A Proposal to Characterize the Angular Speed and Acceleration of the Torsional Recovery of a Polymer-Modified Asphalt Binder Incorporating Synthetic Wax

作者：Jamshidi Ali^*; Hamzah Meor Othman; Hosseinpour Mehdi

来源：Journal of Testing and Evaluation, 2016, 44(4): 20140364.

DOI：10.1520/JTE20140364

• warm mixture asphalt
• torsional recovery
• rheology

The objective of this study is to propose a simple methodology based on the Newtonian mechanics or classic kinematic laws for the characterization of the average torsional recovery speed (omega) and the torsional recovery acceleration (omega) of a polymer-modified asphalt binder incorporating a type of synthetic wax as a warm mix additive. The correlation of the rheological properties of the modified binder in terms of the torsional recovery (T-R), along with the engineering properties of prepared warm mixture asphalt in terms of resilient modulus (M-R) and indirect tensile strength (ITS), were evaluated. The results indicated that T-R, omega, and omega of the asphalt binders increase as the synthetic wax content increases. The results also indicated that T-R, omega, and omega have strong correlations with rutting factor (Gsin delta), non-recoverable creep compliance (J(nr)), and recovery percentage (R) of the asphalt. Moreover, there is a significant relationship between the parameters of T-R, omega, and omega and the engineering properties of the mixture samples, irrespective of the construction temperatures.

• 出版日期2016-7