市政技术2024，Vol.42Issue(1)：212-218,7.DOI:10.19922/j.1009-7767.2024.01.212
基于AFM的SBS改性沥青老化过程力学特性研究
Study on Mechanical Characteristics of SBS Modified Asphalt Aging Process Based on AFM
曲恒辉 1丁昕 2李孟 1田冬军 1冯美军 1王飞 1王鹏2
作者信息
- 1. 山东高速材料技术开发集团有限公司,山东济南 250014
- 2. 山东建筑大学交通工程学院,山东济南 250101
- 折叠
摘要
Abstract
In order to investigate the evolution of macroscopic and microscopic performance of SBS modified asphalt during the aging process,a SBS modified asphalt with 5.5％dosage was prepared and the short-term and long-term aging tests were conducted.The basic performance index was analyzed.The rheological performances were obtained by temperature scanning tests and frequency scanning tests.The micro surface morphology and dissipation force were tested by atomic force microscope(AFM).The adhesion force and Young's modulus before and after aging was analyzed by force curves.The results showed that short-term aging has little impact on the rheological properties of asphalt.Long-term aging has significant effects.Both the elastic modulus and viscosity modulus of asphalt in-creased,showing characteristics of hardening and embrittling;The results from AFM showed that the height of the SBS modified asphalt became larger after aging,and the size and number of the bee-structure increased,the adhe-sive force and dissipation force decreased,and the Young's modulus increased,which confirmed the results of the macro rheological test.关键词
AFM/SBS改性沥青/老化/力学特性Key words
atomic force microscope(AFM)/SBS modified asphalt/aging/mechanical properties分类
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曲恒辉,丁昕,李孟,田冬军,冯美军,王飞,王鹏..基于AFM的SBS改性沥青老化过程力学特性研究[J].市政技术,2024,42(1):212-218,7.
