Abstract By analyzing the mechanism of chloride ion erosion in concrete segments, andbased on the Fick second diffusion law, the chloride ion erosion model with variable diffusion coefficients was set up , in which the time, and diffusion depth were taken into consideration comprehensively. The effectiveness and reliability of this model was verified by an analysis of experimental data concerning the anti-erosion performance of tunnel segments. Compared to the conventional Fick second diffusion law model considering constant diffusion coefficients, this model can not only reflect the development trend of chloride ion erosion of the structure itself and the chloride ion concentration in concretes at various depths, but also predict the chloride ion content in different phases or at various depths. Furthermore, it can predict when corrosion will occur in reinforcements.
Abstract：
By analyzing the mechanism of chloride ion erosion in concrete segments, andbased on the Fick second diffusion law, the chloride ion erosion model with variable diffusion coefficients was set up , in which the time, and diffusion depth were taken into consideration comprehensively. The effectiveness and reliability of this model was verified by an analysis of experimental data concerning the anti-erosion performance of tunnel segments. Compared to the conventional Fick second diffusion law model considering constant diffusion coefficients, this model can not only reflect the development trend of chloride ion erosion of the structure itself and the chloride ion concentration in concretes at various depths, but also predict the chloride ion content in different phases or at various depths. Furthermore, it can predict when corrosion will occur in reinforcements.
LI ,
ZHI 1,
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.Model of Chloride Ion Erosion in Segment Concrete Considering Variable Diffusion Coefficients[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(1): 105-109
2014, Vol. 51 