Pavement
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
- PDF (free) Download
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)
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