Numerical Simulation of Pore Erosion in Concrete Structure
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Abstract:
The concrete material has a porous structure due to its own physical and chemical properties, and the pore structure determines the strength and permeability of concrete. In this paper, the complex porous structure of concrete was simplified to the single capillary. According to the Fick's law and mass conservation principle, the dissolution equation of concrete pores was obtained, and the erosion model was established based on the research of capillary permeability of porous medium in Bear theory and saturated solute transport diffusion equations. The simulation results showed that the model can reflect the variations of dissolution and concentration of solid phase calcium ions and erosion thickness of side wall in pores.
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