The Thermo-Rheological Behavior of Bitumen

As a very important coating ‎material in different applications, ‎bitumen is a complex mixture of ‎different chemicals. It is generally ‎accepted that the principle of time-‎temperature superposition (TTS) ‎holds for this material. In this ‎study rheological measurements ‎were carried out on four different ‎bitumens. Different ‎representations of the ‎experimental data were examined ‎to check failure or holding of TTS ‎for this complex system. Due to ‎differences in dynamics of ‎components, discontinuities were ‎observed in ‎ versus G* curves ‎for all four bitumens. It was ‎concluded that the TTS fails to be ‎applied for the studied bitumens. ‎