期刊
MATERIALS
卷 10, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/ma10020208
关键词
Atomic Force Microscopy; bitumen; micro-mechanical behaviors; Phase Dynamics Theory; MD simulation
类别
资金
- State Key Laboratory of Disaster Reduction in Civil Engineering [SLDRCE15-03]
- Ministry of Education of the People's Republic of China
- National Natural Science Foundation of China [51308042]
- Fundamental Research Funds for the Central Universities [06500036]
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据