Evaluation of Prediction Models of Fatigue for Asphalt Mixes

Ahmad Abu Abdo ； S. J. Jung

《International Journal of Pavement Research and Technology》 6卷6期 (2013/10) Pp. 696-703

https://doi.org/10.6135/ijprt.org.tw/2013.6(6).696

並列摘要

To enhance the understanding of fatigue testing of asphalt mixes, especially at design stage, this study was initiated to investigate the possibility of evaluating fatigue life of asphalt mixes using simple fracture tests (i.e. Semi-Circular Notched Bending (SCNB) Test). Results have shown that a viable correlation exists between parameters determined by monotonic and cyclic SCNB, and based on these results three models were developed using statistical analysis. It was illustrated that monotonic strain energy had better prediction of fatigue life of asphalt mixes than other parameters. Furthermore, sensitivity analysis was carried out to evaluate these models. Tornado plots and extreme tail analyses showed that the strain energy parameter had the most contribution to fatigue life predictions among evaluated parameters. Finally, these models were developed not to replace traditional tests of fatigue life assessment, but to serve as a screening tool and help eliminate weak mixes before conducting more sophisticated and time consuming tests. Thus, pavement mix fatigue life of various mixes could be compared without the use of expensive and time consuming fatigue testing.

並列關鍵字

Extreme tail analysis ； Fatigue test ； Hot mix asphalt ； Sensitivity analysis ； Strain energy ； Tornado plot

參考文獻

Bayomy, F., Abu Abdo, A., Mull, M.A., and Santi, M. (2007). Evaluation of Fracture Resistance of Hot-Mix Asphalt. Proceeding of the International Conference on Advanced Characterization of Pavement and Soil Engineering Materials (Athens-'07), Greece, pp. 1231-1240.

Lee, H.J., Daniel, J.S., and Kim, Y.R. (2000). Continuum Damage Mechanics-Based Fatigue Model of Asphalt Concrete. Journal of Materials in Civil Engineering, 12 (2), pp. 105-112.

Chehab, G.R. (2002). Characterization of asphalt concrete in tension using a viscoelastoplastic model. Ph.D. dissertation, North Carolina State University, Raleigh, NC, USA.

Schapery, R. A. (1990). A theory of Mechanical Behavior of Elastic Media with Growing Damage and Other Changes in Structure. Journal of the mechanics and physics of solids, 38,pp. 215-253.

Lundstrom, R. and Isacsson, U. (2003). Characterization of Asphalt Concrete Deterioration Using Monotonic and Cyclic Tests. International Journal of Pavement Engineering, 4 (3), pp. 143-153.