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Study on the interfacial bonding behaviour of corroded steel bars and TRC constrained concrete

Chang-Shun Hu (Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, China)
Shiping Yin (Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, China)
Meng-Ti Yin (Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 16 August 2019

Issue publication date: 22 August 2019

Abstract

Purpose

This paper aims to evaluate the bonding properties of textile reinforced concrete (TRC)-confined concrete and corroded plain round bars.

Design/methodology/approach

The bonding performance of three types of specimens (not reinforced, reinforced after corrosion and reinforced before corrosion) was studied by a central pull out test.

Findings

The ultimate bond strength between the corroded steel bars and the concrete is improved when the corrosion ratio is small. After cracking, the degree of corrosion continues to grow and the ultimate bond strength decreases. TRC reinforcement has no detectable effect on the interfacial bonding properties between concrete and plain round bars when the corrosion of steel bars is small; however, when the concrete cracks under the action of rust corrosion, the TRC constraints can effectively improve the bonding performance of the two components.

Practical implications

TRC layer significantly delayed the chloride penetration rate, which can effectively limit the development of corrosion cracking.

Keywords

Acknowledgements

The authors gratefully acknowledge the Fundamental Research Funds for the Central Universities (2017XKZD09). The experimental work described in this paper was conducted at the Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Civil Engineering in the China University of Mining and Technology. The help provided during the testing from staff members and students at the Laboratory is greatly acknowledged.

Citation

Hu, C.-S., Yin, S. and Yin, M.-T. (2019), "Study on the interfacial bonding behaviour of corroded steel bars and TRC constrained concrete", Anti-Corrosion Methods and Materials, Vol. 66 No. 5, pp. 661-670. https://doi.org/10.1108/ACMM-12-2018-2040

Publisher

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Emerald Publishing Limited

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