Ultraviolet aging study on bitumen modified by a composite of clay and fumed silica nanoparticles

In this study, surface morphology, rheological and chemical properties were investigated of bitumen, which was modified by a composite of clay and fumed silica nanoparticles, and exposed to ultraviolet (UV) aging in laboratory. The volume fraction of the nanoparticles within the binder ranged from 1...

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Bibliographic Details
Published in:Scientific reports 2020-07, Vol.10 (1), p.11216-11216, Article 11216
Main Authors: Cheraghian, Goshtasp, Wistuba, Michael P.
Format: Article
Language:English
Subjects:
639/166/986
639/925/357
639/925/929
Aging
Carbonyl compounds
Chemical properties
Clay
Fourier transforms
Humanities and Social Sciences
Joint ventures
Morphology
multidisciplinary
Nanoparticles
Oxidation
Rheology
Scanning electron microscopy
Science
Science (multidisciplinary)
Silica
Silicones
Ultraviolet radiation
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Summary:In this study, surface morphology, rheological and chemical properties were investigated of bitumen, which was modified by a composite of clay and fumed silica nanoparticles, and exposed to ultraviolet (UV) aging in laboratory. The volume fraction of the nanoparticles within the binder ranged from 1 to 3%, the temperature range considered was 30 to 70 °C. Surface morphology, rheological and chemical binder properties were analyzed using field emission scanning electron microscopy (FESEM), dynamic shear rheometer (DSR), and Fourier transform infrared (FT-IR) spectroscopy. It was found, that the bitumen modification through clay and fumed silica nanoparticles changed resulting binder properties significantly. The index of carbonyl and oxidation degree decreased, and the clay and fumed silica nanoparticles improved aging resistance to ultraviolet (UV) radiation considerably. The results indicate that the mechanical stability of the modified bitumen is very much driven by the specific concentration of clay and fumed silica nanoparticles.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-020-68007-0