Back to Resources

Research Report 142 Materials & methods needed to prepare subgrades suitable for CAPTIF

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

The Canterbury Accelerated Pavement Testing Indoor Facility (CAPTIF) is a state-of-the-art pavement testing facility located at Christchurch, New Zealand. This report presents the results of the third stage, carried out in 1998, of a three-stage project to determine the materials and methods necessary to prepare appropriate subgrades of a desired strength to be used at CAPTIF.

A subgrade construction specification was developed using the recommendations of reports from previous stages of the project. This primariy involved controlling the water content of the subgrade to achieve different subgrade strengths. A trial pavement was constructed at CAPTIF and subjected to 147,000 load repetitions. The properties of each pavement layer were carefully monitored during construction, at intervals during the loading and at the completion of the loading sequence.

Keywords: basecourse, CAPTIF, loading, New Zealand, pavements, roads, sub-base, subgrade, trafficking

Publication details

  • Author:
  • Published: 1999
  • Reference: 142