Microstructure morphologies of asphalt binders using atomic force microscopy

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• 作者：Bo Li 李波 ; Jinyu Yang ; Zhanquan Chen…
• 关键词：Key wordspavement materials ; asphalt binder ; microstructure morphologies ; atomic force microscopy ; chemical compositions
• 刊名：Journal of Wuhan University of Technology-Mater. Sci. Ed.
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：31
• 期：6
• 页码：1261-1266
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science, general;
• 出版者：Wuhan University of Technology
• ISSN：1993-0437
• 卷排序：31

文摘

We investigated microstructure morphologies of three asphalts (SK, Karamay, and Esso) used in China using atomic force microscopy (AFM). The topography and phase contrast images were obtained. Topographic profile and three dimensional images were described. Roughnesses of microstructure were calculated. And the chemical compositions of asphalt were tested to explain the microstructural mechanism of the asphalt. The results show that the topography and phase image in atomic force microscopy are appropriate to evaluate the microstructure of the asphalt binder. There are significant differences in microstructural morphologies including bee-like structure, topographic profile, 3D image, and roughness for three asphalts in this study. There are three different phases in microstructure of asphalt binder. The oil source and chemical composition of asphalt, especially asphaltenes content have a great influence on the microstructure.