As an important aspect of concrete durability damage,sulfate corrosion,has been paid more and more attention.According to Fick's second law and chemical reaction dynamic equation,a numerical analysis method of sulfate corrosion on concrete at meso-scale is established.Based on the random convex polygon aggregate model of concrete,the finite element software is developed by Matlab program,and the meso numerical analysis method of sulfate corrosion process on concrete based on diffusion reaction is established,and the results are compared with the test results.The results show that the simulation results obtained by the meso numerical method of sulfate erosion process are in good agreement with the experimental results,and can effectively simulate the sulfate erosion process of concrete.The SO4-ion concentration of concrete increases with the increase of SO42-ion concentration in a certain depth range.The diffusion coefficient of SO42-ion in mortar is the main factor affecting the maximum erosion depth of SO42-ion.The thickness of interface transition zone has little effect on concrete damage in sulfate environment.
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