United States Department of Transportation
i
A simple test procedure for evaluating low temperature crack resistance of asphalt concrete : executive summary report.
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2009-03-01
[PDF-43.78 KB]
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Edition:Executive summary report.
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Abstract:Low temperature cracking is one of the major
distress modes in asphalt pavement and is
disastrous to pavement performance and service
life. A poor riding surface leads to an increase in
maintenance and eventual early replacement of
the pavement. Currently, there are two
approaches to characterize the low temperature
thermal cracking potential of asphalt concretes; (1)
mechanistic-empirical analysis (Superpave
Indirect Tensile Creep and Strength Test, IDT)
and performance model and (2) a torture test
(Thermal Stress Restrained Specimen Test,
TSRST). Both methods have been validated with
field performance data and predict the low
temperature cracking potential of asphalt concrete
mixes. However, neither test can be readily used
as a routine test because of the complex test and
analysis procedures for IDT and the costly
specialized equipment, and the difficulty
producing beam specimens for TSRST. A new
simple test procedure is needed to evaluate the
low temperature cracking potential for a single
severe freezing event and thermal fatigue for the
environment and materials commonly used in
Ohio.
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