Pavement

Cover of Field Validation of Warm Mix Asphalt Pavements
Field Validation of Warm Mix Asphalt Pavements
  • Publication no: AP-T214-12
  • ISBN: 978-1-921991-56-1
  • Published: 8 November 2012

This report describes the planning and conduct of a validation trial of three warm mix asphalt surfacings (chemical additive, polymer additive, foaming) and a hotmix asphalt ‘control’ surfacing at a site in Melbourne, Australia. Issues addressed include the establishment of the validation site, the experimental design, a description of the site, details of the mixes tested, the condition parameters monitored, and the performance of the surfacings after two years of trafficking. Performance after two years of trafficking was excellent and also independent of asphalt mix type, type of warm mix asphalt, and the percentage of RAP (0-50%) incorporated into the mix. Details of the laboratory testing program, the results and an interpretation of the data are the subject of a companion report.

  • 1. INTRODUCTION
  • 2. WARM MIX ASPHALT
  • 2.1.1. Evaluation Protocol: Field Validation
  • 3. VALIDATION SITE: EXPERIMENT DESIGN
  • 3.3.1. Pre-construction
  • 3.3.2. Construction
  • 3.3.3. Short-term and Long-term Monitoring
  • 4. DETAILS OF VALIDATION SITE
  • 4.3.1. Patching Prior to Overlay
  • 4.3.2. Construction of Overlays
  • 4.4.1. Location and Temperature of Mixes at Construction
  • 4.4.2. Thickness of Asphalt Cores
  • 5. DATA COLLECTION AND ANALYSIS
  • 5.1.1. Cracking
  • 5.1.2. Condition Monitoring
  • 5.2.1. Traffic
  • 5.2.2. Cracking: Manual Survey
  • 5.2.3. Cracking: Network Survey Vehicle
  • 5.2.4. Comparison of Methods
  • 6. EVALUATION OF DRAFT PROTOCOL: FIELD EVALUATION
  • 6.1.1. Development Trials
  • 6.1.2. Production/Demonstration Trials
  • 6.1.3. Validation/Implementation Trials
  • 6.1.4. Summary
  • 7. CONCLUSIONS