# Dense-Graded

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.

- Canonical URL: https://pavementinteractive.org/reference-desk/pavement-types-and-history/pavement-types/dense-graded-hma/
- Last updated: 2026-11-01
- Review: reviewed by licensed professional engineers on the previous Pavement Interactive site, where reviewers were not recorded by name

A dense-graded mix is a [well-graded](https://pavementinteractive.org/reference-desk/materials/aggregate/gradation-and-size/) 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](https://pavementinteractive.org/reference-desk/materials/aggregate/gradation-and-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](https://pavementinteractive.org/reference-desk/design/structural-design/), [friction](https://pavementinteractive.org/reference-desk/pavement-management/pavement-evaluation/skid-resistance/), leveling and [patching](https://pavementinteractive.org/reference-desk/maintenance-and-rehabilitation/maintenance/hma-patching/) needs.

## Materials

Well-graded aggregate, [asphalt binder](https://pavementinteractive.org/glossary/asphalt-binder/) (with or without modifiers), RAP

## Mix Design

[Superpave](https://pavementinteractive.org/reference-desk/design/mix-design/superpave-gradation-requirements/), Marshall or Hveem procedures.

## Other Information

Particulars about dense-graded HMA are covered by [flexible pavement](https://pavementinteractive.org/glossary/flexible-pavement/) sections in the rest of this *Guide*.

**Table 1.**

| Mixture Nominal Maximum Aggregate Size | Coarse-Graded Mix | Fine-Graded Mix |
| --- | --- | --- |
| 37.5 mm (1.5 inches) | less than 35% passing the 4.75 mm (No. 4 Sieve) | > 35% passing the 4.75 mm (No. 4 Sieve) |
| 25.0 mm (1.0 inch) | less than 40% passing the 4.75 mm (No. 4 Sieve) | > 40% passing the 4.75 mm (No. 4 Sieve) |
| 19.0 mm (0.75 inches) | less than 35% passing the 2.36 mm (No. 8 Sieve) | > 35% passing the 2.36 mm (No. 8 Sieve) |
| 12.5 mm (0.5 inches) | less than 40% passing the 2.36 mm (No. 8 Sieve) | 40% passing the 2.36 mm (No. 8 Sieve) |
| 9.5 mm (0.375 inches) | less than 45% passing the 2.36 mm (No. 8 Sieve) | > 45% passing the 2.36 mm (No. 8 Sieve) |