Carbon fiber reinforced plastics (CFRP) used for the strengthening of reinforced concrete structures damaged by steel corrosion can promote galvanic coupling phenomena. The risk of macrocouple generated by conductive carbon fibers on corroding steel was investigated. Reinforcing bars subjected to pitting corrosion in chloride contaminated concrete were coupled with CFRP laminate embedded in chloride-free concrete and with externally bonded CFRP laminates or sheets. The CFRP laminate embedded in concrete generated a remarkable macrocouple current. When the CFRP were externally bonded to surface of the concrete, consequences of galvanic coupling were negligible, even at temperatures higher than 40°C. The macrocouple current greatly increased when a layer of mortar was applied to coat the composite material.

Risk of galvanic corrosion induced by CFRP strengthening in reinforced concrete

BERTOLINI, LUCA;GASTALDI, MATTEO MARIA;PEDEFERRI, MARIAPIA
2007-01-01

Abstract

Carbon fiber reinforced plastics (CFRP) used for the strengthening of reinforced concrete structures damaged by steel corrosion can promote galvanic coupling phenomena. The risk of macrocouple generated by conductive carbon fibers on corroding steel was investigated. Reinforcing bars subjected to pitting corrosion in chloride contaminated concrete were coupled with CFRP laminate embedded in chloride-free concrete and with externally bonded CFRP laminates or sheets. The CFRP laminate embedded in concrete generated a remarkable macrocouple current. When the CFRP were externally bonded to surface of the concrete, consequences of galvanic coupling were negligible, even at temperatures higher than 40°C. The macrocouple current greatly increased when a layer of mortar was applied to coat the composite material.
2007
Corrosion of reinforcement in concrete: mechanisms, monitoring, inhibitors and rehabilitation techniques
9781420044010
9781845692100
File in questo prodotto:
File Dimensione Formato  
EFC38_2007-CFRP.pdf

Accesso riservato

: Post-Print (DRAFT o Author’s Accepted Manuscript-AAM)
Dimensione 2.94 MB
Formato Adobe PDF
2.94 MB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/552013
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 2
social impact