Evolution of the bond strength between reinforcing steel and fibre reinforced concrete after high temperature exposure

Please use this identifier to cite or link to this item: http://hdl.handle.net/10045/75496
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Title: Evolution of the bond strength between reinforcing steel and fibre reinforced concrete after high temperature exposure
Authors: Varona Moya, Francisco de Borja | Baeza, F. Javier | Bru, David | Ivorra, Salvador
Research Group/s: Grupo de Ensayo, Simulación y Modelización de Estructuras (GRESMES) | Durabilidad de Materiales y Construcciones en Ingeniería y Arquitectura
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería Civil
Keywords: Bond strength | Pull-out strength | Fibre reinforced concrete | High performance concrete | High temperature
Knowledge Area: Ingeniería de la Construcción | Mecánica de Medios Continuos y Teoría de Estructuras
Issue Date: 10-Jul-2018
Publisher: Elsevier
Citation: Construction and Building Materials. 2018, 176: 359-370. doi:10.1016/j.conbuildmat.2018.05.065
Abstract: Reinforced concrete structural strength depends on the bond between steel rebars and concrete. This mechanism can be compromised during a fire, but may be one of the least investigated phenomena in concrete research, and is not addressed in concrete design codes. This paper is focused on the characterization of the bond strength after exposure to temperatures up to 825 °C, by means of pull-out tests carried out in normal and high strength concrete, with polypropylene and steel fibres. Compressive and pull-out tests were performed after exposure to high temperature and cooling down to room temperature. Hybrid fibre addition including steel fibres with a high aspect ratio proved beneficial to the peak bond strength at the highest temperatures tested. However, high strength concretes exposed to 450 °C presented higher bond strength losses if steel fibres were added. Finally, equations are proposed for predicting the bond strength after high temperature exposure.
URI: http://hdl.handle.net/10045/75496
ISSN: 0950-0618 (Print) | 1879-0526 (Online)
DOI: 10.1016/j.conbuildmat.2018.05.065
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2018 Elsevier Ltd.
Peer Review: si
Publisher version: https://doi.org/10.1016/j.conbuildmat.2018.05.065
Appears in Collections:INV - DMCIA - Artículos de Revistas
INV - GRESMES - Artículos de Revistas

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