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Test Methods and Specifications

Cover of Plant Mix Pavement Stabilisation Using Foamed Bitumen
Plant Mix Pavement Stabilisation Using Foamed Bitumen
  • Publication no: ATS-3340-25
  • Published: 17 September 2025
  • Edition: 1.0

Austroads Technical Specification ATS 3340 sets out the requirements for the construction of a stabilised pavement using foamed bitumen and secondary stabilising binders that has been mixed in a stationary pugmill.

The technical requirements for the mix design of the stabilised material are excluded from this Specification.

This technical specification is also available as a Word document.

  • 1. Scope
  • 2. Referenced Documents
  • 3. Definitions
  • 4. Quality System Requirements
  • 5. Approval of the Mix Design
  • 6. Constituent Materials
    • General
    • Material to be Stabilised
    • Stockpiling of Material to be Stabilised
    • Stabilising Binders
    • Water
    • Foaming Agent
    • Testing and Approval of Constituent Materials
  • 7. Plant and Equipment
    • General
    • Manufacturing, Mixing, Delivery and Paving Equipment
    • Intelligent Construction Rollers
  • 8. Construction of the Stabilised Pavement
    • Quality Plan
      • Preparatory Work
      • Manufacture of the Stabilised Material
      • Placement
      • Stabilised Material Placed in Two Layers (where applicable)
    • General
    • Trial Pavement
    • Allowable Working Time
    • Conditions for Placement of Stabilised Material
    • Material Not Incorporated into the Pavement
    • Segregation
  • 9. Preparatory Work
    • Existing Structures and Utilities
    • Preparation of the Existing Surface
    • Crack Filling
    • Strain Alleviating Geotextile Strips
  • 10. Manufacture of the Stabilised Material
    • General
    • Plant Calibration
    • Temperature of Material to be Stabilised
    • Production of the Foamed Bitumen
    • Moisture Ratio (uncompacted) of Feed Stockpile (MRu FSP)
    • Primary Stabilising Binder Content
    • Secondary Stabilising Binder Content
    • Moisture Ratio Foamed Bitumen (MRu FB)
    • Resilient Modulus (Ex-plant)
    • Stockpiling of Stabilised Material
  • 11. Conformity of the Manufactured Stabilised Material
  • 12. Placing, Shaping and Compacting the Stabilised Material
    • General
    • Layer Thickness
    • Placement
    • Intelligent Construction
    • Construction Joints
    • Compaction
    • Trimming After Compaction
    • Trafficking the Stabilised Layer
    • Curing
    • Maintenance of the Stabilised Layer
  • 13. Placement of Stabilised Material in Two Layers
    • General
    • Preparation Prior to Placing an Overlying Stabilised Layer
    • Hard-Cut Method
    • Spray Seal Interlayer
    • Padfoot Surface Preparation
  • 14. Conformity of the Stabilised Pavement
    • General
    • Conformance Testing
    • Time Limits for Testing
    • Surface Finish
    • Road Roughness
    • Compaction
    • Proof Rolling
  • 15. Conformity – Geometrics
    • General
    • Geometric Tolerances
    • Vertical Tolerances
    • Deviation from a Straightedge
    • Crossfall
  • 16. Acceptance
  • Annexure A Summary of Hold Points, Witness Points and Records
  • Annexure B Examples of Pavement Layer Surfaces
  • Amendment Record Attachment
  • Attachment A: Contract Specific Requirements
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