Asphalt complex modulus and phase angle by equilibrium molecular dynamics
Document Type
Conference Proceeding
Date of Original Version
1-1-2020
Abstract
Relating changes in asphalt mechanics to asphalt chemistry would be useful for understanding pavement performance. Towards that end, stress relaxation modulus from prior molecular dynamics simulations of a model asphalt was converted to complex modulus, and random noise was decreased with tools from signal processing. Time-temperature superposition was found for magnitude of complex modulus over 400 to 533 K, while phase angle showed less good superposition. Time shift factors were in a similar range to those from rotation rates of individual molecules. Trends were described by the CAM asphalt rheology model.
Publication Title, e.g., Journal
Advances in Materials and Pavement Performance Prediction II Contributions to the 2nd International Conference on Advances in Materials and Pavement Performance Prediction Am3p 2020
Citation/Publisher Attribution
Masoori, M., and M. L. Greenfield. "Asphalt complex modulus and phase angle by equilibrium molecular dynamics." Advances in Materials and Pavement Performance Prediction II Contributions to the 2nd International Conference on Advances in Materials and Pavement Performance Prediction Am3p 2020 (2020). doi: 10.1201/9781003027362-106.