Fatigue performance of foamed bitumen stabilised pavements under full-scale accelerated loading

This report presents the findings of a project that evaluates the fatigue performance of foamed bitumen stabilised (FBS) pavements under accelerated loading. Using accelerated pavement testing, the project evaluated three FBS host materials (100% crushed rock and two blends with 50% reclaimed asphalt pavement, and 80% previously cemented material). Each host material was stabilised with 3% bitumen and 2% hydrated lime. Accelerated loading cumulated over 3.6 million axle passes applied through a dual-wheel assembly initially loaded to 40 kN, and later increased to 60 kN. The inclusion of 50% RAP increased the fatigue performance without detrimental effect on rut resistance. Whilst the average field fatigue performance of the previously cemented stabilised mix was similar to that of 100% crushed rock, performance variability needs further consideration on a risk-based basis for highly stressed applications. This report proposes a new definition for FBS design modulus and developing improved in-service fatigue relationships for structural thickness design of FBS layers. These relationships will utilise new laboratory fatigue relationships together with laboratory-to-field shift factors developed to reflect in-service performance.

• Record URL:
  • https://austroads.com.au/publications/pavement/ap-t363-22
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9781922700308
• Supplemental Notes:
  • Austroads Project TT2046
• Corporate Authors:

  Austroads

  Sydney, New South Wales   
• Authors:
  • Bodin, D
  • Garton, D
  • Grenfell, J
  • Zhalehjoo, N
• Publication Date: 2022-3

Media Info

• Pagination: 123p

Subject/Index Terms

• TRT Terms: Accelerated tests; Asphalt pavements; Axle loads; Crushed rock; Fatigue (Mechanics); Pavement design; Pavement performance; Pavements; Test procedures; Waste products (Materials)
• Uncontrolled Terms: Crushed stone; Foam bitumen
• ATRI Terms: Accelerated testing; Axle load; Crushed stone; Foamed bitumen; Material fatigue; Pavement design; Pavement performance; Reclaimed asphalt pavement; Stabilization
• ITRD Terms: 5579: Fatigue (mater); 4974: Foamed bitumen; 4966: Reclaimed asphalt; 3688: Roadbase stabilization
• Subject Areas: Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01841404
• Record Type: Publication
• Source Agency: ARRB Group Limited
• ISBN: 9781922700308
• Report/Paper Numbers: AP-T363-22
• Files: ITRD, ATRI
• Created Date: Apr 4 2022 3:44PM