Comparison of fatigue analysis approaches for predicting fatigue lives of hot-mix asphalt concrete (HMAC) mixtures

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dc.contributorMatin, Epps, Amy
dc.creatorWalubita, Lubinda F.
dc.date.accessioned2006-08-16T19:08:19Z
dc.date.accessioned2017-04-07T19:51:46Z
dc.date.available2006-08-16T19:08:19Z
dc.date.available2017-04-07T19:51:46Z
dc.date.created2003-05
dc.date.issued2006-08-16
dc.description.abstractHot-mix asphalt concrete (HMAC) mixture fatigue characterization constitutes a fundamental component of HMAC pavement structural design and analysis to ensure adequate field fatigue performance. HMAC is a heterogeneous complex composite material of air, binder, and aggregate that behaves in a non-linear elasto-viscoplastic manner, exhibits anisotropic behavior, ages with time, and heals during traffic loading rest periods and changing environmental conditions. Comprehensive HMAC mixture fatigue analysis approaches that take into account this complex nature of HMAC are thus needed to ensure adequate field fatigue performance. In this study, four fatigue analysis approaches; the mechanistic empirical (ME), the calibrated mechanistic with (CMSE) and without (CM) surface energy measurements, and the proposed NCHRP 1-37A 2002 Pavement Design Guide (MEPDG) were comparatively evaluated and utilized to characterize the fatigue resistance of two Texas HMAC mixtures in the laboratory, including investigating the effects of binder oxidative aging. Although the results were comparable, the CMSE/CM approaches exhibited greater flexibility and potential to discretely account for most of the fundamental material properties (including fracture, aging, healing, visco-elasticity, and anisotropy) that affect HMAC pavement fatigue performance. Compared to the other approaches, which are mechanistic-empirically based, the CMSE/CM approaches are based on the fundamental concepts of continuum micromechanics and energy theory.
dc.identifier.urihttp://hdl.handle.net/1969.1/3898
dc.language.isoen_US
dc.publisherTexas A&M University
dc.subjectCMSE
dc.subjectCM
dc.subjectME
dc.subjectMEPDG
dc.subjectFatigue
dc.subjectCracking
dc.subjectAsphalt mixtures
dc.subjectFracture
dc.subjectAging
dc.subjectAnisotropy
dc.subjectVisco-elastic
dc.subjectPseudo strain energy
dc.subjectSurface energy
dc.subjectContinum
dc.subjectMicro-mechanics
dc.subjectHealing
dc.subjectNon-linear
dc.subjectWork potential theory
dc.subjectFracture mechanics
dc.subjectCalibrated mechanistic
dc.titleComparison of fatigue analysis approaches for predicting fatigue lives of hot-mix asphalt concrete (HMAC) mixtures
dc.typeBook
dc.typeThesis

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