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Cover of Proficiency Exercise: Resilient Modulus
Proficiency Exercise: Resilient Modulus
  • Publication no: AP-T57-06
  • ISBN: 1 921139 54 4
  • Published: 30 August 2006
An inter-laboratory proficiency study was conducted based on the resilient modulus test. Participants from Australia and New Zealand were required to test nine asphalt cylinders prepared by a single laboratory. All participants used a MATTA to determine the resilient modulus but a number of versions of the device were encountered within the study. The variability in resilient modulus between laboratories was estimated to be around 40 percent of gross mean value. This large variability is unacceptable and further work will be required to investigate contributing factors.
  • AP-T57/06 Proficiency Exercise: Resilient Modulus
  • SUMMARY
  • CONTENTS
  • TABLES
  • FIGURES
  • 1. INTRODUCTION
    • 1.1. General
    • 1.2. Testing apparatus
  • 2. OBJECTIVES
  • 3. METHOD
    • 3.1. Samples
    • 3.2. Instructions
    • 3.3. Analysis
  • 4. RESULTS
    • 4.1. Conformance with test method
    • 4.2. Checking trends within a test
    • 4.3. Review of the results
      • 4.3.1. Individual cylinders
      • 4.3.2. Mean of triplicates
      • 4.3.3. Mean of triplicates – non-conforming laboratories removed
      • 4.3.4. Mean of triplicates – all non-conforming laboratories removed
      • 4.3.5. Summary
    • 4.4. Open versus closed loop MATTAs
  • 5. CONCLUSIONS
  • REFERENCES
  • APPENDIX A PARTICIPANTS
  • APPENDIX B MIX DESCRIPTIONS
  • APPENDIX C INSTRUCTIONS TO PARTICIPANTS
  • APPENDIX D DATA
  • INFORMATION RETRIEVAL