THRESHOLD PAVEMENT THICKNESS TO SURVIVE SPRING THAW . THIRD INTERNATIONAL CONFERENCE ON BEARING CAPACITY OF ROADS AND AIRFIELDS. PROCEEDINGS, NORWEGIAN INSTITUTE OF TECHNOLOGY, TRONDHEIM, NORWAY, JULY 3-5 1990. VOLUMES 1-2

This article describes research which uses the AASHO Road Test to forecast the threshold pavement thickness likely to survive the spring thaw. Configuration and load were major factors of the AASHO Road Test design of experiment. Two levels of load configuration were used: single and tandem axles. Various levels of load were used for both load configurations. Similarly, thickness was a factor represented by levels of total thicknesses and combination of layer thickness. One type of subgrade was represented at the Road Test. Climate was represented by the site climate at Ottawa, Illinois. In the case of the latter two factors, subgrade and climate, artificial scales were created to represent their effects on pavement performance so that the Road Test results could be extended for application to sites with other subgrades and climates. Traffic was applied at a uniform rate of about twenty-five percent of yearly traffic per season. However, sixty percent of the failures occurred during the spring season. Obviously, the spring thaw event was significant to the performance of the pavements at the Road Test. The traffic was weighted in an attempt to account for the spring thaw event. However, a specific analysis was not conducted to clearly examine the effect on performance. A current reanalysis of the Road Test data has shown the significance of the interaction of traffic and the spring thaw event. Although only two spring thaw events are incorporated in the Road Test results, an analysis has been conducted that shows the probability of a pavement surviving the spring thaw event. Both failures and survivors are incorporated in the analysis. With the analysis, pavement engineers can consider the risk associated with a pavement thickness surviving spring thaw. (Author/TRRL)

  • Availability:
  • Corporate Authors:

    Tapir

    Trondheim University, Gloeshaugen
    Trondheim-NTH,   Norway 
  • Authors:
    • White, T D
    • Coree, B J
  • Publication Date: 1990

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00612244
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • ISBN: 82-519-1033-1
  • Files: ITRD, TRIS
  • Created Date: Aug 31 1991 12:00AM