United States Department of Transportation
i
Effects of Temperature Segregation on the Volumetric and Mechanistic Properties of Asphalt Mixtures [Tech Summary]
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2019-05-01
[PDF-191.79 KB]
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Abstract:Segregation in asphalt mixtures can be described as a concentration of coarse materials in some areas and fine materials in others, which results in non-uniform mixes that do not duplicate the original design, grading, or asphalt cement. Temperature segregation (TS) is a recently found phenomenon of non-uniform distribution of temperatures across the uncompacted asphalt mat during the construction thanks to the popular use of high-precision portable infrared thermal cameras in the paving sites. While many researchers have reported correlations between the TS and the performance of pavements, many others did not. The lack of agreement on the influence of TS to pavement quality and performance could have resulted from inconsistent definition of temperature segregation and dissimilar ranges of asphalt mat temperatures investigated by different researchers.
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