Multiscale Damage and Failure Behavior of Drainage Asphalt Mixture Under Multifactor
Xiong Tao, Tao Bai, Jianwei Fan, Haiwei Shen, Hao Cheng
TL;DR
This study explores how drainage asphalt mixtures break down under various stresses using multiple scales of analysis.
Contribution
The paper introduces a multiscale approach combining macro, meso, and micro simulations to analyze asphalt mixture failure.
Findings
Fatigue models based on indirect tensile modulus curves are effective for different asphalt mixtures.
Hydrodynamic pressure above 0.3 MPa significantly promotes damage and crack growth.
Van der Waals forces dominate interface adhesion, while acidic/alkaline aggregates reduce it via hydrogen bonding with water.
Abstract
Macroscopic fatigue tests, mesoscopic finite element simulations, and microscopic molecular dynamics simulations were composed to study the damage and failure of drainage asphalt mixtures in multiscale. The applicability of the fatigue models fit by strain, stress, and the linear fitting slope of the indirect tensile modulus curves were compared. The mesoscopic damage and failure distribution and evolution characteristics were studied, considering the single or coupling effect of traffic loading, hydrodynamic pressure, mortar aging, and interfacial attenuation. The microscopic molecular mechanism of the interface adhesion failure between the aggregate and mortar under water-containing conditions was analyzed. Results show that the fatigue model based on the linear fitting slopes of the indirect tensile modulus curves has significant applicability for drainage asphalt mixtures with…
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Taxonomy
TopicsAsphalt Pavement Performance Evaluation · Numerical methods in engineering · Soil and Unsaturated Flow