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Structural retrofitting of corroded fly ash based concrete beams with fibres to improve bending characteristics

Structural retrofitting of corroded fly ash based concrete beams with fibres to improve bending... Generally, it is known that concrete and its embedded steel reinforcement progressively deteriorate when exposed to aggressive environments, yet when this defect deepens it leaves the concrete structure in unserviceable state. Therefore, the current study aims to evaluate the bending characteristics of corroded fly ash based fibre retrofitted concrete beams. Thus, the study attempts to measure the corrosion inhibition characteristics of fibre retrofitted reinforced concrete beams. Aside beams produced with conventional materials, other beams were produced with fly ash fixed at 30% replacement of Ordinary Portland Cement. Beams were cured in water for up to 34 days before they were induced in simulated corrosive environment. Some corroded beams were retrofitted with basalt fibre and others with sisal fibre, before being subjected to bending test. Despite the evident deterioration resulting from corrosion, the results clearly indicated that the fibres provided additional strengths to the corroded beams, with basalt fibre producing better response to loading at about 18% capacity than control beam before failure. Basalt fibre has been found to enhance the structural bending capacity of corroded member. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Australian Journal of Structural Engineering Taylor & Francis

Structural retrofitting of corroded fly ash based concrete beams with fibres to improve bending characteristics

Structural retrofitting of corroded fly ash based concrete beams with fibres to improve bending characteristics

Australian Journal of Structural Engineering , Volume 20 (3): 6 – Jul 3, 2019

Abstract

Generally, it is known that concrete and its embedded steel reinforcement progressively deteriorate when exposed to aggressive environments, yet when this defect deepens it leaves the concrete structure in unserviceable state. Therefore, the current study aims to evaluate the bending characteristics of corroded fly ash based fibre retrofitted concrete beams. Thus, the study attempts to measure the corrosion inhibition characteristics of fibre retrofitted reinforced concrete beams. Aside beams produced with conventional materials, other beams were produced with fly ash fixed at 30% replacement of Ordinary Portland Cement. Beams were cured in water for up to 34 days before they were induced in simulated corrosive environment. Some corroded beams were retrofitted with basalt fibre and others with sisal fibre, before being subjected to bending test. Despite the evident deterioration resulting from corrosion, the results clearly indicated that the fibres provided additional strengths to the corroded beams, with basalt fibre producing better response to loading at about 18% capacity than control beam before failure. Basalt fibre has been found to enhance the structural bending capacity of corroded member.

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References (30)

Publisher
Taylor & Francis
Copyright
© 2019 Engineers Australia
ISSN
2204-2261
eISSN
1328-7982
DOI
10.1080/13287982.2019.1622490
Publisher site
See Article on Publisher Site

Abstract

Generally, it is known that concrete and its embedded steel reinforcement progressively deteriorate when exposed to aggressive environments, yet when this defect deepens it leaves the concrete structure in unserviceable state. Therefore, the current study aims to evaluate the bending characteristics of corroded fly ash based fibre retrofitted concrete beams. Thus, the study attempts to measure the corrosion inhibition characteristics of fibre retrofitted reinforced concrete beams. Aside beams produced with conventional materials, other beams were produced with fly ash fixed at 30% replacement of Ordinary Portland Cement. Beams were cured in water for up to 34 days before they were induced in simulated corrosive environment. Some corroded beams were retrofitted with basalt fibre and others with sisal fibre, before being subjected to bending test. Despite the evident deterioration resulting from corrosion, the results clearly indicated that the fibres provided additional strengths to the corroded beams, with basalt fibre producing better response to loading at about 18% capacity than control beam before failure. Basalt fibre has been found to enhance the structural bending capacity of corroded member.

Journal

Australian Journal of Structural EngineeringTaylor & Francis

Published: Jul 3, 2019

Keywords: Corrosion; fly ash; basalt fibre; sisal fibre; bending test; retrofitting

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