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Effect of self-healing materials on steel reinforcement corrosion of concrete
A novel kind of self-healing materials, which is named catalytic crystalline waterproof coatings (CCWC) can permeate into pores and cracks of concrete and catalyze reaction to increase the impermeability of concrete. This paper reported the results of a study conducted to evaluate steel reinforcement corrosion of concrete specimens uncoated and coated with CCWC as well as mixed with CCWC. The test results of water impermeability, water absorption, chloride permeability and potential clearly showed that CCWC could prohibit water, any soluble salts and moisture from penetrating the concrete to cause corrosion, leaking, and relevant problems. Moreover, results of the secondary impermeability test and SEM micrographs indicated that the active chemical component has strong ability of pervasion and could penetrate into the inner of concrete to cause a chemical change reaction, which generates a great quantity of non-soluble dendritic crystalline. It makes concrete more compacted and inhibits the pervasion of water and aggressive mediator. Moreover, the active chemical component can be recovered after the reaction so that it can work for a longer term and endow cement-based materials with a self-healing function. It was concluded that CCWC is very effective to protect the steel reinforcement from corrosion in concrete.
Effect of self-healing materials on steel reinforcement corrosion of concrete
A novel kind of self-healing materials, which is named catalytic crystalline waterproof coatings (CCWC) can permeate into pores and cracks of concrete and catalyze reaction to increase the impermeability of concrete. This paper reported the results of a study conducted to evaluate steel reinforcement corrosion of concrete specimens uncoated and coated with CCWC as well as mixed with CCWC. The test results of water impermeability, water absorption, chloride permeability and potential clearly showed that CCWC could prohibit water, any soluble salts and moisture from penetrating the concrete to cause corrosion, leaking, and relevant problems. Moreover, results of the secondary impermeability test and SEM micrographs indicated that the active chemical component has strong ability of pervasion and could penetrate into the inner of concrete to cause a chemical change reaction, which generates a great quantity of non-soluble dendritic crystalline. It makes concrete more compacted and inhibits the pervasion of water and aggressive mediator. Moreover, the active chemical component can be recovered after the reaction so that it can work for a longer term and endow cement-based materials with a self-healing function. It was concluded that CCWC is very effective to protect the steel reinforcement from corrosion in concrete.
Effect of self-healing materials on steel reinforcement corrosion of concrete
Der Einfluss von Selbstheilungswerkstoffen auf die Korrosion von Betonstahl
Wang, Guiming (author) / Guo, Zha-Qi (author) / Yu, Jianying (author) / Shui, Zhonghe (author)
2007
8 Seiten, 5 Bilder, 3 Tabellen, 11 Quellen
Conference paper
Storage medium
English
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