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Research Report 100 Pavement density

Published: | Category: Research & reports , Research programme , Performance monitoring , Activity management , Natural hazard risk management , Safety, security and public health , Environmental impacts of land transport , Transport demand management , Integrated land use and transport systems , Sustainable land transport , About the research programme , Economic development | 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

A PDF scan of this NZ Transport Agency research report is available from