Damage evolution of asphalt mixture under freeze-thaw cyclic loading from a mechanical perspective

摘要

This study aims to understand the damage evolution of water-saturated asphalt mixture under freeze-thaw cyclic loading from the perspective of continuum damage mechanics (CDM). The connective void content of three types of asphalt mixtures was employed to characterize the damage to the corresponding asphalt mixture sample under freeze-thaw cyclic loading. The variation of connective void content revealed the nonlinear characteristics of asphalt mixture damage accumulation. A CDM-based model was built to describe the damage evolution law of asphalt mixture. The results predicted by this model agreed with the experimental data, validating its feasibility.