Pavement

Cover of Review of stone mastic asphalt design concepts
Review of stone mastic asphalt design concepts
  • Publication no: AP-T138-09
  • ISBN: 978-1-921551-45-1
  • Published: 19 June 2009

A study of published information regarding the design and development of stone mastic asphalt (SMA) was undertaken. The main focus was upon obtaining information that had resulted in successful SMA mixes. In most instances the design of SMA had used a recipe type approach in which the aggregate grading and the binder content were provided. Some other design processes had used simple rules with minor adjustments to cater for variations in aggregate. In recent years there had been a move to develop a more rational approach to the design of SMA. Three design principles for optimising the aggregate gradation were studied in greater detail and these included the dilation concept, the lock up concept and the Bailey method. A small amount of laboratory work was done by the author to examine the dilation and lock up concepts.

  • Project Manager
  • Prepared by
  • Austroads membership
  • 1. PAST EXPERIENCE
    • 1.1. Overview
    • 1.2. Typical Properties
    • 1.3. Mix Design
      • 1.3.1. Aggregate
      • 1.3.2. Filler
      • 1.3.3. Binder
      • 1.3.4. Volumetrics
      • 1.3.5. Fibres
      • 1.3.6. Compaction
      • 1.3.7. Target Grading
      • 1.3.8. Performance Tests
    • 1.4. Production
    • 1.5. Placement
  • 2. DEVELOPING THE GRADATION
    • 2.1. Dilation
    • 2.2. Lock Up
    • 2.3. The Bailey Method
    • 2.4. Dutch Approach
    • 2.5. Mix Volume Ratio
  • 3. BINDER MASTIC
    • 3.1. Viscosity of Binder Mastic
    • 3.2. Free and Fixed Binder
  • 4. CONCLUSIONS
  • 5. FURTHER RESEARCH
  • REFERENCES