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Permanent deformation of asphaltic concrete depends on temperature, rate of loading and state of stress and
significantly increases above 40 oC. The deformation behavior of finer to coarser hot-mix asphalt (HMA) mixtures
was investigated in the laboratory by varying stress level from 100 to 500 kPa at 40 oC & 55 oC. Uniaxial repeated
creep and wheel tracker tests were carried out at the specified conditions and the results were correlated to seek
relationships between test methods. Subsequently, shift factors and a correlation between the test methods are
proposed to guide pavement engineers in the selection of rut resistant mixtures in future. The results show that
intercept coefficients vary in a narrow range and an average shift of 0.48 makes both the tests data on a straight
line. Uniaxial repeated load strain test do not show a clear ranking of the mixtures at the specified temperatures and
the stress conditions. The slope of linear relationship between the tests reduces with an increase in temperature and
stress level.
Imran Hafeez, Mumtaz Ahmed Kamal, Muhammad Waseem Mirza. (2010) Evaluation of Rutting in HMA Mixtures Using Uniaxial Repeated Creep & Wheel Tracker Tests, Pakistan Journal of Engineering and Applied Sciences, Volume 7, Issue 1.
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