World of Asphalt Pavements Feedback Sydney

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World of Asphalt Pavements FeedbackSydney

• Stephen Emery

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• Year 2000 'World of Asphalt Pavements'
  International Conference
• The Flexible Path for the 21st Century
• February 20-24, 2000 Sydney, Australia

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Session 1 Australasian Overview of World Issues

• Innovation in Specifications and Contractual
  Arrangements - towards performance contracting,
  Australia

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Session 2A Design Concepts

• Compass to design functional mixes, Netherlands
• Design and vacuum creep on SMA, Australia

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Session 2B Innovative Surfaces 1

• Microsurfacing for heavily trafficked roads,
  Australia

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Session 2C Binders Cold

• Emulsion Priming of Road Bases, Australia

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Session 3A Performance Testing

• Evaluation of field and laboratory fatigue
  properties of asphalt mixes, Australia

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Session 3B Aggregate/Binder Properties

• Detecting and measuring segregation, USA

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Session 3C Binders Hot

• Specialty binders with improved fuel resistance,
  Australia

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Session 4 Working Together achieving better
safer outcomes

• Keynote Asphalt paving health effects research
  and development in the United States, Asphalt
  Institute, USA

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Session 5 European Overview of World Issues

• Use of innovative contracts in Sweden
• LCI (Life Cycle Inventory) for asphalt in Green
  Procurement, Denmark

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Session 6A Innovative Surfaces 2

• Porous asphalt, NZ
• Stone mastic asphalt performance related
  material specification and experience, NZ

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Session 6B Application Innovation

• MultiPaver - road maintenance, Australia
• Reduced thickness bitumen rubber asphalt leads to
  cost effective pavement rehabilitation, USA

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Session 6C Environmental Aspects

• Low noise asphalt concrete containing tyre
  rubber, France
• Use of PG asphalt cement in recycled Hot Mix,
  USA/Canada

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Session 7A Binder Specification/Development

• Australian Performance Based Binder
  Specifications
• Multi purpose (multigrade) high performance
  binder, Mobil
• Multibita new high performance (multigrade)
  bitumen, BP

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Session 7B Aggregate/Surface Texture

• Evaluation of Superpave fine aggregate
  specification, USA
• Aggregate suitability (stripping potential) for
  asphalt using methylene blue test, Australia
• Hardness testing of pavement surfaces, NZ
• Comparison of methods to measure road surface
  macrotexture, NZ

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Session 7C Costing/Statistical Control

• Asphalt Mixture Proportioning Mix Design and
  Production Compared, USA

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Session 8 Performance Outcomes more than just
a good idea

• Partnering in Road Construction, RSA
• Simple Performance Test - AASHTO 2002 Design
  Guide, USA

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Session 9 North American Overview of World Issues

• Innovations in Materials and Mix Design
• Developments in Specifications and Contract
• Construction Equipment Developments,
• HMA Work Force Issues for the 21st Century

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Session 10 An International Potpourri

• Australian Asphalt Mix Design Procedure,
  Australia
• Experience with thin and ultra-thin HMA pavements
  in the United States, USA

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Australian Asphalt Mix Design Procedure

• Gyratory compaction is used in design
• Flexural modulus, not resilient modulus
• Creep slope is sensitive to air voids not good
  assessment of rutting. Wheel-tracking test to be
  used in future.
• Rutting controlled by
• Air voids of 2.5 at refusal density (350
  gyrations)
• Wheel tracking results

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Session 11 Southern African Overview of World
Issues

• Procurement protocol for modified binders
• New hotmix design method for southern Africa
• Development of a product certification system
• Pavement performance evaluation as input to
  stochastic asset management

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Session 12 Progress along the World Highway of
the 21st Century

• Technological developments under long term road
  maintenance, Australia
• Implications of long term road maintenance
  contracts for the asphalt industry, South Africa

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Closure

• Opportunity to benchmark South Africa
  internationally
• We saw that South African issues parallel world
  issues
• we are living in a global society
• Next WOAP conference
• Jointly with CAPSA?
• 2004?
• Held in South Africa?

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