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A novel corrosion resistant repair technique for existing reinforced concrete (RC) elements using polyvinyl alcohol fibre reinforced geopolymer concrete (PVAFRGC)

A novel corrosion resistant repair technique for existing reinforced concrete (RC) elements using polyvinyl alcohol fibre reinforced geopolymer concrete (PVAFRGC)
A novel corrosion resistant repair technique for existing reinforced concrete (RC) elements using polyvinyl alcohol fibre reinforced geopolymer concrete (PVAFRGC)
Strain hardening fibre reinforced geopolymer concrete, which utilises waste material rather than primary mineral products and is suitable for cast-in-place applications, shows considerable potential as a resistant, more environmentally friendly, concrete repair material. This study assesses the corrosion protection performance of polyvinyl alcohol fibre reinforced geopolymer concrete as a repair material. The applicability of polyvinyl alcohol fibre reinforced geopolymer concrete as a repair material for preventing steel corrosion was investigated using specimens that simulated surface coating repair. Large scale beam repair was conducted using beams where part of the concrete cover at various depths (12.5% and 25% of the total beam depth) was replaced by polyvinyl alcohol fibre reinforced geopolymer concrete. Accelerated corrosion tests were performed using an induced current technique by applying a nominal 300 mA/cm2 constant anodic current for approximately 90 days. Results from flexural strength tests showed significant improvements in the structural performance of the reinforced concrete beams repaired with polyvinyl alcohol fibre reinforced geopolymer concrete following accelerated corrosion. The results can be summarised as follows: surface coating with polyvinyl alcohol fibre reinforced geopolymer concrete significantly reduced corrosion damage in terms of mass loss, crack distributions and structural performance, while differences in surface coating thickness also considerably affected the corrosion resistance of the repaired beams.
0950-0618
603-619
Al-Majidi, Mohammed Haloob
2bf1e66a-804e-4a56-86cf-a9616f61f960
Lampropoulos, Andreas P.
6416ee41-92fa-4ede-a655-e2352f0a55a3
Cundy, Andrew B.
994fdc96-2dce-40f4-b74b-dc638286eb08
Tsioulou, Ourania T.
57269f96-1ff3-41ba-8cd2-15887da26422
Al-Rekabi, Salam
cb4f8835-2f85-4fd2-b262-328edf0737ef
Al-Majidi, Mohammed Haloob
2bf1e66a-804e-4a56-86cf-a9616f61f960
Lampropoulos, Andreas P.
6416ee41-92fa-4ede-a655-e2352f0a55a3
Cundy, Andrew B.
994fdc96-2dce-40f4-b74b-dc638286eb08
Tsioulou, Ourania T.
57269f96-1ff3-41ba-8cd2-15887da26422
Al-Rekabi, Salam
cb4f8835-2f85-4fd2-b262-328edf0737ef

Al-Majidi, Mohammed Haloob, Lampropoulos, Andreas P., Cundy, Andrew B., Tsioulou, Ourania T. and Al-Rekabi, Salam (2018) A novel corrosion resistant repair technique for existing reinforced concrete (RC) elements using polyvinyl alcohol fibre reinforced geopolymer concrete (PVAFRGC). Construction and Building Materials, 164, 603-619. (doi:10.1016/j.conbuildmat.2017.12.213).

Record type: Article

Abstract

Strain hardening fibre reinforced geopolymer concrete, which utilises waste material rather than primary mineral products and is suitable for cast-in-place applications, shows considerable potential as a resistant, more environmentally friendly, concrete repair material. This study assesses the corrosion protection performance of polyvinyl alcohol fibre reinforced geopolymer concrete as a repair material. The applicability of polyvinyl alcohol fibre reinforced geopolymer concrete as a repair material for preventing steel corrosion was investigated using specimens that simulated surface coating repair. Large scale beam repair was conducted using beams where part of the concrete cover at various depths (12.5% and 25% of the total beam depth) was replaced by polyvinyl alcohol fibre reinforced geopolymer concrete. Accelerated corrosion tests were performed using an induced current technique by applying a nominal 300 mA/cm2 constant anodic current for approximately 90 days. Results from flexural strength tests showed significant improvements in the structural performance of the reinforced concrete beams repaired with polyvinyl alcohol fibre reinforced geopolymer concrete following accelerated corrosion. The results can be summarised as follows: surface coating with polyvinyl alcohol fibre reinforced geopolymer concrete significantly reduced corrosion damage in terms of mass loss, crack distributions and structural performance, while differences in surface coating thickness also considerably affected the corrosion resistance of the repaired beams.

Text AlMajidi et al 2018 for upload - Accepted Manuscript
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More information

Accepted/In Press date: 27 December 2017
e-pub ahead of print date: 6 January 2018
Published date: 10 March 2018

Identifiers

Local EPrints ID: 417561
URI: https://eprints.soton.ac.uk/id/eprint/417561
ISSN: 0950-0618
PURE UUID: 50e0af04-ba10-4a8f-a2d9-23a7192360e3
ORCID for Andrew B. Cundy: ORCID iD orcid.org/0000-0003-4368-2569

Catalogue record

Date deposited: 05 Feb 2018 17:30
Last modified: 06 Jun 2018 12:21

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Contributors

Author: Mohammed Haloob Al-Majidi
Author: Andreas P. Lampropoulos
Author: Andrew B. Cundy ORCID iD
Author: Ourania T. Tsioulou
Author: Salam Al-Rekabi

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