Forensic Investigation of a Rich-Bottom Pavement

Rich-bottom pavements are designed to increase fatigue resistance at the bottom of an HMA pavement structure through adding an additional 0.5% of asphalt binder to the mixture, thus reducing the amount of air voids in the pavement. While this is the theoretical case, section N8 at the National Center for Asphalt Technology (NCAT) Test Track, a rich-bottom pavement, exhibited excessive amounts of fatigue cracking despite the additional asphalt. A dynamic strain analysis, physical trench analysis, and a bond strength analysis were conducted in order to determine if the rich-bottom might have been the cause of the accelerated damage.


  • English

Media Info

  • Media Type: Web
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 69p

Subject/Index Terms

Filing Info

  • Accession Number: 01090196
  • Record Type: Publication
  • Report/Paper Numbers: NCAT Report 06-04
  • Files: TRIS
  • Created Date: Mar 11 2008 2:34PM