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Publication Details

Seasonal Variations in the Moduli of Unbound Pavement Layers

Research/Reference: useful for researchers doing further work in the pavement area as well as those developing improved testing and design procedures. Includes documents of historical value.

Primary Topic: Surface and Other Considerations

Description: The in situ moduli of unbound pavement materials vary on a seasonal basis as a function of temperature and moisture conditions. Knowledge of these variations is required for accurate prediction of pavement life for pavement design and other pavement management activities. The primary objective of this study is to advance the rational estimation of seasonal variations in backcalculated pavement layer moduli using data collected via the Seasonal Monitoring Program of the Long-Term Pavement Performance Program. Principal components of this endeavor included: evaluation of the moisture predictive capabilities of the Enhanced Integrated Climatic Model (EICM); development of empirical models to predict backcalculated pavement layer moduli as a function of moisture content, stress state, and other explanatory variables; and trial application of the models developed to predict backcalculated moduli for unbound pavement layers.

FHWA Publication Number: FHWA-HRT-04-079

Publication Year: 2006

Document Links: HTML  PDF (file size: 3 mb)

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Updated: 02/20/2015

United States Department of Transportation - Federal Highway Administration