Pavement

Cover of Austroads Asphalt Deformation Trial: Dandenong Road
Austroads Asphalt Deformation Trial: Dandenong Road
  • Publication no: AP-T264-14
  • ISBN: 978-1-925037-61-6
  • Published: 2 April 2014

This report documents an asphalt deformation trial established over a 1200 m length of Dandenong Road in Melbourne. The trial aimed to validate the wheel tracking used in the Austroads mix design method. The trial involved the placement of seven mixes designed in accordance with the Austroads mix design method and one mix designed in accordance with the Marshall mix design method. All mixes comprised dense graded asphalt with a nominal size of 14 mm. None of the mixes have failed in the five years the trial has been in place and rutting has been less than anticipated.

At the time of writing there was insufficient difference in the field rutting to divide the mixes into good, average and poor performers. Further monitoring of the trial should help in distinguishing between mix performance and this then can be related back to the laboratory wheel tracking test values. All mixes performed adequately over the life of the trial.

  • 1. Introduction
  • 2. Objective
    • 2.1. Primary Objective
    • 2.2. Secondary Objectives
  • 3. Method
    • 3.1. Assignment of Responsibilities
    • 3.2. Visual Assessment of Potential Sites
    • 3.3. Range of Mixes
    • 3.4. Laboratory Program
    • 3.5. Monitoring of the Placement of the Trial Sections
    • 3.6. Monitoring of the Trial Sections
      • 3.6.1. Pavement Strength Evaluation
      • 3.6.2. Monitoring of Surface Characteristics
      • 3.6.3. Densification
  • 4. Establishment of the Trial Site
    • 4.1. The Site
    • 4.2. Trial Layout
    • 4.3. Trial Mixes
    • 4.4. Existing Condition
      • 4.4.1. PaSE Survey
      • 4.4.2. Rutting Profile
      • 4.4.3. Roughness
      • 4.4.4. Surface Texture
      • 4.4.5. Visual Survey
      • 4.4.6. Summary
  • 5. Placement of the Trial
    • 5.1. Construction Sequence
      • 5.1.1. Night One – 4/3/07
      • 5.1.2. Night Two – 5/3/07
      • 5.1.3. Night Three – 6/3/07
      • 5.1.4. Night Four – 17/10/07
    • 5.2. Construction Equipment
    • 5.3. Monitoring of the in situ Compaction Process
      • 5.3.1. Temperature
      • 5.3.2. Compacted Density
    • 5.4. Issues Arising During Placement
      • 5.4.1. Compaction
      • 5.4.2. Mix Temperature
      • 5.4.3. Supply Logistics
      • 5.4.4. Layer Thickness
      • 5.4.5. Joints
  • 6. Laboratory Testing
    • 6.1. Validation of the Mix Designs
      • 6.1.1. Volumetric Parameters
      • 6.1.2. Wheel Tracking Test
    • 6.2. Review of the Composition of the as-placed Mixes
    • 6.3. Workability
      • 6.3.1. Workability of the Mixes in the Laboratory
      • 6.3.2. Air Void Contents Achieved in the Laboratory
    • 6.4. Wheel Tracking Test
      • 6.4.1. Test Results from 2007
      • 6.4.2. Influence of Sample Thickness
      • 6.4.3. Test Results from 2010
  • 7. Surface Evaluation After the Trial
    • 7.1. Instrumented Vehicle Monitoring
      • 7.1.1. May 2007
      • 7.1.2. December 2007
      • 7.1.3. May 2008
      • 7.1.4. April 2009
      • 7.1.5. May 2010
      • 7.1.6. July 2012
    • 7.2. Densification
    • 7.3. Discussion
      • 7.3.1. Rutting
      • 7.3.2. International Roughness Index (IRI)
      • 7.3.3. Surface Texture
      • 7.3.4. Densification
  • 8. Comparisons Between Field and Laboratory Data
    • 8.1. Compaction
    • 8.2. Deformation
      • 8.2.1. Data
  • 9. Summary
  • References
  • Appendix A VicRoads Dense Graded Asphalt Specification
  • Appendix B Surveys of the Pre-Trial Surface
  • Appendix C Records of the Compaction Process
  • Appendix D Gradations of Mixes Placed
  • Appendix E Surface Evaluation Six Weeks After Laying – May 2007
  • Appendix F Surface Monitoring – December 2007
  • Appendix G Surface Monitoring – May 2008
  • Appendix H Surface Monitoring – April 2009
  • Appendix I Surface Monitoring – May 2010
  • Appendix J Surface Monitoring – July 2012
  • Appendix K In Situ Air Void Contents