This report describes the field data and analysis techniques used to evaluate the effect of winter ground freezing on WSDOT pavement structures during two thaw periods. Six field test sites were selected in District 2 for deflection testing and in situ instrumentation as well as materials sampling.
The results show that a principal mechanism which necessitates load restrictions for some of the WSDOT pavement structures is the weakened condition of the base course during thawing periods. Presented in the report is a single revised load restriction table and a criterion to use in determining the time that load restrictions should be established.
June 24, 2007
Jo A. Lary, Joe P. Mahoney, Jatinder Sharma.
Washington State Transportation Center (TRAC)
- # of Pages: 357 p., 16,674 KB (PDF)
- Subject: Base course (Pavements), Bearing capacity, Deflection, Evaluation, Field tests, Freeze thaw durability, Frost susceptibility, Load limits, Pavements, Seasons.
- Keywords: Regulation, tire, axle, load restriction, frost, thaw, seasonal variation, deflection testing.
- Related Publications: A Research Summary Report: The Evaluation of Frost Related Effects on Pavements, (WA-RD 67.2).
This abstract was last modified April 29, 2008