Analysis of Performance Decay Behavior for Asphalt Pavement Based on Aging

Abstract:

Aging is a main factor affecting the durability of asphalt pavement. To study decay behavior of asphalt pavement with aging, aged asphalt was extracted from stratified pavement mixtures for different service-life. The changes of asphalt properties with service time and depth variations of the pavement were discussed. And numerical simulation analysis of pavement structure was conducted with pavement gradient modulus changes caused by aging. The results indicate that asphalt stiffness increases and low-temperature performance decays sharply with the extension of pavement service life, especially in the first several years. The vertical aging differences from top to bottom of pavement were significant, the aging extents decrease continuously from the surface, which cause the gradient changes of pavement modulus. The maximum tensile stress and maximum shear stress all increase with surface modulus increasing, so more serious aging can induce greater gradient modulus, shear stress and tensile stress are larger under the same loads, which have more serious damage to the pavement structure.

• Periodical: Advanced Materials Research (Volume 723)
• Pages: 22-26
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.723.22
• Online since: August 2013
• Authors: Pei Long Li, Zhan Ding, Zheng Qi Zhang
• Keywords: Aging, Asphalt Pavement, Gradient Modulus, Mechanical Analysis, Numerical Simulation, Performance Decay Behavior

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