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Open-graded porous asphalt

Published: | Category: Construction , Asphalt , Specifications | Audiences: Civil engineering laboratories, Road traffic engineers & consultants, Roading contractors

This specification and guidance notes describe the required properties of open graded porous asphalt for use as a surfacing course for road pavements. This mix type is intended to be used as a surfacing where there is a requirement for texture depth, noise reduction and /or splash and spray suppression.

The specification covers both bitumen-bound and epoxy-modified bitumen bound porous asphalt mixes.

See also:
NZTA T21 Test methods for epoxy modified open-graded porous asphalt

Publication details

  • Author:
  • Published: January 2024
  • Reference: NZTA P11
  • Contact: pavements@nzta.govt.nz
  • Conditions: This specification is mandatory for state highways and recommended for local roads.
  • Also known as: P/11

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Browse section/chapter

  1. Open-graded porous asphalt specification — 15 pages, 454 KB
  2. Open-graded porous asphalt notes — 6 pages, 259 KB
  3. Open-graded porous asphalt approved epoxy binders as of 18 January 2023 — 1 pages, 260 KB
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