Table 2.
Aggregate Gradations
Gradation 1
Gradation 2
Gradation 3
Percent Passing
Percent Passing
Percent Passing
Sieve Size, mm
by Mass
by Mass
by Mass
0.30
9-25
11-27
11-27
0.15
6-18
6-18
6-18
0.075
3-6
3-6
3-6
Table 2.
Aggregate Gradations
Gradation 1
Gradation 2
Gradation 3
Percent Passing
Percent Passing
Percent Passing
Sieve Size, inch
by Mass
by Mass
by Mass
1
100
---
---
3/4
76-96
100
---
1/2
68-88
76-96
100
3/8
60-82
69-89
76-96
No. 4
45-67
53-73
58-78
No. 8
32-54
38-60
40-60
No. 16
22-44
26-48
28-48
No. 30
15-35
18-38
18-38
No. 50
9-25
11-27
11-27
No. 100
6-18
6-18
6-18
No. 200
3-6
3-6
3-6
2.2
ASPHALT CEMENT BINDER
**************************************************************************
NOTE: Performance Graded (PG) asphalt binders
should be specified wherever available. The same
grade PG binder used by the state highway department
in the area should be considered as the base grade
for the project (e.g. the grade typically specified
in that specific location for dense graded mixes on
highways with design ESALS less than 10 million).
The exception would be that grades with a low
temperature higher than PG XX-22 should not be used
(e.g. PG XX-16 or PG XX-10), unless the Engineer has
had successful experience with them.
Typically, rutting is not a problem on airport
runways. However, at airports with a history of
stacking on end of runways and taxiway areas,
rutting has accrued due to the slow speed of loading
on the pavement. If there has been rutting on the
project or it is anticipated that stacking may
accrue during the design life of the project, then
the following grade "bumping" should be applied for
the top 125 mm (5 inches) of paving in the end of
runway and taxiway areas: for aircraft tire pressure
between 0.7 and 1.4 MPa (100 and 200 psi), increase
the high temperature one grade; for aircraft tire
pressure greater than 1.4 MPa (200 psi), increase
the high temperature two grades. For Navy projects,
SECTION 02749
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