Pavement
Guidelines and Specifications for Microsurfacing
- Publication no: AP-R569-18
- ISBN: 978-1-925671-56-8
- Published: 8 June 2018
- Edition: 1.1
- PDF (free) Download
Guidelines and Specification for Microsurfacing provides guidelines for the use of microsurfacing treatments in Australia. Microsurfacing is presently the only type of bituminous slurry surfacing applied in Australia.
The document was produced by the Austroads Bituminous Surfacings Working Group. The guidelines are based on extensive experience gained in the use of the material across the country over the last 25 years.
The publication provides specific guidelines to assist road asset owners or managers in the use of microsurfacing materials and a model specification to be used as a framework when developing a national or local microsurfacing specification.
On 8 June 2018 Version 1.1 of this publication was published.
Changes to this edition include:
- Bitumen emulsion changed to bituminous emulsion throughout.
- Additional information provided about applications of microsurfacing in Section 3.1.
- Clarification on the use of Size 7 microsurfacing in Section 3.3.
- Additional information about the minimum time between layers in Section 7.3.
- Additional Section A.9.6 Rolling.
- Clarification on the measurement of surface shape in Section A.10.2.
- New hold point added in Section A.10.3.
- References and cross references updated throughout.
- Minor text edits throughout.
- Summary
- 1. Scope
- 2. Definitions
- Bituminous emulsion
- Polymer modified emulsion (PME)
- Bituminous slurry surfacing
- Microsurfacing
- Slurry seal
- Paving unit
- Higher performance additives
- 3. Descriptors
- 3.1 Applications of Microsurfacing
- 3.2 Types of Bituminous Slurry Surfacings
- 3.2.1 Slurry Seal
- 3.2.2 Microsurfacing
- 3.2.3 High Performance Microsurfacing
- 3.3 Nominal Sizes of Microsurfacing
- 4. Materials
- 4.1 Mineral Aggregate
- 4.2 Mineral Filler
- 4.3 Binder
- 4.4 Water
- 4.5 Additives
- 4.6 Higher Performance Additives
- 5. Mix Design
- 5.1 Responsibility for Mix Design
- 5.2 Mix Design Criteria
- 5.2.1 Aggregate and Binder Properties
- 5.2.2 Abrasion (Wear) Loss
- 5.2.3 Traffic Time/Material Cohesion
- 5.2.4 Excess Binder Content
- 5.2.5 Mix Consistency
- 5.2.6 Mix Performance
- 5.3 Mix Design Currency
- 6. Plant
- 6.1 Provision of Plant
- 6.1.1 Paving Unit
- 6.1.2 Ancillary Equipment
- 6.2 Paving Unit Calibration
- 6.1 Provision of Plant
- 7. Field Application
- 7.1 Preparation of Existing Surface
- 7.1.1 Set Out
- 7.1.2 Cleaning
- 7.1.3 Protection of Services and Road Fixtures
- 7.1.4 Surface Defects
- 7.1.5 Tack Coat
- 7.1.6 Water Fog Coat
- 7.2 Weather Limitations
- 7.3 Rut-filling and Correction
- 7.4 Multiple-layer Applications
- 7.5 Spreading
- 7.5.1 Process
- 7.5.2 Surface Finish
- 7.5.3 Shape
- 7.5.4 Joints
- 7.5.5 Traffic Time
- 7.5.6 Rolling
- 7.1 Preparation of Existing Surface
- 8. Sampling and Testing
- 8.1 Compliance Testing
- 8.2 Compliance Criteria
- 8.2.1 Method of Sampling
- 8.2.2 Frequency of Testing
- 8.2.3 Surface Finish
- 9. Defective Work or Materials
- 10. Measurement and Payment
- 10.1 Surface Preparation
- 10.2 Microsurfacing
- 11. Quality Assurance (QA)
- 11.1 Quality Requirements
- 11.2 Quality Plan
- 11.3 Hold Points
- References
- Appendix A Model Specification for Microsurfacing
- A.1 Scope
- A.2 Referenced Documents
- A.3 Definitions
- A.4 Work Items
- A.5 Work Operations
- A.6 Materials
- A.6.1 Mineral Aggregate
- A.6.2 Mineral Filler
- A.6.3 Binder
- A.6.4 Water
- A.6.5 Additives
- A.7 Mix Design
- A.7.1 Responsibility for Mix Design
- A.7.2 Mix Design Criteria
- A.7.3 Mix Design Submission
- A.8 Plant
- A.8.1 Provision of Plant
- A.8.2 Paving Unit Calibration
- A.9 Field Applications
- A.9.1 Preparation of Existing Surface
- A.9.2 Weather Limitations
- A.9.3 Rut-filling and Correction
- A.9.4 Spreading
- A.9.5 Control of Traffic
- A.9.6 Rolling
- A.10 Sampling and Testing
- A.10.1 Sampling
- A.10.2 Compliance Testing
- A.10.3 Frequency of Testing
- A.11 Defective Work or Materials
- A.12 Measurement and Payment
- A.12.1 Surface Preparation
- A.12.2 Microsurfacing
- A.12.3 Rolling
- A.13 Application and Measurement Details
- A.13.1 Rolling
- A.13.2 Surface Texture Depth
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