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Cover of Development of a Durability Test Method for Sprayed Sealing Binders: A Field Validation Study
Development of a Durability Test Method for Sprayed Sealing Binders: A Field Validation Study
  • Publication no: AP-T298-15
  • ISBN: 978-1-925294-50-7
  • Published: 3 July 2015

This report presents the results of a field validation study that was conducted as part of the development of a new long-term ageing (durability) test for bituminous binders used in sprayed seals in Australia.

The field validation study of the new durability test method was conducted using field property information collected from a sprayed sealing trial site constructed at Coober Pedy in South Australia. Analysis of the results from dynamic shear rheometer (DSR) flow tests and Fourier transform infrared spectroscopy (FTIR) tests found a reasonable similarity between the ageing process simulated using the pressure ageing vessel (PAV) for a short time (e.g. 30 hours) and the ageing process which occurred in the field for a certain service period (e.g. 3 years).

The validation study suggested that PAV treatment is able to produce artificially aged binders which are quite similar to field aged binders that have been in service for a long time. Due to this, PAV treatment of binders appears to be a suitable approach for ageing binders in the new durability test method.

  • Summary
  • 1. Introduction
    • 1.1. Australian Bitumen Durability Test Method and Issues
    • 1.2. Development of New Bitumen Durability Test Method
    • 1.3. Austroads TT1818 Project: Development of New Binder Durability Test Method
  • 2. Field Validation Study: Methodology
    • 2.1. Construction of Field Validation Sites and Year 2 Project Work
    • 2.2. Current Year’s Project Work (Year 3)
      • 2.2.1. Field Validation of Ageing Treatment
      • 2.2.2. Field Validation of the Post-ageing Characterisation Test and Limitations
  • 3. Materials
    • 3.1. Collection of Binders Aged in the Field
    • 3.2. Laboratory Ageing of Binders Used to Construct Trial Sites
  • 4. PAV Ageing Treatment Method
    • 4.1. 72-hour PAV Ageing Regime for the New Durability Test
    • 4.2. 30-hour PAV Ageing Regime
      • 4.2.1. Development of PAV Bitumen Hardening Model
  • 5. DSR Flow Test
    • 5.1. DSR Flow Test Procedure
    • 5.2. DSR Flow Test: Data Interpretation Methodology
  • 6. DSR Flow Test: Qualitative Analysis of Stress–Strain Curves
    • 6.1. Interpretation of the DSR Flow Test Stress–strain Curves
      • 6.1.1. Viscoelastic Analysis of Elastometer Stress–strain Curves
      • 6.1.2. Discussion on the Gradual Reduction of DSR Flow Stress–strain Curves
    • 6.2. C170 Bitumen
    • 6.3. S10E
    • 6.4. S15E
    • 6.5. S20E
    • 6.6. S35E
    • 6.7. Shell S5E
    • 6.8. SAMI S20E SS
    • 6.9. Qualitative Analysis of Stress–strain Curves: Discussion
      • 6.9.1. Discussion on Bitumen Components in PMBs
      • 6.9.2. Loss on Heating Tests on Coober Pedy Binders
      • 6.9.3. Discussion on Polymer Components in PMBs
  • 7. DSR Flow Test: PAV-Field Ageing Time Relationship Investigation
    • 7.1. Ageing of Bitumens and PMBs
    • 7.2. Determination of PAV-field Ageing Time Relationships
    • 7.3. Discussion on the Effect of Different Types of Hardening
  • 8. Fourier Transform Infrared Spectroscopy Tests
    • 8.1. FTIR Tests on PAV and Field Aged Binders
    • 8.2. Review of FTIR Test Results
    • 8.3. Investigation into the Relationship between PAV and Field Ageing Time
  • 9. Investigation of Cooma Binders
    • 9.1. DSR Flow Test Results
    • 9.2. FTIR Test Results
    • 9.3. GPC Test and Test Results
  • 10. Summary and Conclusions
  • References