To elucidate the mechanism by which asphalt viscoelastic properties affect pavement deformation under high-temperature conditions, this study investigated AH-70 asphalt pavements with AC-13 and AC-20 structures. Viscoelastic parameters were obtained through dynamic modulus tests at multiple temperatures, as well as creep and relaxation experiments. These parameters were combined with laboratory rutting tests and fiber Bragg grating (FBG)–based layered monitoring to analyze the accumulation of deformation and the evolution of rutting in different structural layers under elevated temperatures. The results indicate that high temperatures lead to a pronounced reduction in dynamic modulus and an increase in phase angle, reflecting a decline in elastic stiffness and an enhancement of viscous flow behavior. Under extreme high-temperature conditions, the deformation contribution of the middle and lower layers increases significantly. The degradation of viscoelastic properties at high temperatures is identified as the primary factor driving the downward extension and accelerated development of rutting from the surface layer into deeper layers. The findings provide a theoretical basis for pavement design and maintenance in high-temperature regions.

Meng Jiayi. Influence of Asphalt Viscoelastic Properties on Pavement Deformation under High-Temperature Conditions. Academic Journal of Engineering and Technology Science (2026), Vol. 9, Issue 1: 93-97. https://doi.org/10.25236/AJETS.2026.090112.

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