Journal of the Korean Asphalt InstituteISSN:2234-0785(Print) 2635-9553(Online)한국아스팔트학회

Low temperature cracking represents one of the crucial distresses in asphalt pavements. When temperature drops, thermal stress develops in restricted pavement layer then cracking occurs when it reaches at critical temperature level. Due to this reason, thermal stress is recognized as a crucial pavement performance parameter in many pavement agencies in U.S. and Canada. To compute thermal stress, low temperature creep testing is required. After the laboratory work is done, the experimentally computed creep compliance needs to be converted into relaxation modulus then thermal stress can be generated. In this paper, two simple computation approaches for computing relaxation modulus of asphalt mixture from its experimental creep compliance results were introduced. The computation results were compared to the relaxation modulus data computed by the conventional but sophisticated Hopkins and Hamming’s algorithm. It was found that the newly introduced simple inter-conversion approaches provide reliable and reasonable computation results compared to use of the conventional approach.