期刊
CEMENT AND CONCRETE RESEARCH
卷 47, 期 -, 页码 1-7出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2013.01.011
关键词
Reinforcing steel; Mortar; Corrosion; Spent FCC catalyst; Electrochemical impedance spectroscopy
资金
- Portuguese Foundation for Science and Technology [PTDC/ECM/105427/2008]
- Fundação para a Ciência e a Tecnologia [PTDC/ECM/105427/2008] Funding Source: FCT
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. (C) 2013 Elsevier Ltd. All rights reserved.
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