Chloride-induced corrosion behavior of reinforcing steel in spent fluid cracking catalyst modified mortars

Concrete properties can be improved by various additives. Nowadays there is a strong interest concerning the use of spent fluid catalytic cracking catalyst (SFCC) as an admixture to improve mechanical properties of concrete. This work aims at studying the corrosion resistance of steel rebars in SFCC...

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Bibliographic Details
Published in:Cement and concrete research 2013-05, Vol.47, p.1-7
Main Authors: Morozov, Y., Castela, A.S., Dias, A.P.S., Montemor, M.F.
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Catalysts
Cements
Concretes
Concretes. Mortars. Grouts
Corrosion
Corrosion (C)
Corrosion rate
Corrosion resistance
Durability. Pathology. Repairing. Maintenance
Electrochemical impedance spectroscopy (B)
Exact sciences and technology
Materials
Mortar (E)
Mortars
Reinforced concrete
Reinforcing steel (D)
Reinforcing steels
Spent FCC catalyst (E)
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Summary:Concrete properties can be improved by various additives. Nowadays there is a strong interest concerning the use of spent fluid catalytic cracking catalyst (SFCC) as an admixture to improve mechanical properties of concrete. This work aims at studying the corrosion resistance of steel rebars in SFCC modified mortar specimens. Results of physicochemical characterization indicate the acceleration of cement hydration due to pozzolanic activity of SFCC. Electrochemical measurements show that the addition of the SFCC enhances corrosion resistance by delaying its corrosion onset and decreasing the corrosion rate. These benefits can be attributed to the reduction of the mortar permeability.
ISSN:0008-8846
1873-3948
DOI:10.1016/j.cemconres.2013.01.011