U.S. Std. Sieve Size and No.
Hydrometer
3
4
4
10
40
200
100
Class 6 "Stockpile"
80
(specimen A)
Mn/DOT Specs.
60
40
20
0
10
1.0
0.1
0.01
0.001
Grain Size (mm)
g. Class 6 special stockpile,
Gravel
Sand
Silt or Clay
specimen A.
C'rse
Fine
C'rse
Medium
Fine
Figure 1 (cont'd).
Table 2. Physical properties of Mn/ROAD materials.
Organic
Classification
Specific
Atterberg limits
content
Material
ASTM
AASHTO
gravity
LL
PI
(%)
Subgrade
1171 (563)
SC, Clayey sand
A-6
2.70
30.6
10.6
1.1
1193 (564)
CL, Sandy lean clay
A-6
2.70
31.2
14.3
1.4
1206 (565)
CL, Sandy lean clay
A-6
2.70
37.0
18.5
1.5
1232 (566)
CL, Sandy lean clay
A-6
2.71
26.4
10.9
0.7
Class 3
Blended
SW, Well-graded sand
--
--
--
--
--
Stockpile
SW, Well-graded sand
A-1-b
2.69
17.0*
1.2*
--
Class 4
Albany taxiway
SM, Silty sand
A-1-b
2.73
--
--
--
A subbase†
Class 5:
Dense-graded
GW, Well-graded gravel
A-1-a
2.81
23*
3*
--
stone†
with sand
Class 6:
Blended
GW, Well-graded gravel
A-1-a
2.79
--
--
--
Stockpile
with sand
2.74
--
--
* minus no. 40 sieve fraction.
† from Cole et al. (1986, 1987)
specifications. The taxiway A subbase substi-
class 6 special blended material; however, the
tuted for the class 4 special is finer than the
gradation of the class 6 special stockpile meets
specifications at the no. 40 and no. 200 sieve
specifications.
sizes, so that its predicted behavior may not be
Grain size distribution of the materials sub-
exactly the same as the actual material. Dense-
stituted for class 4 special and class 5 special
graded stone, the substitute for class 5 special
are shown in Figure 2, along with the Mn/DOT
5
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