Pavement

Cover of Fatigue Performance of Cemented Materials under Accelerated Loading: Influence of Vertical Loading on the Performance of Unbound and Cemented Materials
Fatigue Performance of Cemented Materials under Accelerated Loading: Influence of Vertical Loading on the Performance of Unbound and Cemented Materials
  • Publication no: AP-T102-08
  • ISBN: 978-1-921329-75-3
  • Published: 14 August 2008
This research involved a performance assessment of two cemented pavement materials using the Accelerated Loading Facility (ALF) to simulate heavy axle loading. The assessment involved a number of axle loads from a standard half axle load of 40 kN to double this load which allowed the fatigue life of the cemented materials to be determined as well as estimates of the load damage exponents. A laboratory study was conducted on the same two cemented materials to assess their strength, modulus and fatigue properties. The laboratory fatigue results generally compared well with the full scale ALF performance results and hence the laboratory test was considered useful for fatigue assessment of cemented materials. The study concluded that the load damage exponent for the two cemented materials varied between 5 and 8 and that the results did not support the current load damage exponent of 12 suggested for cemented materials in the Austroads guide to pavement technology.
  • AP-T102/08 FATIGUE PERFORMANCE OF CEMENTED MATERIALS UNDER ACCELERATED LOADING – INFLUENCE OF VERTICAL LOADING ON THE PERFORMANCE OF UNBOUND AND CEMENTED MATERIALS
  • 1. INTRODUCTION
    • 1.1. Project Objectives for Cemented Materials Research
    • 1.2. Aims of the Full Scale Load Accelerated Pavement Testing
  • 2. BACKGROUND ON FATIGUE OF CEMENTED MATERIALS
    • 2.1. Cemented Materials Fatigue Relationships in Australia
    • 2.2. Overseas Fatigue Relationships for Cemented Materials
  • 3. THE ACCELERATED LOADING FACILITY (ALF)
    • 3.1. Description of ALF
  • 4. EXPERIMENT DESIGN
    • 4.1. Scope
    • 4.2. Materials Selection
    • 4.3. Test Pavement Thickness Design
    • 4.4. Axle Loads Applied and Layout of Experiments
    • 4.5. Lateral Distribution for ALF Trafficking
  • 5. TEST PAVEMENT CONSTRUCTION
  • 6. LABORATORY CHARACTERISATION OF THE CEMENTED BASE MATERIALS
  • 7. ACCELERATED LOADING TEST PROGRAM
  • 8. PARAMETERS FOR PAVEMENT ASSESSMENT
    • 8.1. Visual Inspection and Pavement Trenching
    • 8.2. Pavement Deflection
    • 8.3. Surface Deformation
    • 8.4. Pavement Deflection at Depth Using Multi-Depth Deflectometers (MDD)
    • 8.5. Horizontal Tensile Strain at the Base of the Cemented Layer
  • 9. PAVEMENT PERFORMANCE UNDER ACCELERATED LOADING
    • 9.1. Visual Observations
    • 9.2. Pavement Deflection
    • 9.3. Pavement Deformation
    • 9.4. Deflection and Deformation at Depth from MDDs
    • 9.5. Pavement Strain
  • 10. ANALYSIS
    • 10.1. Summary of Analysis
    • 10.2. Parameters for the Fatigue Analysis
    • 10.3. Back-calculation of the Cemented Base Modulus
    • 10.4. Definition of Fatigue Life for the Cemented Materials
    • 10.5. Estimation of Load Damage Exponents from Mean Data for Each Experiment
    • 10.6. Estimation of Load Damage Exponents Using Individual Chainage Locations
  • 11. STUDY LIMITATIONS AND FURTHER RESEARCH
  • 12. SUMMARY AND CONCLUSIONS
  • REFERENCES