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Analysis on Migration Mechanism of Chloride Ions in Concrete Close-End Pipe Piles
Different migration mechanisms of chloride in concrete are introduced and various kinds of influences on diffusion coefficient, including temperature, relative humidity and age are also elaborated. Based on Fick second law and the boundary condition of close-end pipe pile, the analytical solution to chloride migration equation due to the process of both diffusion and convection is deduced. Applying this result to a typical jacked PHC pile, the chloride concentration is analyzed and the effect, which the seepage velocity, thickness of pipe pile and the diffusion coefficient have on distribution of chloride concentration, is also discussed. This example provides a computational basis for the corrosion of steel bar and some reference values for durability design of pipe pile.
Analysis on Migration Mechanism of Chloride Ions in Concrete Close-End Pipe Piles
Different migration mechanisms of chloride in concrete are introduced and various kinds of influences on diffusion coefficient, including temperature, relative humidity and age are also elaborated. Based on Fick second law and the boundary condition of close-end pipe pile, the analytical solution to chloride migration equation due to the process of both diffusion and convection is deduced. Applying this result to a typical jacked PHC pile, the chloride concentration is analyzed and the effect, which the seepage velocity, thickness of pipe pile and the diffusion coefficient have on distribution of chloride concentration, is also discussed. This example provides a computational basis for the corrosion of steel bar and some reference values for durability design of pipe pile.
Analysis on Migration Mechanism of Chloride Ions in Concrete Close-End Pipe Piles
Lecture Notes in Civil Engineering
Yang, Yang (editor) / Yang, Bo. (author)
2023-02-14
11 pages
Article/Chapter (Book)
Electronic Resource
English
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