Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Microstructural and mechanical characterization of the interface between concrete and chemically reactive enamel (CRE) coated rebar
Highlights The evolution of air voids at the interface between concrete and CRE coated rebar is studied. CRE coated rebar is superior to the uncoated and epoxy coated rebars in terms of bond strength and initial stiffness. The enhanced concrete layer and the stronger adhesion explain the outperformed bond behavior of CRE coated rebar.
Abstract Chemically reactive enamel (CRE) coating is an inorganic coating used for corrosion protection and bond enhancement of steel rebar in reinforced concrete (RC) structures. In this study, the bond behavior of CRE coated deformed rebar in concrete was characterized through pull-out tests. The formation and development of the microstructure at the rebar-concrete interface was characterized using Scanning Electron Microscopy (SEM). The effects of coating type, concrete curing age, and rebar size on the rebar-concrete bond behavior were investigated systematically. In addition, efforts were made to understand the mechanism of using CRE coated rebar to enhance bonding. Based on the above observations, the CRE coating significantly influenced the microstructure at the rebar-concrete interface. The rebar with CRE coating had superior mechanical properties to that with epoxy coating and the uncoated rebar due to the enhanced interfacial transition zone and coating adhesion.
Microstructural and mechanical characterization of the interface between concrete and chemically reactive enamel (CRE) coated rebar
Highlights The evolution of air voids at the interface between concrete and CRE coated rebar is studied. CRE coated rebar is superior to the uncoated and epoxy coated rebars in terms of bond strength and initial stiffness. The enhanced concrete layer and the stronger adhesion explain the outperformed bond behavior of CRE coated rebar.
Abstract Chemically reactive enamel (CRE) coating is an inorganic coating used for corrosion protection and bond enhancement of steel rebar in reinforced concrete (RC) structures. In this study, the bond behavior of CRE coated deformed rebar in concrete was characterized through pull-out tests. The formation and development of the microstructure at the rebar-concrete interface was characterized using Scanning Electron Microscopy (SEM). The effects of coating type, concrete curing age, and rebar size on the rebar-concrete bond behavior were investigated systematically. In addition, efforts were made to understand the mechanism of using CRE coated rebar to enhance bonding. Based on the above observations, the CRE coating significantly influenced the microstructure at the rebar-concrete interface. The rebar with CRE coating had superior mechanical properties to that with epoxy coating and the uncoated rebar due to the enhanced interfacial transition zone and coating adhesion.
Microstructural and mechanical characterization of the interface between concrete and chemically reactive enamel (CRE) coated rebar
Yan, Dongming (Autor:in) / Qian, Hao (Autor:in) / Xu, Zhenwen (Autor:in) / Chen, Shikun (Autor:in) / Chen, Genda (Autor:in)
18.08.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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Local bond strength of vitreous enamel coated rebar to concrete
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