Characterization of Microdamage and Healing of Asphalt Concrete Mixtures
Publication: Journal of Materials in Civil Engineering
Volume 14, Issue 6
Abstract
The pseudo-strain concept based on Schapery’s extended nonlinear elastic-viscoelastic correspondence principle is demonstrated by a considerable database to be able to characterize both microdamage and microdamage healing during the damage process. A change in pseudo stiffness can be used to quantify microdamage and healing during the fatigue test. Pseudo stiffness decreases consistently with increasing number of loading cycles, indicating that microdamage occurs during the fatigue test. The significant recovery of pseudo stiffness after rest periods demonstrates a healing effect due to rest periods. Dissipated pseudo-strain energy is a strong and consistent quantifier of damage and healing. High levels of cumulative dissipated pseudo-strain energy are consistent with high levels of fatigue damage, whereas low levels of cumulative pseudo-strain energy are associated with fatigue damage resistance. Pseudo stiffness is the chord slope of the stress-pseudo strain hysteresis loop. Since linear viscoelastic-based time effects are eliminated in this approach, pseudo stiffness and/or pseudo-strain energy are superior indicators of damage than either stiffness or total dissipated strain energy. The effects of rest periods on fatigue life extension due to healing of microcracks are significant. It has been demonstrated that longer rest periods result in more healing, and in turn in greater fatigue life.
Get full access to this article
View all available purchase options and get full access to this article.
References
Asphalt Institute. (1981). Thickness design manual series no. 1 (MS-1). 9th Ed., College Park, Md.
Jacobs, M. M. J., Hopman, P. C., and Molenaar, A. A. A.(1996). “Application of fracture mechanics principles to analyze cracking in asphalt concrete.” Proc., Association of Asphalt Paving Technologists, 65, AA PT, St. Paul, Minn., 1–37.
Kim, Y. S. (1988). “Evaluation of healing and constitutive modeling of asphalt concrete by means of the theory of nonlinear viscoelasticity and damage mechanics.” PhD dissertation, Texas A&M Univ., College Station, Tex.
Kim, Y. R., and Little, D. N. (1989). Evaluation of healing in asphalt concrete by means of the theory of nonlinear viscoelasticity. Transportation Research Record. 1228, Transportation Research Board, Washington, D.C., 198–210.
Kim, Y. R., Little, D. N., and Benson, F. C.(1990). “Chemical and mechanical evaluation of healing mechanism of asphalt concrete.” Proc., Association of Asphalt Paving Technologists, 59, AA PT, St. Paul, Minn., 240–275.
Kim, Y. R., Whitmoyer, S. L., and Little, D. N. (1994). “Healing in asphalt concrete pavements: Is it real?” Transportation Research Record. 1454, Transportation Research Board, Washington, D.C., 89–96.
Little, D. N., Lytton, R. L., Williams, D., and Chen, J. W. (1998). “Fundamental properties of asphalts and modified asphalts.” Final Research Rep., Vol. 1, Texas Transportation Institute, Texas A&M Univ., College Station, Tex.
Little, D. N., Lytton, R. L., Williams, D., and Kim, Y. R. (1997). “Propagation and healing of microcracks in asphalt concrete and their contributions to fatigue.” Asphalt science and technology, A. M. Usmani, ed., Marcel Dekker, New York, 149–195.
Lytton, R. L. (2000). “Characterizing asphalt pavement for performance.” Paper No. 00-2878, Transportation Research Board, National Research Council, Washington, D.C.
Lytton, R. L., Uzan, J., Fernando, E. G., Roque, R., Hiltunen, D., and Stoffels, S. M. (1993). “Development and validation of performance prediction models and specifications for asphalt binders and paving mixtures.” Rep. No. SHRP-A-357, Strategic Highway Research Program, National Research Council, Washington, D.C.
Monismith, C. L., Epps, J. A., and Finn, F. N.(1985). “Improved asphalt mix design.” Proc., Association of Asphalt Paving Technologists, 54, AA PT, St. Paul, Minn., 347–406.
Paris, P., and Erdogan, F. (1963). “A critical analysis of crack propagation laws.” J. Basic Eng., Series D, 85(4).
Schapery, R. A. (1973). “A theory of crack growth in visco-elastic media.” Rep. MM 2764-73-1, Mechanics and Materials Research Center, Texas A&M Univ., College Station, Tex.
Schapery, R. A.(1975). “A theory of crack initiation and growth in visco-elastic media. I: Theoretical development. II: Approximate methods of analysis. III: Analysis of continuous growth.” Int. J. Fract., 11(1), 141–159;
A theory of crack initiation and growth in visco-elastic media. II: Approximate methods of analysis.IBID11(3), 369–388; and
A theory of crack initiation and growth in visco-elastic media. III: Analysis of continuous growth.IBID11(4), 549–562.
Schapery, R. A.(1978). “A method for predicting crack growth in nonhomogeneous visco-elastic media.” Int. J. Fract., 14(3), 293–309.
Schapery, R. A.(1984). “Correspondence principles and a generalized J integral for large deformation and fracture analysis of viscoelastic media.” Int. J. Fract., 25, 195–223.
Shell International Petroleum Company, Ltd. (1978). Shell pavement design manual, London.
Si, Z. (2001). “Characterization of microdamage and healing of asphalt concrete mixtures.” PhD dissertation, Texas A&M Univ., College Station, Tex.
Tayebali, A. A. (1994). “Fatigue response of asphalt-aggregate mixtures.” Rep. A404, SHRP A003A.
Uzan, J. (1997). “Fatigue cracking evaluation.” 76th Annual Meeting of the Transportation Research Board, Washington, D.C.
Information & Authors
Information
Published In
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: May 25, 2001
Accepted: Oct 15, 2001
Published online: Nov 15, 2002
Published in print: Dec 2002
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.