STRUCTURALLY SOUND : TAKING A PAGE FROM STRUCTURAL ENGINEERS, THE ASPHALT INDUSTRY AIMS TO REDUCE THE STRAIN

This article looks at the introduction of stress load analysis to asphalt paving design and application. The author gives a history of AASHTO guidelines for pavement and subsequent innovations on that design. Paramount is the discussion of appropriate pavement thickness and new software models to help determine that metric. The article discusses how mechanistic analysis can be effectively used as a design strategy for achieving an appropriate pavement thickness for long-lasting asphalt roads. Mechanistic analysis involves the calculation of stresses and strains in the pavement structure, with focus on limiting the stresses and strains to the point where bottom-up fatigue cracking and deep structural rutting do not occur. The article also focuses on the application of PerRoad, a design software for perpetual pavement which uses mechanistic analysis to establish whether a pavement design can be considered perpetual. It takes into account the same limiting strain criteria while also allowing for all traffic loads, seasonal changes in material properties, and variability in materials and layer thicknesses to be considered.

  • Availability:
  • Supplemental Notes:
    • Page range: pp 28, 30-31
  • Corporate Authors:

    Scranton Gillette Communications

    380 E Northwest Highway, Suite 200
    Des Planes, IL  United States  60016-2282
  • Authors:
    • Newcomb, D
  • Publication Date: 2005-6

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01005337
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Files: BTRIS, TRIS
  • Created Date: Oct 14 2005 8:29AM