Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Direct characterization of steel fibre corrosion in pre-cracked ultra-high performance concrete (UHPC) with different crack widths
Highlights Potentiodynamic polarization was used to directly characterize steel fibre corrosion. NaCl solution was effective to inhibit steel fibre corrosion in UHPC. Steel fibres with a distance of less than 15 mm from crack corroded more seriously. Cracks of 0.5 mm and 0.75 mm mitigated steel fibre corrosion in the late period.
Abstract The potentiodynamic polarization was used to directly characterize steel fibre corrosion, and the voltammetry was used as the complement, in pre-cracked ultra-high performance concrete (UHPC), during 36 wetting-drying cycles lasted for 180 days. Cracks of 5 different widths of 0 mm, 0.25 mm, 0.50 mm, 0.75 mm and 1.00 mm were pre-produced in specimens. Results showed that steel fibre on the surface of concrete easily corroded and the effect of chloride ion on steel fibre corrosion in UHPC was mainly limited to the vicinity of crack. In this experiment, after 30 wetting-drying cycles in NaCl solution, the corrosion degree of steel fibers in UHPC with crack widths of 0.50 mm and 0.75 mm was lower than that with other widths.
Direct characterization of steel fibre corrosion in pre-cracked ultra-high performance concrete (UHPC) with different crack widths
Highlights Potentiodynamic polarization was used to directly characterize steel fibre corrosion. NaCl solution was effective to inhibit steel fibre corrosion in UHPC. Steel fibres with a distance of less than 15 mm from crack corroded more seriously. Cracks of 0.5 mm and 0.75 mm mitigated steel fibre corrosion in the late period.
Abstract The potentiodynamic polarization was used to directly characterize steel fibre corrosion, and the voltammetry was used as the complement, in pre-cracked ultra-high performance concrete (UHPC), during 36 wetting-drying cycles lasted for 180 days. Cracks of 5 different widths of 0 mm, 0.25 mm, 0.50 mm, 0.75 mm and 1.00 mm were pre-produced in specimens. Results showed that steel fibre on the surface of concrete easily corroded and the effect of chloride ion on steel fibre corrosion in UHPC was mainly limited to the vicinity of crack. In this experiment, after 30 wetting-drying cycles in NaCl solution, the corrosion degree of steel fibers in UHPC with crack widths of 0.50 mm and 0.75 mm was lower than that with other widths.
Direct characterization of steel fibre corrosion in pre-cracked ultra-high performance concrete (UHPC) with different crack widths
Wang, Sijia (Autor:in) / Guo, Xiaolu (Autor:in) / Guo, Zhenwen (Autor:in) / He, Changxuan (Autor:in) / Duan, Xinzhi (Autor:in) / Hu, Wenpei (Autor:in) / Zhuang, Kailin (Autor:in)
17.11.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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