Influence of Mesoscopic Structural Characteristics of Asphalt Mixture on Damage Behavior of Asphalt Pavement
Publication: Journal of Transportation Engineering, Part B: Pavements
Volume 149, Issue 2
Abstract
Mechanical responses and damage behaviors of asphalt pavement are closely associated with the mesostructure characteristics of the asphalt mixture. The aim of this research was to investigate the effect of the different mesostructure characteristics of asphalt mixtures on pavement damage behavior through a multiscale finite-element (FE) analysis method. A two-dimensional (2D) random aggregate generation algorithm was used to construct the mesostructures of asphalt mixtures with different characteristics, including aggregate distribution uniformity, shape, volume fraction, and size range. Bilinear cohesive elements were used to model damage initiation within asphalt pavement. Also, the nonuniformity coefficient (NUC) was applied to evaluate the uniformity of aggregate distribution within asphalt pavement. The results indicated that the NUC could well characterize the uniformity of coarse aggregate distribution in pavement, and the damage initiation zone became larger as the NUC increased. Compared with regular aggregates, irregular shape aggregates led to more damage initiation in asphalt pavement. For regular shape aggregates, the damage initiation zone became smaller as the aggregate shape approached the circle. In addition, the decrease of aggregate size and volume fraction could increase the possibility of “top-down” cracking of pavement.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors gratefully appreciate the support from the National Natural Science Foundation of China (51878122 and 51808098).
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Information & Authors
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Published In
Journal of Transportation Engineering, Part B: Pavements
Volume 149 • Issue 2 • June 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Mar 29, 2022
Accepted: Dec 24, 2022
Published online: Mar 7, 2023
Published in print: Jun 1, 2023
Discussion open until: Aug 7, 2023
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