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Cover of Impact of Rising Watertables and Salinity in Pavement Performance
Impact of Rising Watertables and Salinity in Pavement Performance
  • Publication no: AP-T121-08
  • ISBN: 978-1-921551-00-0
  • Published: 12 November 2008
Austroads sponsored a technical research project Managing the Impacts of Rising Watertables and Salinity on Pavement Performance . The overall desirable deliverables were tools to assist road authorities to identify those sections of road that are at risk of damage due to rising watertables and associated salinity issues and guidelines for solutions (design and treatments) that could be used to address the problem. This final project report describes the work conducted under this project, including a review of earlier work, the work conducted in 2005/2006, a field trial conducted at Forbes, NSW, in 2006/2007, associated field and laboratory work, the conduct and results of a geochemical analysis of the pavement materials and subsequent analysis. Recommendations for further work as a result of this project are also included.
  • AP-T121/08 Impact of Rising Watertables and Salinity on Pavement Performance
  • SUMMARY
  • CONTENTS
  • 1. INTRODUCTION
  • 2. SUMMARY OF WORK CONDUCTED IN 2005/2006
    • 2.1. Commentaries
  • 3. TRIAL METHODOLOGY
    • 3.1. Details of Test Pavements
    • 3.2. Geophysical Survey
    • 3.3. Engineering Investigations
    • 3.4. Geochemical Assessment
  • 4. RESULTS
    • 4.1. Geophysical Survey
    • 4.2. Pavement Investigations
    • 4.3. Geochemical Testing Results
  • 5. DISCUSSION
    • 5.1. EM38 Survey Results and Salinity of Materials
    • 5.2. Implications for Pavement Maintenance
    • 5.3. Use of EM Survey as a Risk Assessment Tool
  • 6. CONCLUSIONS AND RECOMMENDATIONS
    • 6.1. Further Work
  • REFERENCES
  • APPENDIX A PHOTOS OF TEST SITES
  • APPENDIX B PLOTS OF MAXIMUM AND TOLERABLE DEFLECTIONS: NEWELL HIGHWAY
  • COMMENTARY 1 MECHANISMS OF SALT BUILD-UP
  • COMMENTARY 2 HOW DOES SALINITY AFFECT ROADS?
  • COMMENTARY 3 LITERATURE REVIEW
  • COMMENTARY 4 CLIMATE ASSESSMENT AND WATERTABLE TRENDS
  • COMMENTARY 5 USE OF EM SURVEYS AS A RISK ASSESSMENT TOOL
  • COMMENTARY 6 CONDUCTIVITY OF SOIL AND ROCK
  • COMMENTARY 7 GEOCHEMISTRY OF ROAD MATERIALS
  • INFORMATION RETRIEVAL
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