Campus Units

Civil, Construction and Environmental Engineering

Document Type

Article

Publication Version

Published Version

Publication Date

2014

Journal or Book Title

Journal of Traffic and Transportation Engineering (English Edition)

Volume

1

Issue

5

First Page

362

Last Page

370

DOI

10.1016/S2095-7564(15)30282-8

Abstract

This paper introduces a new method for reconstructing virtual two-dimensional (2-D) microstructure of hot mix asphalt (HMA). Based on the method, the gradation of coarse aggregates and the film thickness of the asphalt binder can be defined by the user. The HMA microstructure then serves as the input to the computational fluid dynamic (CFD) software (ANSYS-FLUENT) to investigate the water flow pattern through it. It is found that the realistic flow fields can be simulated in the 2-D micro-structure and the flow patterns in some typical air void structures can be identified. These flow patterns can be used to explain the mechanism that could result in moisture damage in HMA pavement. The one-dimensional numerical permeability values are also derived from the flow fields of the 2-D HMA microstructure and compared with the measured values obtained by the Karol-Warner permeameter. Because the interconnected air voids channels in actual HMA samples cannot be fully represented in a 2-D model, some poor agreements need to be improved.

Research Focus Area

Structural Engineering, Transportation Engineering

Comments

This article is published as Chen, Can, and R. Christopher Williams. "Water flow simulation and analysis in HMA microstructure." Journal of Traffic and Transportation Engineering (English Edition) 1, no. 5 (2014): 362-370. DOI: 10.1016/S2095-7564(15)30282-8. Posted with permission.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.

Copyright Owner

Periodical Offices of Chang’an University

Language

en

File Format

application/pdf

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