The prediction model of concrete durability based on permeability
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Abstract:
Through gas permeability test, water absorption test, and chloride ion erosion test of concrete samples with different mix proportions, this article has analyzed the relationship between the chloride ion diffusion coefficient and permeability, established a concrete durability prediction model based on permeability, and verified the model with a coastal sluice. The results showed that gas permeability coefficient, water absorption coefficient, and chloride ion diffusion coefficient would all increase with the increase of water cement ratio; in different water cement ratio conditions, chloride ion diffusion coefficient would increase with the increase of gas permeability and water absorption coefficient, showing a certain correlation between them. Just by testing the permeability of concrete structures, the established prediction model of concrete durability can predict the service life of the concrete structures. The model was verified and proven feasible with a coastal sluice. It has great significance in predicting the service life of concrete structures in chloride environment directly based on their permeability.
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