Characterization of Bitumen Micro-Mechanical Behaviors Using AFM, Phase Dynamics Theory and MD Simulation

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dc.contributor.authorHou, Yueen
dc.contributor.authorWang, Linbingen
dc.contributor.authorWang, Daweien
dc.contributor.authorGuo, Mengen
dc.contributor.authorLiu, Pengfeien
dc.contributor.authorYu, Jianxinen
dc.contributor.departmentCivil and Environmental Engineeringen
dc.date.accessioned2017-09-20T18:30:00Zen
dc.date.available2017-09-20T18:30:00Zen
dc.date.issued2017-02-21en
dc.date.updated2017-09-20T18:30:00Zen
dc.description.abstractFundamental understanding of micro-mechanical behaviors in bitumen, including phase separation, micro-friction, micro-abrasion, etc., can help the pavement engineers better understand the bitumen mechanical performances at macroscale. Recent researches show that the microstructure evolution in bitumen will directly affect its surface structure and micro-mechanical performance. In this study, the bitumen microstructure and micro-mechanical behaviors are studied using Atomic Force Microscopy (AFM) experiments, Phase Dynamics Theory and Molecular Dynamics (MD) Simulation. The AFM experiment results show that different phase-structure will occur at the surface of the bitumen samples under certain thermodynamic conditions at microscale. The phenomenon can be explained using the phase dynamics theory, where the effects of stability parameter and temperature on bitumen microstructure and micro-mechanical behavior are studied combined with MD Simulation. Simulation results show that the saturates phase, in contrast to the naphthene aromatics phase, plays a major role in bitumen micro-mechanical behavior. A high stress zone occurs at the interface between the saturates phase and the naphthene aromatics phase, which may form discontinuities that further affect the bitumen frictional performance.en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationHou, Y.; Wang, L.; Wang, D.; Guo, M.; Liu, P.; Yu, J. Characterization of Bitumen Micro-Mechanical Behaviors Using AFM, Phase Dynamics Theory and MD Simulation. Materials 2017, 10, 208.en
dc.identifier.doihttps://doi.org/10.3390/ma10020208en
dc.identifier.urihttp://hdl.handle.net/10919/79312en
dc.language.isoenen
dc.publisherMDPIen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectAtomic Force Microscopyen
dc.subjectbitumenen
dc.subjectmicro-mechanical behaviorsen
dc.subjectPhase Dynamics Theoryen
dc.subjectMD simulationen
dc.titleCharacterization of Bitumen Micro-Mechanical Behaviors Using AFM, Phase Dynamics Theory and MD Simulationen
dc.title.serialMaterialsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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