Pavement

Cover of Testing Plan to Examine the Effects of Multiple Axle Loads on Asphalt Fatigue Using Four-point Beam Tests
Testing Plan to Examine the Effects of Multiple Axle Loads on Asphalt Fatigue Using Four-point Beam Tests
  • Publication no: AP-T186-11
  • ISBN: 978-1-921709-86-9
  • Published: 2 August 2011

This report presents a testing plan to examine the effect that multiple axle group loads (e.g. tandem, triaxles, etc.) have on the flexural fatigue performance of asphalt, and forms a component of long term Austroads project work. The testing plan proposed uses laboratory test equipment to simulate the application of multiple axle loads on laboratory prepared asphalt specimens.

  • 1. INTRODUCTION
  • 2. FATIGUE TESTING MODE AND DISSIPATED ENERGY
    • 2.1. General
    • 2.2. Controlled Stress and Controlled Strain Fatigue Tests
    • 2.3. Dissipated Energy
  • 3. RECENT STUDIES
    • 3.1. General
    • 3.2. Pavement Response to Multiple Axle Loads: BASt Study
    • 3.3. Laboratory Fatigue Assessment under Simulated Multiple Axle Loads: Michigan State University Study
    • 3.4. Effect of Different Wave Forms and Rest Periods on Laboratory Fatigue: Chuo University Study
    • 3.5. Pavement Response to Multiple Axle Loads and Preliminary Laboratory Testing: LCPC Study
    • 3.6. Endurance Limit in Laboratory Asphalt Fatigue Testing
  • 4. PROPOSED WORK
    • 4.1. Approach
    • 4.2. Equipment
      • 4.2.1. Sample Preparation
      • 4.2.2. Fatigue Testing Equipment and Control
      • 4.2.3. Post-processing and Dissipated Energy
    • 4.3. Parameters
    • 4.4. Load Pulse Shape Generation
    • 4.5. Study Components
      • 4.5.1. General
      • 4.5.2. Study 0 – Breaking Strain and Test Frequency (Preliminary Study)
      • 4.5.3. Study 1 – Effect of Strain Direction
      • 4.5.4. Study 2 – Effect of Level of Axle Interaction
      • 4.5.5. Study 3 – Effect of Load Level
      • 4.5.6. Study 4 – Effect of the Number of Axles in Axle Groups
  • 5. RESEARCH RECOMMENDATIONS
  • REFERENCES
  • APPENDIX A MIX DESIGN OF ASPHALT SPECIMENS
  • APPENDIX B LOAD PULSE SHAPES (ASSUMING FULL WIDTH IS QUAD-AXLE GROUP)
  • APPENDIX C LOAD PULSE SHAPES (ASSUMING FULL WIDTH IS TRIAXLE GROUP)