Superpave mix design specifies aggregate gradation control points through which aggregate gradations must pass. These control points are very general and are a starting point for a job mix formula.
These tables (data taken from AASHTO MP 2, Standard Specification for Superpave Volumetric Mix Design) show typical Superpave aggregate specifications for 37.5 mm (1.5 inch) down to 9.5 mm (0.375 inch) nominal aggregate sizes. Significant figures are the same as those in AASHTO MP 2.
Table 1. 37.5 mm (1.5 inch) Nominal Size
Sieve Size | Restricted Zone | Control Points | |||
---|---|---|---|---|---|
(mm) | (U.S.) | Lower | Upper | Lower | Upper |
50 | 2 inch | 100 | – | – | – |
37.5 | 1.5 inch | 90 | 100 | – | – |
25 | 1 inch | – | 90 | – | – |
19 | 3/4 inch | – | – | – | – |
12.5 | 1/2 inch | – | – | – | – |
9.5 | 3/8 inch | – | – | – | – |
4.75 | No. 4 | – | – | 34.7 | 34.7 |
2.36 | No. 8 | 15 | 41 | 23.3 | 27.3 |
1.18 | No. 16 | – | – | 15.5 | 21.5 |
0.60 | No. 30 | – | – | 11.7 | 15.7 |
0.30 | No. 50 | – | – | 10.0 | 10.0 |
0.15 | No. 100 | – | – | – | – |
0.075 | No. 200 | 0 | 6 | – | – |
Table 2. 25 mm (1 inch) Nominal Size
Sieve Size | Restricted Zone | Control Points | |||
---|---|---|---|---|---|
(mm) | (U.S.) | Lower | Upper | Lower | Upper |
37.5 | 1.5 inch | 100 | – | – | – |
25 | 1 inch | 90 | 100 | – | – |
19 | 3/4 inch | – | 90 | – | – |
12.5 | 1/2 inch | – | – | – | – |
9.5 | 3/8 inch | – | – | – | – |
4.75 | No. 4 | – | – | 39.5 | 39.5 |
2.36 | No. 8 | 19 | 45 | 26.8 | 30.8 |
1.18 | No. 16 | – | – | 18.1 | 24.1 |
0.60 | No. 30 | – | – | 13.6 | 17.6 |
0.30 | No. 50 | – | – | 11.4 | 11.4 |
0.15 | No. 100 | – | – | – | – |
0.075 | No. 200 | 1 | 7 | – | – |
Table 3. 19 mm (3/4 inch) Nominal Size
Sieve Size | Restricted Zone | Control Points | |||
---|---|---|---|---|---|
(mm) | (U.S.) | Lower | Upper | Lower | Upper |
25 | 1 inch | 100 | – | – | – |
19 | 3/4 inch | 90 | 100 | – | – |
12.5 | 1/2 inch | – | 90 | – | – |
9.5 | 3/8 inch | – | – | – | – |
4.75 | No. 4 | – | – | – | – |
2.36 | No. 8 | 23 | 49 | 34.6 | 34.6 |
1.18 | No. 16 | – | – | 22.3 | 28.3 |
0.60 | No. 30 | – | – | 16.7 | 20.7 |
0.30 | No. 50 | – | – | 13.7 | 13.7 |
0.15 | No. 100 | – | – | – | – |
0.075 | No. 200 | 2 | 8 | – | – |
Table 4. 12.5 mm (1/2 inch) Nominal Size
Sieve Size | Restricted Zone | Control Points | |||
---|---|---|---|---|---|
(mm) | (U.S.) | Lower | Upper | Lower | Upper |
19 | 3/4 inch | 100 | – | – | – |
12.5 | 1/2 inch | 90 | 100 | – | – |
9.5 | 3/8 inch | – | 90 | – | – |
4.75 | No. 4 | – | – | – | – |
2.36 | No. 8 | 28 | 58 | 39.1 | 39.1 |
1.18 | No. 16 | – | – | 25.6 | 31.6 |
0.60 | No. 30 | – | – | 19.1 | 23.1 |
0.30 | No. 50 | – | – | 15.5 | 15.5 |
0.15 | No. 100 | – | – | – | – |
0.075 | No. 200 | 2 | 10 | – | – |
Table 5. 9.5 mm (3/8 inch) Nominal Size
Sieve Size | Restricted Zone | Control Points | |||
---|---|---|---|---|---|
(mm) | (U.S.) | Lower | Upper | Lower | Upper |
12.5 | 1/2 inch | 100 | – | – | |
9.5 | 3/8 inch | 90 | 100 | – | – |
4.75 | No. 4 | – | 90 | – | – |
2.36 | No. 8 | 32 | 67 | 47.2 | 47.2 |
1.18 | No. 16 | – | – | 31.6 | 37.6 |
0.60 | No. 30 | – | – | 23.5 | 27.5 |
0.30 | No. 50 | – | – | 18.7 | 18.7 |
0.15 | No. 100 | – | – | – | – |
0.075 | No. 200 | 2 | 10 | – | – |