Evolution of the Crossover Modulus with Oxidative Aging: Method to Estimate Change in Viscoelastic Properties of Asphalt Binder with Time and Depth on the Road

This study is based on recovered binders from a hot-mix asphalt comparative test site constructed in Arizona in 2001 with mix collected during construction and cores collected in 2005 and 2010. The intent of the study is to evaluate the potential of using the evolution of the binder crossover modulu...

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Bibliographic Details
Published in:Transportation research record 2013-01, Vol.2370 (1), p.76-83
Main Authors: Farrar, Michael J., Turner, Thomas F., Planche, Jean-Pascal, Schabron, John F., Harnsberger, P. Michael
Format: Article
Language:English
Subjects:
Asphalt
Binders
Construction
Crossovers
Mathematical models
Pavements
Roads
Viscoelasticity
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Summary:This study is based on recovered binders from a hot-mix asphalt comparative test site constructed in Arizona in 2001 with mix collected during construction and cores collected in 2005 and 2010. The intent of the study is to evaluate the potential of using the evolution of the binder crossover modulus with time and depth in the pavement to determine the change in linear viscoelastic properties of the binder during the life of the pavement. The crossover modulus is one of three parameters in the Christensen–Anderson (CA) complex shear modulus model. The CA model is used in this study to develop complex modulus and phase angle master curves of the binder as a function of field time, depth, and temperature. The master curves generated demonstrate the change in SHRP specification parameters, such as m-value and creep stiffness, as well as in the mix dynamic modulus with time and depth on the road. In addition, although asphalt dependent, a linear relationship between oxygen uptake and the log of the crossover modulus is reported.
ISSN:0361-1981
2169-4052
DOI:10.3141/2370-10