Characterization of Bitumen Micro-Mechanical Behaviors Using AFM, Phase Dynamics Theory and MD Simulation
Fundamental 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 bitum...
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doaj-242e4d9a8455410b8d989520b5bf75032020-11-25T00:24:12ZengMDPI AGMaterials1996-19442017-02-0110220810.3390/ma10020208ma10020208Characterization of Bitumen Micro-Mechanical Behaviors Using AFM, Phase Dynamics Theory and MD SimulationYue Hou0Linbing Wang1Dawei Wang2Meng Guo3Pengfei Liu4Jianxin Yu5National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, ChinaJoint USTB-Virginia Tech Lab on Multifunctional Materials, USTB, Beijing, Virginia Tech, Blacksburg, VA 24061, USAInstitute of Highway Engineering, RWTH Aachen University, Mies-van-der-Rohe-Street 1, D52074 Aachen, GermanyNational Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, ChinaInstitute of Highway Engineering, RWTH Aachen University, Mies-van-der-Rohe-Street 1, D52074 Aachen, GermanyCenter of Analysis and Measurement, Harbin Institute of Technology, Harbin 150001, ChinaFundamental 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.http://www.mdpi.com/1996-1944/10/2/208Atomic Force Microscopybitumenmicro-mechanical behaviorsPhase Dynamics TheoryMD simulation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yue Hou Linbing Wang Dawei Wang Meng Guo Pengfei Liu Jianxin Yu |
spellingShingle |
Yue Hou Linbing Wang Dawei Wang Meng Guo Pengfei Liu Jianxin Yu Characterization of Bitumen Micro-Mechanical Behaviors Using AFM, Phase Dynamics Theory and MD Simulation Materials Atomic Force Microscopy bitumen micro-mechanical behaviors Phase Dynamics Theory MD simulation |
author_facet |
Yue Hou Linbing Wang Dawei Wang Meng Guo Pengfei Liu Jianxin Yu |
author_sort |
Yue Hou |
title |
Characterization of Bitumen Micro-Mechanical Behaviors Using AFM, Phase Dynamics Theory and MD Simulation |
title_short |
Characterization of Bitumen Micro-Mechanical Behaviors Using AFM, Phase Dynamics Theory and MD Simulation |
title_full |
Characterization of Bitumen Micro-Mechanical Behaviors Using AFM, Phase Dynamics Theory and MD Simulation |
title_fullStr |
Characterization of Bitumen Micro-Mechanical Behaviors Using AFM, Phase Dynamics Theory and MD Simulation |
title_full_unstemmed |
Characterization of Bitumen Micro-Mechanical Behaviors Using AFM, Phase Dynamics Theory and MD Simulation |
title_sort |
characterization of bitumen micro-mechanical behaviors using afm, phase dynamics theory and md simulation |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2017-02-01 |
description |
Fundamental 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. |
topic |
Atomic Force Microscopy bitumen micro-mechanical behaviors Phase Dynamics Theory MD simulation |
url |
http://www.mdpi.com/1996-1944/10/2/208 |
work_keys_str_mv |
AT yuehou characterizationofbitumenmicromechanicalbehaviorsusingafmphasedynamicstheoryandmdsimulation AT linbingwang characterizationofbitumenmicromechanicalbehaviorsusingafmphasedynamicstheoryandmdsimulation AT daweiwang characterizationofbitumenmicromechanicalbehaviorsusingafmphasedynamicstheoryandmdsimulation AT mengguo characterizationofbitumenmicromechanicalbehaviorsusingafmphasedynamicstheoryandmdsimulation AT pengfeiliu characterizationofbitumenmicromechanicalbehaviorsusingafmphasedynamicstheoryandmdsimulation AT jianxinyu characterizationofbitumenmicromechanicalbehaviorsusingafmphasedynamicstheoryandmdsimulation |
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1725353382826213376 |