Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Study on the properties of GNPs/PS and GNPs/ODA composites incorporated SBS modified asphalt after short-term and long-term aging
Graphical abstract Display Omitted
Highlights Rheological properties of aged asphalt can be improved by GNPs/ODA and GNPs/PS. GNPs/PS and GNPs/ODA can improve internal network structure of aged SBS modified asphalt. GNPs/PS and GNPs/ODA can effectively alleviate the degradation of SBS polymer during the aging process. The master curve of complex modulus of modified asphalt was studied.
Abstract In this study, polystyrene (PS) and octadecylamine (ODA) were grafted onto the graphene nanoplatelets (GNPs), to obtain GNPs/PS and GNPs/ODA which were then composited with styrene butadiene styrene (SBS) to prepare GNPs/ODA-SBS and GNPs/PS-SBS incorporated modified asphalts. The performance, aging process and chemical aspects of different modified asphalts were analyzed via three major indexes (ductility, penetration, and softening point), dynamic shear rheometer (DSR), Fourier transform infra-red (FT-IR) spectroscopy and fluorescence microscopy (FM) tests. Test results illustrated that softening point of the aged asphalt is reduced while the ductility increased slightly. Compared with their original state, softening point of the 0.08% GNPs/ODA-SBS modified asphalt decreased by about 9.32% after aging, while 0.04% GNPs/PS-SBS modified asphalt exhibited maximum increase in aging (decreased by 9.8%). Furthermore, the aged asphalt with modified GNPs (mGNPs) added exhibited improved viscoelastic properties and high temperature stability as compared to the pure aged SBS modified asphalt. This phenomenon was attributed to the inhibition of oxidation reaction during the aging process of mGNPs in the SBS modified asphalt, and hence can be deemed of great potential for practical applications and long-term storage of asphalt.
Study on the properties of GNPs/PS and GNPs/ODA composites incorporated SBS modified asphalt after short-term and long-term aging
Graphical abstract Display Omitted
Highlights Rheological properties of aged asphalt can be improved by GNPs/ODA and GNPs/PS. GNPs/PS and GNPs/ODA can improve internal network structure of aged SBS modified asphalt. GNPs/PS and GNPs/ODA can effectively alleviate the degradation of SBS polymer during the aging process. The master curve of complex modulus of modified asphalt was studied.
Abstract In this study, polystyrene (PS) and octadecylamine (ODA) were grafted onto the graphene nanoplatelets (GNPs), to obtain GNPs/PS and GNPs/ODA which were then composited with styrene butadiene styrene (SBS) to prepare GNPs/ODA-SBS and GNPs/PS-SBS incorporated modified asphalts. The performance, aging process and chemical aspects of different modified asphalts were analyzed via three major indexes (ductility, penetration, and softening point), dynamic shear rheometer (DSR), Fourier transform infra-red (FT-IR) spectroscopy and fluorescence microscopy (FM) tests. Test results illustrated that softening point of the aged asphalt is reduced while the ductility increased slightly. Compared with their original state, softening point of the 0.08% GNPs/ODA-SBS modified asphalt decreased by about 9.32% after aging, while 0.04% GNPs/PS-SBS modified asphalt exhibited maximum increase in aging (decreased by 9.8%). Furthermore, the aged asphalt with modified GNPs (mGNPs) added exhibited improved viscoelastic properties and high temperature stability as compared to the pure aged SBS modified asphalt. This phenomenon was attributed to the inhibition of oxidation reaction during the aging process of mGNPs in the SBS modified asphalt, and hence can be deemed of great potential for practical applications and long-term storage of asphalt.
Study on the properties of GNPs/PS and GNPs/ODA composites incorporated SBS modified asphalt after short-term and long-term aging
Wei, Yunhao (Autor:in) / Liu, Yu (Autor:in) / Muhammad, Yaseen (Autor:in) / Subhan, Sidra (Autor:in) / Meng, Fei (Autor:in) / Ren, Denghui (Autor:in) / Han, Meizhao (Autor:in) / Li, Jing (Autor:in)
26.05.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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