UNCERTAINTY AND APPROPRIATE USE OF CBR DESIGN FOR AIRFIELDS

The performance of recent pavement test sections instigated a review of the origin and use of the California bearing ratio (CBR) airfield pavement design procedure. The study involved inspection of the uncertainty associated with design solutions, given the uncertainty in the empirical equation itself. Variability in design thickness solutions, as produced by uncertainty in criteria, is reasonable. Variability is largest for relatively thin structures and/or those that are subjected to relatively high repetitions. Use of the CBR design equation for predicting remaining pavement life, given a pavement structure and traffic characteristics, leads to much higher uncertainty. The CBR equation evolved from research aimed at producing a thickness design tool and was not specifically developed for the purpose of evaluating pavements. It is best used for the purpose for which it was originally intended.

• Supplemental Notes:
  • Full conference proceedings available on CD-ROM.
• Corporate Authors:

  International Society for Asphalt Pavements

  400 Selby Avenue, Suite 1
  St. Paul, MN  United States  55102
• Authors:
  • Freeman, R B
  • Gonzales, C R
  • Lynch, L N
  • Alexander, D R
• Conference:
  • Ninth International Conference on Asphalt Pavements
  • Location: Copenhagen, Denmark
  • Date: 2002-8-17 to 2002-8-22
• Publication Date: 2002-8

Language

• English

Media Info

• Pagination: 16p

Subject/Index Terms

• TRT Terms: Airports; Bearing capacity; California bearing ratio; Empirical methods; Inspection; Life expectancy; Load factor; Pavement design; Pavement performance; Thickness; Traffic characteristics; Uncertainty
• Subject Areas: Aviation; Design; Highways; Operations and Traffic Management; Pavements; Society; Terminals and Facilities; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00936460
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 31 2003 12:00AM