U.S. Std. Sieve Size and No.
Hydrometer
3
4
4
10
40
200
100
Mn DOT Class 4 Spec.
80
60
40
Albany, TW A
Subbase
20
0
10
1.0
0.1
0.01
0.001
Grain Size (mm)
a. Albany taxiway A subbase/class 4
Gravel
Sand
Silt or Clay
C'rse
Fine
C'rse
Medium
Fine
special base.
100
Mn DOT Class 5 Spec.
80
60
40
Dense Graded
Stone
20
0
1.0
0.01
10
0.1
0.001
Grain Size (mm)
Gravel
b. Dense-graded stone, Winchendon/
Sand
Silt or Clay
C'rse
C'rse
Fine
Medium
Fine
class 5 special base.
Figure 2. Grain size distribution of substitute materials and specifications for equivalent Mn/ROAD
bases.
subbase, meets the specifications except for
Specific gravity
slightly exceeding the amount of fines at the no.
Table 2 includes the results of the specific grav-
200 sieve.
ity tests conducted on the Mn/DOT materials ac-
cording to ASTM D854-83. Also listed are the
Atterberg limits
results for the substitute materials from Cole et al.
Atterberg limits were performed on all the
(1986, 1987).
subgrade materials and on the fraction of the class
Organic content
3 special stockpile material that passed the no. 40
sieve (ASTM D4318-84; Table 2). Limits of the
Organic contents were conducted only on the
minus no. 40 sieve fraction of the dense-graded
subgrade materials, using ASTM D2974-87, Method
C with a maximum furnace temperature of 500C.
stone are also noted in Table 2. Cole et al. (1987)
did not conduct Atterberg limit tests on the Al-
Results are given in Table 2. No organic content
bany taxiway A subbase.
data are available for the substitute materials.
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