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Cover of Uncertainty of Measurement Estimates for Austroads Asphalt Test Methods
Uncertainty of Measurement Estimates for Austroads Asphalt Test Methods
  • Publication no: AP-T191-11
  • ISBN: 978-1-921991-03-5
  • Published: 28 October 2011

The development of an Austroads asphalt mix design procedure led to adaptation and adoption of a number of overseas test methods. These test methods were then compiled into what has become a suite of Austroads test methods. The Austroads test methods have since been used in a number of specifications and this has required that the accuracy of these methods be scrutinised. The five asphalt test methods that have been reviewed are binder drain-off, particle loss, fatigue life, stripping potential of asphalt, and wheel tracking.

  • 1. INTRODUCTION
  • 2. METHOD
    • 2.1. Major Factors
    • 2.2. Standard Uncertainty
    • 2.3. Sensitivity
    • 2.4. Calculation of Expanded Uncertainty
  • 3. BINDER DRAIN-OFF
    • 3.1. Identification of Major Factors
    • 3.2. Standard Uncertainties
      • 3.2.1. Mass Determinations on an Electronic Balance
      • 3.2.2. Convection Currents
      • 3.2.3. Temperature
      • 3.2.4. Duration in the Oven
      • 3.2.5. Duration of Inversion
    • 3.3. Sensitivity
      • 3.3.1. Mass Determinations on an Electronic Balance
      • 3.3.2. Convection Currents
      • 3.3.3. Temperature
      • 3.3.4. Time in Oven
      • 3.3.5. Beaker Inversion Time
    • 3.4. Calculation of Uncertainty
  • 4. PARTICLE LOSS
    • 4.1. Identification of Major Factors
    • 4.2. Standard Uncertainties
      • 4.2.1. Mass Determinations on an Electronic Balance
      • 4.2.2. Temperature
      • 4.2.3. Number of Revolutions
      • 4.2.4. Diameter of Los Angeles Drum
    • 4.3. Sensitivity
      • 4.3.1. Mass Determinations on an Electronic Balance
      • 4.3.2. Temperature
      • 4.3.3. Number of Revolutions
      • 4.3.4. Los Angeles Drum Diameter
    • 4.4. Calculation of Expanded Uncertainty
  • 5. FATIGUE LIFE
    • 5.1. Identification of Major Factors
    • 5.2. Standard Uncertainties
      • 5.2.1. LVDT
      • 5.2.2. Electronic Load Cell
      • 5.2.3. Timing
      • 5.2.4. Beam Dimensions
      • 5.2.5. Temperature
      • 5.2.6. Air Void Content of the Beams
      • 5.2.7. Applied Strain
      • 5.2.8. Tensile Stress
      • 5.2.9. Initial Flexural Stiffness
    • 5.3. Sensitivity
      • 5.3.1. Temperature
      • 5.3.2. Air Void Content of the Beams
      • 5.3.3. Applied Strain
      • 5.3.4. Tensile Stress
      • 5.3.5. Initial Flexural Stiffness
    • 5.4. Calculation of Expanded Uncertainty
      • 5.4.1. Applied Strain
      • 5.4.2. Tensile Stress
      • 5.4.3. Initial Flexural Stiffness
      • 5.4.4. Fatigue Life
  • 6. STRIPPING POTENTIAL OF ASPHALT
    • 6.1. Identification of Major Factors
    • 6.2. Standard Uncertainties
      • 6.2.1. Sample Dimensions
      • 6.2.2. Electronic Load Cell
      • 6.2.3. Loading Rate
      • 6.2.4. Temperature
    • 6.3. Sensitivity
      • 6.3.1. Tensile Strength
      • 6.3.2. Temperature
    • 6.4. Calculation of Expanded Uncertainty
  • 7. WHEEL TRACKING
    • 7.1. Identification of Major Factors
    • 7.2. Standard Uncertainties
      • 7.2.1. Tracking Depth
      • 7.2.2. Number of Cycles
      • 7.2.3. Temperature
      • 7.2.4. Applied Load
      • 7.2.5. Sample Thickness
      • 7.2.6. Air Void Content of the Slabs
      • 7.2.7. Oscillation Frequency
      • 7.2.8. Table Travel
    • 7.3. Sensitivity
      • 7.3.1. Tracking Depth
      • 7.3.2. Number of Cycles
      • 7.3.3. Temperature
      • 7.3.4. Applied Load
      • 7.3.5. Air Void Content
      • 7.3.6. Oscillation Frequency
      • 7.3.7. Table Travel
    • 7.4. Calculation of Expanded Uncertainty
  • 8. CONCLUSIONS
  • REFERENCES
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