Chapter
Apr 26, 2012
Stress Concentration Factor as a Performance Indicator for Asphalt Mixes
Authors: Linbing Wang, Yongping Wang, Qingbin Li, and Gerardo FlintschAuthor Affiliations
Publication: Analysis of Asphalt Pavement Materials and Systems: Engineering Methods
Abstract
This paper presents some recent developments in using Finite Element Method (FEM) and the 3D microstructure of asphalt concrete reconstructed from x-ray tomography imaging to evaluate its performance. Asphalt concrete is modeled as a material composed of an effective solid and void. The stress concentration factor and its distributions are computed and correlated to the overall resistance of the mixtures against rutting and fatigue, and the internal structural quantities. The correlation of the stress concentration factor with the field performance of the WesTrack mixes indicates that mixes with large stress concentration factors, as expected, may be more prone to rutting and fatigue cracking than those with smaller stress concentration factors.
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Published In
Analysis of Asphalt Pavement Materials and Systems: Engineering Methods
Pages: 1 - 13
Copyright
© 2007 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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ASCE Technical Topics:
- Asphalt concrete
- Chemical processes
- Chemistry
- Composite materials
- Computer vision and image processing
- Engineering fundamentals
- Engineering materials (by type)
- Environmental engineering
- Fatigue (material)
- Fiber reinforced composites
- Finite element method
- Gravels
- Infrastructure
- Material mechanics
- Material properties
- Materials characterization
- Materials engineering
- Methodology (by type)
- Microstructure
- Numerical methods
- Pavement condition
- Pavement rutting
- Pavements
- Radiation
- Radiography
- Transportation engineering
- X rays
Authors
Affiliations
Linbing Wang
P.E.
M.ASCE
Associate Professor, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA 24061
Yongping Wang
Graduate Research Assistant, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA 24061
Qingbin Li
Professor, Institute of Hydraulic Structures, Department of Hydraulic Engineering, Tsinghua University Beijing, 100084, P.R. China
Gerardo Flintsch
Associate Professor, Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA
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