboratory from bulk field samples and then
6
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