Skip to content

Important notice

The building where our contact centre is based was evacuated last week. Our 0800 numbers are up and running again, but please be patient as we have limited support available for our contact centre staff. We’ll do our best to help you if you need to call us.  For more information read our latest media release.

Access keys for

  • h Home
  • m Menu
  • 0 Show list of access keys
  • 2 Skip to content
  • 3 Skip to top
Back to Resources

Research Report 100 Pavement density

Published: | Category: Activity management , Research programme , Research & reports | Audience: General

The 1997 Transit New Zealand Specification for the Construction of Unbound Granular Pavement Layers (TNZ B/2: 1997) specifies the minimum degree of compaction required is 95% of the maximum dry density (MDD) obtained using the vibratory hammer compaction test in NZS 4402.

This report examines the 95% MDD requirement by testing five sites just before sealing and testing the sites again after two months of trafficking. Linear regression analysis of changes in density after trafficking as a function of initial percentage of MDD indicates that basecourse compacted to 95% MDD shows little change in density after trafficking.

Keywords: Pavement density, maximum dry density, pavement

Publication details

  • Author:
  • Published: 1998
  • Reference: 100