交通运输研究2024，Vol.10Issue(1)：58-69,12.DOI:10.16503/j.cnki.2095-9931.2024.01.007
沥青老化前后宏-微观性能相关性
Correlation Between Macro-Micro Properties of Asphalt Before and after Aging
郭猛 1何舒欣 1龚演 2严二虎 2梁美琛1
作者信息
- 1. 北京工业大学 桥梁工程安全与韧性全国重点实验室,北京 100124||北京工业大学城市与工程安全减灾教育部重点实验室,北京 100124
- 2. 交通运输部公路科学研究院,北京 100088
- 折叠
摘要
Abstract
This study aimed to elucidate the inherent influence mechanism of microstructural changes on the macroscopic mechanical properties of asphalt during its aging process.By combining rheological pa-rameters obtained from a dynamic shear rheometer and chemical functional groups and microstructure data analyzed by infrared spectroscopy and fluorescence microscopy,the macro-micro correlations in both ma-trix and SBS modified asphalts at various stages of aging were unveiled.The findings reveal that the micro-spatial network structure characteristic of SBS modified asphalt endows it with excellent viscoelastic pro-perties.Additionally,the distinctive infrared spectral feature peak of SBS modified asphalt has been identified,offering a novel method for the rapid identification and assessment of SBS modified as-phalt.Utilizing grey relational analysis,the following order of correlation between the content of func-tional groups and the complex shear modulus is determined:sulfoxide group>aromatic ring>carbonyl.Furthermore,the sequence of correlation between the content of functional groups and asphalt surface energy is as follows:aromatic ring>carbonyl>sulfoxide group.These findings further substantiate that the oxidation of functional groups and the reconfiguration of microstructural morphology are pivotal in influencing the variation of the complex shear modulus throughout the aging of asphalt,offering a fresh theoretical perspective on the aging behavior of asphalt materials.关键词
沥青老化/流变力学/荧光显微镜/红外光谱/表面能/灰色关联分析Key words
asphalt aging/rheological mechanics/fluorescence microscopy/infrared spectrum/surface energy/gray correlation analysis分类
交通工程引用本文复制引用
郭猛,何舒欣,龚演,严二虎,梁美琛..沥青老化前后宏-微观性能相关性[J].交通运输研究,2024,10(1):58-69,12.
