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Resistance to salt-corrosion of concrete with externally bonded FRP sheets in marine environment
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0003-2668-1329
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering. School of Civil Engineering, Southeast University, P.R. China.ORCID iD: 0000-0002-8372-1967
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0003-0089-8140
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0003-3548-6082
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2022 (English)In: Bridge Safety, Maintenance, Management, Life-Cycle, Resilience and Sustainability: Proceedings of the Eleventh International Conference on Bridge Maintenance, Safety and Management (IABMAS 2022), Barcelona, Spain, July 11-15, 2022 / [ed] Joan Ramon Casas; Dan M. Frangopol; Jose Turmo, CRC Press, 2022, p. 2495-2502Conference paper, Published paper (Refereed)
Abstract [en]

FRP sheets are often externally bonded onto concrete surface to strengthen concrete bridges. Salt-corrosion resistance of concrete strengthened with three types of FRP sheets, i.e. unidirectional CFRP, unidirectional BFRP, bidirectional BFRP, was evaluated by measuring the compressive strength and chloride ion concentration (CIC) profile after NaCl solution immersion. Results show that as exposure time increases, the compressive strength of BFRP-strengthened concrete decreases, while that of CFRP-strengthened concrete changes little, but both are higher than that of un-strengthened concrete. Internal CICs of FRP-strengthened concrete decrease significantly, with the reduction of over 80%. Wrapping bidirectional BFRP sheet shows the strongest chloride penetration resistance, followed by unidirectional CFRP and finally unidirectional BFRP. Chloride diffusion coefficient of the concrete shows obvious time and depth dependence, which reduces with time, and increases and tends to stabilize along depth. A model of chloride diffusion coefficient considering time-depth dependence was established to predict CICs in the concrete.

Place, publisher, year, edition, pages
CRC Press, 2022. p. 2495-2502
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-95585DOI: 10.1201/9781003322641-311OAI: oai:DiVA.org:ltu-95585DiVA, id: diva2:1735928
Conference
11th International Conference on Bridge Maintenance, Safety and Management (IABMAS 2022), Barcelona, Spain, July 11-15, 2022
Note

ISBN för värdpublikation: 978-1-003-32264-1

Available from: 2023-02-10 Created: 2023-02-10 Last updated: 2023-02-10Bibliographically approved

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Liu, DongyunTu, YongmingWang, ChaoGonzalez-Libreros, JaimeSas, GabrielElfgren, Lennart

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