An alternative approach for characterization of the linear viscoelastic behavior of asphalt binders

作者：Zeiada, Waleed; Liu, Hanqi^*; Ezzat, Helal; Al-Khateeb, Ghazi G.; Zhang, Derun; Shanableh, Abdallah

来源：Road Materials and Pavement Design, 2023.

DOI：10.1080/14680629.2023.2292562

• Asphalt binder
• master curve
• dynamic shear modulus
• phase angle
• Carreau-Yasuda model
• rheogram

This study aimed to develop an alternative approach to characterise the linear viscoelastic behaviour of asphalt binders. A rheogram model was firstly proposed based on the Carreau-Yasuda model; its accuracy was substantiated by high R-2 values. The dynamic shear modulus master curve model was then obtained using the relationship between the magnitude of complex viscosity and dynamic shear modulus and the two definitions of the time-temperature shift factor. Afterwards, the phase angle master curve model was derived according to the approximate Kramers-Kronig relation. The proposed approach was demonstrated to be capable of accurately characterising the linear viscoelastic behaviour of selected asphalt binders. In addition, the predicted zero shear viscosity (ZSV) could be potentially employed to evaluate the asphalt binder rutting resistance. Compared with the widely-used Christensen-Anderson-Marasteanu (CAM) model, the developed master curves models were better at constructing the phase angle master curves of selected asphalt binders.

• 单位
  华中科技大学