Civil Engineering Reference
In-Depth Information
T ABLE 9.13
Asphalt Institute Criteria for Marshall Mix Design (The Asphalt Institute,
1995)
Traffic Level
Light
Medium
Heavy
Compaction
35
50
75
(blows)
Minimum
Maximum
Minimum
Maximum
Minimum
Maximum
Stability, kN
3.34
—
5.34
—
8.01
—
Flow, 0.25 mm
8
18
8
16
8
14
Air Voids, %
3
5
3
5
3
5
VMA, %
Use the criteria in Table 9.14
VFA, %
70
80
65
78
65
75
T ABLE 9.14
Minimum Percent Voids in Min-
eral Aggregate (VMA) (The Asphalt Institute, 1995)
Minimum VMA, Percent
Design Air Voids
2
Nominal Maximum
Particle Size
1
3.0
4.0
5.0
2.36 mm (No. 8)
19.0
20.0
21.0
4.75 mm (No. 4)
16.0
17.0
18.0
9.5 mm (3/8 in.)
14.0
15.0
16.0
12.5 mm (1/2 in.)
13.0
14.0
15.0
19.0 mm (3/4 in.)
12.0
13.0
14.0
25.0 mm (1.0 in.)
11.0
12.0
13.0
1
The nominal maximum particle size is one size larger
than the first sieve to retain more than 10 percent.
2
Interpolate minimum VMA for design air void values
between those listed.
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