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A platform for research: civil engineering, architecture and urbanism
Corrosion mitigation in concrete beams using electrokinetic nanoparticle treatment
Chloride induced reinforcement corrosion is a major cause of civil infrastructure deterioration. This study evaluated the corrosion behavior of reinforced concrete beams when subjected to EN (electrokinetic nanoparticle) treatment. This treatment utilized a weak electric field to transport nanoscale pozzolans directly to the steel reinforcement. Each beam was subjected to saltwater exposure followed by ECE (electrochemical chloride extraction) and EN treatment. The specimens were re-exposed to saltwater following treatment. Results from this test indicated significantly lower corrosion rates among the EN treated specimens (0.006 mils per year) as compared to the untreated controls (0.87 mils per year). SEM (Scanning Electron Microscopy) was used to examine the microstructural impact of the treatment process. A reduction in porosity (adjacent to the steel) of 40% was observed due to EN treatment. During treatment application, the electric field also caused chlorides to be drawn away from the reinforcement and extracted from the concrete beam. After the chloride had been extracted, the nanoparticles apparently formed a physical barrier against chloride re-penetration.
Corrosion mitigation in concrete beams using electrokinetic nanoparticle treatment
Chloride induced reinforcement corrosion is a major cause of civil infrastructure deterioration. This study evaluated the corrosion behavior of reinforced concrete beams when subjected to EN (electrokinetic nanoparticle) treatment. This treatment utilized a weak electric field to transport nanoscale pozzolans directly to the steel reinforcement. Each beam was subjected to saltwater exposure followed by ECE (electrochemical chloride extraction) and EN treatment. The specimens were re-exposed to saltwater following treatment. Results from this test indicated significantly lower corrosion rates among the EN treated specimens (0.006 mils per year) as compared to the untreated controls (0.87 mils per year). SEM (Scanning Electron Microscopy) was used to examine the microstructural impact of the treatment process. A reduction in porosity (adjacent to the steel) of 40% was observed due to EN treatment. During treatment application, the electric field also caused chlorides to be drawn away from the reinforcement and extracted from the concrete beam. After the chloride had been extracted, the nanoparticles apparently formed a physical barrier against chloride re-penetration.
Corrosion mitigation in concrete beams using electrokinetic nanoparticle treatment
Korrosionsminderung von Betonbalken unter Verwendung einer elektrokinetischen Nanopartikelbehandlung
Kupwade-Patil, K. (author) / Gordon, K. (author) / Xu, K. (author) / Moral, O. (author) / Cardenas, H. (author) / Lee, L. (author)
2009
7 Seiten, 14 Bilder, 5 Tabellen, 14 Quellen
Conference paper
English
Corrosion mitigation in concrete beams using electrokinetic nanoparticle treatment
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