Pavement

Cover of The Durability of Australian Bitumens 1956-2004
The Durability of Australian Bitumens 1956-2004
  • Publication no: AP-T86-07
  • ISBN: 978-1-921329-20-3
  • Published: 1 October 2007
Background information is given on the durability test procedure and the road trial program which validated the test. The durability test result gives an indication of the long term rate of hardening of a bitumen in field service. Durability results for 61 bitumens, covering the period 1956 to 2004, are presented, together with available information on the source of each bitumen and processing conditions. After the introduction of a durability specification by some State Road Authorities in 1978 the range of the durability values of C170 bitumens was reduced. Desirable limits for the asphaltene content and durability of propane precipitated asphalt (PPA) bitumens are indicated. Air blown bitumens tend to have slightly superior rheological properties compared to PPA bitumens but poorer durability. Lower refinery blowing temperatures are associated with improved durability, and are preferred for this reason.
  • AP-T86/07 The Durability of Australian Bitumens 1956 – 2004
  • 1. INTRODUCTION
  • 2. DURABILITY
    • 2.1. Durability and Sprayed Seal Life
    • 2.2. Bitumen Hardening Mechanism
    • 2.3. ARRB Bitumen Durability Test
    • 2.4. Validation of the Durability Test
  • 3. RESULTS OF DURABILITY TESTING OF SAMPLES
    • 3.1. ARRB Library
    • 3.2. Results and Sample Description
    • 3.3. Binders Containing Additives
    • 3.4. Change in Durability with Time
    • 3.5. Relationship with Asphaltene Content
  • 4. THE EFFECT OF BLOWING TEMPERATURE ON DURABILITY
  • 5. CONCLUSIONS
  • REFERENCES