Fatigue and rutting performance of lime-modified hot-mix asphalt mixtures |
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Authors: | Sangyum Lee Sungho Mun Y. Richard Kim |
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Affiliation: | 1. Road Management Division, Seoul Metropolitan Government, Deoksugung-gil 15, Jung-gu, Seoul 100-110, South Korea;2. School of Civil Engineering, Seoul National University of Science & Technology, 172 Gongreung-2 Dong, Nowon-Gu, Seoul 139-743, South Korea;3. Department of Civil, Construction and Environmental Engineering, Campus Box 7908, North Carolina State University, Raleigh, NC 27695-7908, USA |
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Abstract: | This paper describes the effect of lime on composite hot-mix asphalt (HMA) mixtures of aggregate and asphalt binder evaluated using viscoelastic continuum damage analysis, which is based on predicting the effective stress vs. strain equations and microcrack growth. The performance characteristics evaluated in this study included fatigue cracking and rutting resistance in both moisture-damaged and undamaged states. The test methods used in this evaluation were the dynamic modulus test for stiffness characterization, the direct tension test for fatigue cracking characterization, and the triaxial repeated-load permanent deformation test for rutting characterization. The main contribution of this paper is the demonstration of advanced test methods and models that can be used to evaluate the performance of various mixtures with respect to the fatigue damage and rutting performance. |
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