Fracture Properties of Viscoelastic Asphalt Mixture at Different Temperatures Based on the SCB Test
Publication: International Conference on Road and Airfield Pavement Technology 2023
ABSTRACT
Cohesive zone model (CZM) has gained considerable attention to investigate the fracture mechanism of asphalt mixture. The parameters of CZM in finite element (FE) model could be validated according to the semicircular bending test (SCB) results. The fracture energy and strength of asphalt mixture would be obtained based on the CZM parameters after validation. As a temperature sensitive material, the influence of temperature on the fracture properties of asphalt mixture needs to be investigated. In this study, the viscoelastic mechanic parameters of AC-13 asphalt mixture were tested through uniaxial compression test. Then the SCB tests were conducted at the temperature of 15℃, 25℃, and 35℃. The bilinear CZM parameters as well as the fracture energy and strength at different temperature were determined through an optimization approach with high efficiency. The results showed that the strength of asphalt mixture decreases with the increase of temperature, then the decrease of strength reduce its fracture energy.
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Information
Published In
International Conference on Road and Airfield Pavement Technology 2023
Pages: 628 - 643
History
Published online: Feb 6, 2024
ASCE Technical Topics:
- Continuum mechanics
- Cracking
- Engineering fundamentals
- Engineering mechanics
- Finite element method
- Fracture mechanics
- Material mechanics
- Material properties
- Materials characterization
- Materials engineering
- Mathematics
- Measurement (by type)
- Methodology (by type)
- Mixtures
- Numerical methods
- Parameters (statistics)
- Rheology
- Solid mechanics
- Statistics
- Strength of materials
- Temperature effects
- Temperature measurement
- Viscoelasticity
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