Publication Type Journal Article
Title Influence of GFRP Confinement of Reinforced Concrete Columns on the Corrosion of Reinforcing Steel in a Salt Water Environment
Authors Bruno Sena da Fonseca A S Castela Manuel A. G. Silva R.G. Duarte M. G. S. Ferreira Maria F. Montemor
Groups CSSE
Journal JOURNAL OF MATERIALS IN CIVIL ENGINEERING
Year 2015
Month January
Volume 27
Number 1
Pages
Abstract This paper concentrates on the changes on the corrosion rate of the steel bars of RC columns due to their wrapping with glass fiber-reinforced polymers (GFRPs). RC cylindrical laboratorial specimens, both unwrapped and wrapped with GFRP, were immersed in a sodium chloride solution for 20 months. The changes on concrete resistivity and the corrosion process were followed by open potential measurements and electrochemical impedance. It was possible to quantify the influence of the GFRP jackets in the solution uptake and on the corrosion of the steel reinforcement. The results showed a delay on the diffusion of the solution into concrete due to the presence of the GFRP, which allowed that the bars remained in a passive state for longer immersion periods. The GFRP barrier lowered the rate of uptake of the solution and the chloride ion penetration. However, the GFRP jacket may have the properties as a physical barrier reduced due to imperfect application. The incomplete concrete saturation makes oxygen available, thus promoting an intense corrosion activity at the rebars. (C) 2014 American Society of Civil Engineers.
DOI http://dx.doi.org/10.1061/(ASCE)MT.1943-5533.0001039
ISBN
Publisher ASCE-AMER SOC CIVIL ENGINEERS
Book Title
ISSN 0899-1561
EISSN 1943-5533
Conference Name
Bibtex ID ISI:000346342900010
Observations
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