United States Department of Transportation
i
Field Performance of Asphalt Pavements at Low and Intermediate Temperatures [Research Brief]
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2022-07-01
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[PDF-512.22 KB]
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Abstract:This research evaluates selected asphalt mixtures for low-temperature cracking and intermediate temperature fracture energy to ensure that the addition of a low-temperature test will not affect the high temperature performance or the durability of pavements. Asphalt mixtures were collected at seven different plants from the slats after mixing and at laydown from the windrow. The mixtures were considered representative of the material produced in the state of Utah. The mixtures were compacted in three different labs and tested at low and intermediate temperatures using the bending beam rheometer (AASHTO TP125-16) and the semi-circular bend test configuration (AASHTO TP124-16). The creep modulus and relaxation capacity were determined at low temperatures and the flexibility index was measured at intermediate temperatures. Both tests provided insight as to the potential performance of the mixtures.
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