Verification for the Calibrated Permanent Deformation Models for the 2002 Design Guide (With Discussion)

The new design approach adopted in the 2002 Design Guide utilized a mechanistic-empirical pavement design procedure. The 2002 Design Guide provides time series predictions of several major distress types. One such distress mechanism is the permanent deformation (rutting). The Design guide solution predicts the total pavement rut depth, as a function of time, by predicting and summing the individual rutting contributed by all rut susceptible layers (asphalt, granular base, subbase and subgrade). This necessitated that a set of rutting models be implemented in the new design method to reflect the new design procedure. The pavement rutting prediction models included in the Design Guide nationally were calibrated by using actual sections from the Long-Term Pavement Performance (LTPP) database, to reflect the field performance of the flexible pavements. To ensure that the calibrated model is as accurate as possible and that the predicted model trends are as close as possible to what experience, practical knowledge and reasonable engineering judgment of the performance of the asphalt concrete pavements allows; an extensive sensitivity analysis was conducted using a wide variety of salient variables that were felt to have an impact on pavement rutting considered in the Design Guide. This paper contains an in-depth detailed analysis for the entire sensitivity study. In this study, a typical section was run using the 2002 Design Guide software. Different levels for each variable considered were used while keeping the other variables constant. The results of the sensitivity runs and the performance of the section with respect to the variables was found to be very logical and rational. In fact, the mechanistic-empirical design approach appears to provide the user with a much more powerful tool to assess the complex interaction of design parameters to performance than is currently available in any other design methodology in the world.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/70700638
• Authors:
  • El-Basyouny, Mohamed M
  • Witczak, Matthew
  • El-Badawy, Sherif
• Discussers:
  • Timm, David
  • Dongre, Raj
  • Heitzman, Michael
  • Dunning, Robert
• Conference:
  • 2005 Journal of the Association of Asphalt Paving Technologists: From the Proceedings of the Technical Sessions
  • Location: Long Beach CA, United States
  • Date: 2005-3-7 to 2005-3-9
• Publication Date: 2005

Language

• English

Media Info

• Media Type: Print
• Features: CD-ROM; Figures; References; Tables;
• Pagination: pp 601-652
• Serial:
  • Journal of the Association of Asphalt Paving Technologists
  • Volume: 74
  • Publisher: Association of Asphalt Paving Technologists (AAPT)
  • ISSN: 0270-2932
  • Serial URL: https://www.asphalttechnology.org/site_page.cfm?pk_association_webpage_menu=9169&pk_association_webpage=19109

Subject/Index Terms

• TRT Terms: Asphalt concrete pavements; Asphalt content; Bases (Chemistry); Bituminous mixtures; Forecasting; Granular bases; Mechanistic design; Pavement distress; Pavement performance; Rutting; Sensitivity analysis; Subbase (Pavements); Subgrade (Pavements); Variables
• Identifier Terms: LTPP Climatic Database
• Uncontrolled Terms: Design guide; Predictive models
• Subject Areas: Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01020731
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 27 2006 11:07AM