Data collected on 111 Interstate highway projects in Virginia were analyzed by using a multiregression procedure, and the rating coefficient for each type of distress was determined. From these coefficients, the total distress and the resultant maintenance rating for each pavement were calculated. The types of distress that were found to affect the maintenance rating are longitudinal cracking, alligator cracking, rutting, pushing, raveling, and patching. A method for designing the required thickness of an overlay was developed based on taking the thickness equivalency of an asphalt concrete overlay in Virginia as equal to 0.5 and the overlay thickness as a function of the ratio of the traffic, in terms of the number of 80-kN (18,000-lb (18-kip)) equivalent loads, carried by the pavement before the overlay to the traffic it would carry after the overlay, depending on the durability of the asphalt mix. This design method does not require the use of a deflection-measuring device. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 89-94
  • Monograph Title: Pavement evaluation and overlay design: a symposium and related papers
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00301090
  • Record Type: Publication
  • ISBN: 0309028485
  • Files: TRIS, TRB
  • Created Date: Nov 27 1979 12:00AM