A dense-graded mix is a well-graded HMA mixture intended for general use. When properly designed and constructed, a dense-graded mix is relatively impermeable. Dense-graded mixes are generally referred to by their nominal maximum aggregate size. They can further be classified as either fine-graded or coarse-graded. Fine-graded mixes have more fine and sand sized particles than coarse-graded mixes (see Table 1 for definitions of fine- and coarse-graded mixes).
Purpose
Dense-graded mixes are suitable for all pavement layers and for all traffic conditions. They work well for structural, friction, leveling and patching needs.
Materials
Well-graded aggregate, asphalt binder (with or without modifiers), RAP
Mix Design
Superpave, Marshall or Hveem procedures.
Other Information
Particulars about dense-graded HMA are covered by flexible pavement sections in the rest of this Guide.
| Mixture Nominal Maximum Aggregate Size | Coarse-Graded Mix | Fine-Graded Mix |
| 37.5 mm (1.5 inches) | < 35 % passing the 4.75 mm (No. 4 Sieve) | > 35 % passing the 4.75 mm (No. 4 Sieve) |
| 25.0 mm (1.0 inch) | < 40 % passing the 4.75 mm (No. 4 Sieve) | > 40 % passing the 4.75 mm (No. 4 Sieve) |
| 19.0 mm (0.75 inches) | < 35 % passing the 2.36 mm (No. 8 Sieve) | > 35 % passing the 2.36 mm (No. 8 Sieve) |
| 12.5 mm (0.5 inches) | < 40 % passing the 2.36 mm (No. 8 Sieve) | 40 % passing the 2.36 mm (No. 8 Sieve) |
| 9.5 mm (0.375 inches) | < 45 % passing the 2.36 mm (No. 8 Sieve) | > 45 % passing the 2.36 mm (No. 8 Sieve) |
