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Effects Of Nano - Cuo, Mwcnt And Sbs On The Aging Of Asphalt Binder: Ftir And Xrd Analyses

Submitted2021-04-02
Last Update2021-04-04
TitleEffects Of Nano - Cuo, Mwcnt And Sbs On The Aging Of Asphalt Binder: Ftir And Xrd Analyses
Author(s)Author #1
Name: Nahid Amini
Org: Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Country:
Email: nahid.amini@srbiau.ac.ir

Author #2
Name: Hassan Latifi
Org: Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Country:
Email: hassan.latifi@srbiau.ac.ir

Author #3
Name: Parham Hayati
Org: Assistant Professor, Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Country:
Email: p.hayati@srbiau.ac.ir

Other Author(s)
Contact AuthorAuthor #2
Alt Email: hassan.latifi@srbiau.ac.ir
Telephone:
Keywords Asphalt aging, XRD, Nano-CuO, Oxidation, FTIR, Carbonyl.
AbstractHere, the aging behavior of asphalt was evaluated by investigation of the changes of rheological, chemical, physical, microstructural and macrostructural properties of pure and well-dispersed Nano-CuO, multiwall carbon nanotube; MWCNT and SBS-modified asphalt binders. Firstly, rotating thin-film oven and pressurized aging vessel experiments were conducted to prepare short- and long-term aging samples, respectively. In the following, rotational viscosity (RV), dynamic shear rheometry (DSR), Fourier transform infra-red (FTIR), scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses were carried out. RV and DSR analyses showed that modified asphalt binders had more viscosity and aging resistance than pure ones. FTIR spectra indicated a decrease of sulfur and oxygen, in the form of sulfoxide and carbonyl, respectively, especially in the Nano-CuO-modified asphalt binder. Besides, chemical reactions in the modified-asphalt binders enhanced the oxidation and thermal resistances. XRD pattern illustrated a direct relationship between the aging of the asphalt binder and the crystallinity of the studied asphalt binders. Also, Nano-CuO-modified and Nano-CuO-SBS-modified asphalt binders were chemically more uniform and homogeneous than other samples. Moreover, the calculated aging index (AI), G*�sin(δ) and FTIR & XRD patterns accurately confirmed each other.
Paperview paper 5930.pdf (1065KB)

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