Thermal aging behavior characteristics of asphalt binder modified by nano-stabilizer based on DSR and AFM

In order to clarify the effect of thermal aging on the nano-stabilized modified asphalt binder, TINUVIN 770 (T770) hindered amine light stabilizer of nanoscale was selected as aging modifying agent to prepare modified asphalt. The impact of thermal aging on the rheological properties of T770-modifie...

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Bibliographic Details
Published inNanotechnology reviews (Berlin) Vol. 10; no. 1; pp. 1157 - 1182
Main Authors Sun, Xiaolong, Yuan, Junshen, Zhang, Yikang, Yin, Yingmei, Lv, Jianbing, Jiang, Shuo
Format Journal Article
LanguageEnglish
Published Berlin De Gruyter 01.01.2021
Walter de Gruyter GmbH
Subjects
Aging
Asphalt
Atomic force microscopes
Atomic force microscopy
Binders (materials)
Creep recovery
Heat resistance
High temperature
Morphology
nano-stabilizer
Parameter identification
Parameter modification
Rheological properties
Rheology
Scrap
Sulfuric acid
Surface roughness
thermal aging
Thermal resistance
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Summary:In order to clarify the effect of thermal aging on the nano-stabilized modified asphalt binder, TINUVIN 770 (T770) hindered amine light stabilizer of nanoscale was selected as aging modifying agent to prepare modified asphalt. The impact of thermal aging on the rheological properties of T770-modified asphalt was investigated using dynamic shear rheological test of frequency sweep and multiple stress creep recovery test. The surface roughness variation of T770-modified asphalt was characterized by using atomic force microscope throughout the thermal aging process. Furthermore, the typical morphology and parameter features of T770-modified asphalt were identified. The results showed that with the extension of thermal aging time, the high temperature rutting resistance of T770-modified asphalt was improved, while the unrecoverable creep compliance was degraded. When the thermal aging time exceeded 6 h, the bee structure appeared on the surface of T770-modified asphalt. Meanwhile, with the increase in thermal aging time, the special structure formed on the surface of asphalt gradually became smaller. The surface fluctuation difference of T770-modified asphalt reflected the better thermal aging resistance property of T770-modified asphalt than 70# asphalt.
ISSN:2191-9097
2191-9089
2191-9097
DOI:10.1515/ntrev-2021-0075