Microstructural and Mechanical Characterization of the Interface between Concrete and Chemically Reactive Enamel (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.
Recommended Citation
D. Yan et al., "Microstructural and Mechanical Characterization of the Interface between Concrete and Chemically Reactive Enamel (CRE) Coated Rebar," Construction and Building Materials, vol. 263, Elsevier Ltd, Dec 2020.
The definitive version is available at https://doi.org/10.1016/j.conbuildmat.2020.120676
Department(s)
Civil, Architectural and Environmental Engineering
Research Center/Lab(s)
INSPIRE - University Transportation Center
Keywords and Phrases
Bond behavior; Bond enhancement; Coating type; CRE coating; Curing age; Rebar-concrete interface
International Standard Serial Number (ISSN)
0950-0618
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2020 Elsevier Ltd, All rights reserved.
Publication Date
10 Dec 2020
Comments
Financial supports to complete this study by National Natural Science Foundation of China under Grant Nos. 51778570, and 51879230 are greatly appreciated.