Laboratory Testing and MEPDG Performance Predictions of Perpetual Pavements

Because of their long structural life, many US States are exploring the use of perpetual pavements on some of their major highways. A perpetual pavement is a thick asphalt pavement structure with a structural life in excess of 50 years, often designed for heavily trafficked highways. Perpetual pavements are rut-and fatigue-resistant pavement structures with no major structural maintenance and/or rehabilitation exercises required; but are subject to periodic surface maintenance and/or renewals during their service life. The objective of this paper is to present as a case study the laboratory and computational performance predictions of Texas perpetual pavement structures; with a focus on the rut-resistant and fatigue-resistant layers. Laboratory testing was achieved with the Hamburg Wheel Tracking (HWTT) device and the Overlay Tester (OT) for rutting and cracking resistance, respectively. The MEPDG Version 0.910 was used for computational analyses and performance predictions. For the pavement structures evaluated, data analyses generally exhibited a good correlationship between laboratory and MEPDG performance predictions. Both laboratory and MEPDG analyses predicted no occurrence of bottom-up fatigue cracking but indicated potential for permanent deformation in the top layers. While perpetual pavement structures are designed to be rut- and fatigue-resistant, the MEPDG analyses indicated that proper account should also be taken of other potential distresses such as surface roughness, top-down cracking, and thermal fracture through among other measures; appropriate materials selection and mix-designs. Overall, the MEPDG results indicated that at least one surface treatment would be required within the first 23 years of service.

Language

  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; Photos; References; Tables;
  • Pagination: 16p
  • Monograph Title: TRB 86th Annual Meeting Compendium of Papers CD-ROM

Subject/Index Terms

Filing Info

  • Accession Number: 01046062
  • Record Type: Publication
  • Report/Paper Numbers: 07-3370
  • Files: TRIS, TRB
  • Created Date: Feb 8 2007 8:03PM