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A platform for research: civil engineering, architecture and urbanism
Mechanisms of ion transport in cement-based materials during the application of corrosion mitigating electrical techniques
Several techniques have been developed and are used in practice by applying an external electric field in order to mitigate corrosion of reinforcing steel and protect structures from deterioration. The most widely used techniques are impressed current cathodic protection, electrochemical chloride extraction, and electrochemical realkalization. Other techniques have also been developed but are not yet widely used. These techniques include concrete drying using an electro-osmotic pulse, removal of contaminating ions from concrete, electrokinetic nanoparticle treatment, and concrete crack closure by electrodeposition. Even though much attention is given on the practical application of these techniques, less attention is given to the mechanisms of ion movement inside the pores of the cement paste under the application of an external electric field. These techniques are briefly presented in this paper and the similarities and differences are pointed out. The mechanisms of ion movement inside the pores of concrete at the microscopic scale are discussed making reference to the electric double layer and the zeta-potential in cement paste. The parameters that control the effectiveness of these techniques are also discussed.
Mechanisms of ion transport in cement-based materials during the application of corrosion mitigating electrical techniques
Several techniques have been developed and are used in practice by applying an external electric field in order to mitigate corrosion of reinforcing steel and protect structures from deterioration. The most widely used techniques are impressed current cathodic protection, electrochemical chloride extraction, and electrochemical realkalization. Other techniques have also been developed but are not yet widely used. These techniques include concrete drying using an electro-osmotic pulse, removal of contaminating ions from concrete, electrokinetic nanoparticle treatment, and concrete crack closure by electrodeposition. Even though much attention is given on the practical application of these techniques, less attention is given to the mechanisms of ion movement inside the pores of the cement paste under the application of an external electric field. These techniques are briefly presented in this paper and the similarities and differences are pointed out. The mechanisms of ion movement inside the pores of concrete at the microscopic scale are discussed making reference to the electric double layer and the zeta-potential in cement paste. The parameters that control the effectiveness of these techniques are also discussed.
Mechanisms of ion transport in cement-based materials during the application of corrosion mitigating electrical techniques
Mechanismus des Ionentransports in Zementbasis-Werkstoffen während der Anwendung einer elektrischen korrosionsmildernden Technik
Aligizaki, Kalliopi K. (author)
2012
15 Seiten, 4 Bilder, 1 Tabelle, 34 Quellen
Conference paper
English
Ion transport mechanisms in cement-based materials
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