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Title: Statistical Significance of Freeze–Thaw Related Factors on Cumulative Damage to Flexible Pavements
Accession Number: 01333337
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: Although it is widely recognized that trafficking on thaw-weakened pavement structures significantly accelerates pavement failure in seasonal frost areas, contributions of specific freeze season characteristics, such as freeze season length, thaw depth, and depth to water table, are not as readily identified or quantified. To identify statistically significant contributing factors or combinations of factors, computer simulations were conducted with a seasonal mechanistic design and evaluation procedure and 21 years of environmental data from two original flexible pavement test cells at the Minnesota Road Research Project. Statistical analyses were conducted on various winter season characteristics to determine which characteristics or explanatory variables were statistically significant contributors to, or indicators of, cumulative pavement damage. Analyses suggest damage could generally be modeled as a function of one, two, or three explanatory variables. Thaw depth, or a variation thereof, was a significant explanatory variable for at least one regression equation corresponding to each damage model in both test cells evaluated. The combination of the surface freezing season length and corresponding average pavement surface temperature appears significant for fatigue cracking for the two test cells analyzed. Maximum thaw depth and the combination of surface freezing season length and air freezing index appear significant with regard to rutting, according to Asphalt Institute and U.S. Army Corps of Engineers criteria. Several additional characteristics of the winter season have been identified for inclusion in similar analyses to be conducted with the Enhanced Integrated Climatic Model and nine U.S. Department of Agriculture Forest Service–New Hampshire Department of Transportation pavement test sections. Such characteristics, once better defined, could provide useful information for design or evaluation purposes.
Monograph Title: Monograph Accession #: 01356761
Report/Paper Numbers: 11-2259
Language: English
Authors: Kestler, Maureen ABerg, Richard LBigl, Susan RPagination: pp 55-67
Publication Date: 2011
ISBN: 9780309167451
Media Type: Print
Features: Figures
(3)
; References
(17)
; Tables
(9)
TRT Terms: Identifier Terms: Subject Areas: Design; Geotechnology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I26: Water Run-off - Freeze-thaw; I42: Soil Mechanics
Files: TRIS, TRB, ATRI
Created Date: Feb 17 2011 6:07PM
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