Pavement
- Publication no: AP-T202-12
- ISBN: 978-1-921991-30-1
- Published: 31 May 2012
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This report is an investigation on the development of the performance relationships used in the 2002 AASHTO Mechanistic-Empirical Pavement Design Guide (MEPDG). The primary objective of this investigation was to see if these relationships could be used for pavements based on the Austroads Pavement Design Guide (APDG). The MEPDG performance relationships were derived from a very extensive research program and could be further refined to improve their reliability of prediction. The US long term pavement performance (US-LTPP) data used in developing the relationships is not easily estimated or measured, which raises questions of the appropriateness of using these relationships in Australian conditions.
Another issue is the statistical methods used to analyse the US-LTPP data. A lot of the analysis focused on fitting the data by including more independent variables.
- 1 INTRODUCTION
- 1.1 LTPP Background
- 1.2 Scope of this Report
- 2 AASHTO MECHANISTIC-EMPIRICAL PAVEMENT DESIGN GUIDE
- 2.1 Development of Performance Relationships
- 2.1.1 Rutting
- 2.1.2 Fatigue Cracking
- 2.1.3 Roughness Model
- 2.1 Development of Performance Relationships
- 3 DISCUSSION OF THE AASHTO MECHANISTIC-EMPIRICAL PERFORMANCE MODELS
- 3.1 Rutting
- 3.2 Fatigue Cracking
- 3.2.1 Bottom-up Cracking
- 3.2.2 Top-down Cracking
- 3.3 Roughness
- 4 CONCLUSIONS
- 4.1 General
- 4.2 Future Works
- REFERENCES
- APPENDIX A AASHTO PERFORMANCE RELATIONSHIPS