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Cover of Guide to Pavement Technology Part 4J: Aggregate and Source Rock
Guide to Pavement Technology Part 4J: Aggregate and Source Rock
  • Publication no: AGPT04J-08
  • ISBN: 978-1-921329-87-6
  • Published: 5 September 2008
  • Edition: 1.1
  • Superseded

Part 4J of the Guide to Pavement Technology provides information and guidance on: the classification and description of source rocks; the properties of source rock materials that need to be specified to ensure a durable end product; and quality assurance testing. It is recognised that local knowledge of material behaviour along with the experience and knowledge of the various construction authorities will give rise to differences in the test values and types of tests used in specifications. Austroads, however, encourages uniformity of practice in respect of specification of road construction materials and it is hoped that the publication of this Part will help facilitate this.

Edition 1.1 updates the Guide format, no text changes were made.

  • 1. Introduction
    • 1.1 Scope
    • 1.2 Background
      • 1.2.1 Improved Understanding of Durability
      • 1.2.2 Increased Heavy Vehicle Loadings
      • 1.2.3 Improved Quarry Plant
      • 1.2.4 Uniformity of Practice in Specification
  • 2. Classification and Description of Source Rocks
    • 2.1 Introduction
    • 2.2 Igneous Rocks
    • 2.3 Sedimentary Rocks
    • 2.4 Metamorphic Rocks
    • 2.5 Natural Sands and Gravels
    • 2.6 Blast Furnace Slag
  • 3. Properties Requiring Specification
    • 3.1 Introduction
    • 3.2 Rock Distress Mechanisms
    • 3.3 Durability
    • 3.4 Developments in Durability Assessment
    • 3.5 Types and Descriptions of Durability Tests
      • 3.5.1 Wet/dry Strength Variation
      • 3.5.2 Los Angeles Value
      • 3.5.3 Sulphate Soundness Loss
      • 3.5.4 Degradation Factor
      • 3.5.5 Accelerated Soundness Index
      • 3.5.6 Secondary Mineral Content
      • 3.5.7 Unsound Stone Content
      • 3.5.8 Alkali Reactivity
      • 3.5.9 Weathering Quality Index for Course Aggregate
    • 3.6 Approaches to Durability Control
    • 3.7 Specification of Durability
      • 3.7.1 Uniform Sources
      • 3.7.2 Durability Changes with Product Size
      • 3.7.3 Blended Materials
      • 3.7.4 Non-uniform Sources
      • 3.7.5 Recycled Materials
  • 4. Quality Assessment
    • 4.1 Assessment of Rock Source
    • 4.2 Sampling
    • 4.3 Testing
  • References
  • Appendix A Classification and Description of Source Rocks
    • A.1 Composition of Rock Material
      • A.1.1 Rock Type
      • A.1.2 Grain Size
      • A.1.3 Texture and Fabric
      • A.1.4 Colour
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