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The Township 31 MD
project was was on Route 9 between Bangor and Calais, and was similar to the
North Yarmouth project. Table 1 lists the thickness of each layer of
material in the test and control sections. Figure 1 gives a cross section
of the project, and figure 2 shows the layout of each section described in table
1.
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Table 1. Summary of TWP31-MD Test Section Configuration
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Section
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Tire shred type
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Thickness of layer (in.)
|
|
Tire shreds
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Borrow Cover
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Subbase course
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Pavement (travel lanes)
|
|
Control
|
----
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----
|
----
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25
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9
|
|
1
|
A
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24
|
24
|
25
|
9
|
|
2
|
A
|
24
|
48
|
25
|
9
|
|
3
|
A
|
24
|
72
|
25
|
9
|
|
4
|
B
|
24
|
48
|
25
|
9
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Figure 1. TWP31-MD field trial - cross section (Nickels, 1995)
Figure 2. Twp31-MD field trial - longitudinal section (Nickels, 1995)
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Compaction was
completed most effectively with a vibratory tamping foot and a vibratory smooth
drum roller. These two compaction methods worked equally well, but
compaction with a bulldozer wasn't as effective.
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