Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Graphene nanoplatelet/polypropylene pellets in cement-based composites: Mechanical, piezoresistive and microstructural properties
Abstract Graphene nanoplatelet–reinforced polypropylene is considered a promising conductive polymer-based additive to provide unique features to cementitious composites. This study comprehensively investigated the collective effects of graphene and polypropylene in the form of graphene nanoplatelet/polypropylene pellets (GrPp). Adding GrPp increased the flexural strength of the cementitious composites due to its high tensile strength. Moreover, the GrPp-enhanced cementitious composites show a high piezoresistive absolute maximum fractional change in electrical resistivity (FCR) of 96.50 %, stress sensitivity of 4.13 %/MPa, and repeatability of 90.81 % with the addition of 2–3.5 wt% GrPp on average. Furthermore, adding GrPp improved the piezoresistive behavior by forming a conductive path and increasing the deformability of the cementitious composites. These findings demonstrate that Gr-reinforced Pp pellets present an economical and efficient way to develop piezoresistive stress sensors for smart cement-based composites.
Highlights The mechanical, piezoresistive, and microstructural properties were assessed. Novel GrPp-reinforced cementitious composites were produced. GrPp-reinforced cementitious composites exhibit remarkable stress sensitivities. The flexural strength of cementitious composites was enhanced by GrPp usage. GrPp-reinforced cementitious composites behave as miniature cement-based sensor.
Graphene nanoplatelet/polypropylene pellets in cement-based composites: Mechanical, piezoresistive and microstructural properties
Abstract Graphene nanoplatelet–reinforced polypropylene is considered a promising conductive polymer-based additive to provide unique features to cementitious composites. This study comprehensively investigated the collective effects of graphene and polypropylene in the form of graphene nanoplatelet/polypropylene pellets (GrPp). Adding GrPp increased the flexural strength of the cementitious composites due to its high tensile strength. Moreover, the GrPp-enhanced cementitious composites show a high piezoresistive absolute maximum fractional change in electrical resistivity (FCR) of 96.50 %, stress sensitivity of 4.13 %/MPa, and repeatability of 90.81 % with the addition of 2–3.5 wt% GrPp on average. Furthermore, adding GrPp improved the piezoresistive behavior by forming a conductive path and increasing the deformability of the cementitious composites. These findings demonstrate that Gr-reinforced Pp pellets present an economical and efficient way to develop piezoresistive stress sensors for smart cement-based composites.
Highlights The mechanical, piezoresistive, and microstructural properties were assessed. Novel GrPp-reinforced cementitious composites were produced. GrPp-reinforced cementitious composites exhibit remarkable stress sensitivities. The flexural strength of cementitious composites was enhanced by GrPp usage. GrPp-reinforced cementitious composites behave as miniature cement-based sensor.
Graphene nanoplatelet/polypropylene pellets in cement-based composites: Mechanical, piezoresistive and microstructural properties
Şimşek, Barış (Autor:in) / Uygunoğlu, Tayfun (Autor:in) / Fidan, Uğur (Autor:in) / Ceran, Özge Bildi (Autor:in) / Eryeşil, Özge (Autor:in)
20.02.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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