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A platform for research: civil engineering, architecture and urbanism
Effect of hydroxyl ions on chloride penetration depth measurement using the colorimetric method
AbstractIn this paper, the effect of hydroxyl ions on chloride penetration depth measurement using the colorimetric method was studied. Equivalent silver nitrate solution (i.e. Ag+=Cl−) was added to the NaCl+NaOH solution with different concentrations, then the amount of precipitated silver chloride and silver oxide were determined by chemical methods, and the color of the precipitated products was examined. Results show that the amount of silver chloride formed decreases linearly as OH− to Cl− ratio (r) increases. Thus, the chloride concentration at color change boundary changes with the pH value of the concrete. AgCl has a white color, while Ag2O has a dark brown color. When the value of r exceeds 4, the color of the mixture looks brown, and color change boundary cannot be easily distinguished.
Effect of hydroxyl ions on chloride penetration depth measurement using the colorimetric method
AbstractIn this paper, the effect of hydroxyl ions on chloride penetration depth measurement using the colorimetric method was studied. Equivalent silver nitrate solution (i.e. Ag+=Cl−) was added to the NaCl+NaOH solution with different concentrations, then the amount of precipitated silver chloride and silver oxide were determined by chemical methods, and the color of the precipitated products was examined. Results show that the amount of silver chloride formed decreases linearly as OH− to Cl− ratio (r) increases. Thus, the chloride concentration at color change boundary changes with the pH value of the concrete. AgCl has a white color, while Ag2O has a dark brown color. When the value of r exceeds 4, the color of the mixture looks brown, and color change boundary cannot be easily distinguished.
Effect of hydroxyl ions on chloride penetration depth measurement using the colorimetric method
Yuan, Qiang (author) / Shi, Caijun (author) / He, Fuqiang (author) / De Schutter, Geert (author) / Audenaert, Katrien (author) / Zheng, Keren (author)
Cement and Concrete Research ; 38 ; 1177-1180
2008-04-03
4 pages
Article (Journal)
Electronic Resource
English
Effect of hydroxyl ions on chloride penetration depth measurement using the colorimetric method
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