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• W4380451776 abstract "An accurate evaluation of sulfate attack (SA) diffusion and damage processes is critical for durability design in sulfate-contaminated environments. This study presents a three-dimensional cellular automata model algorithm (3D-CAm) that effectively simulates sulfate diffusion processes in concrete. The model's efficacy was verified through comparison with analytical solutions of Fick's second law (FSL), experimental data, and numerical methods reported in the literature. The outcomes demonstrate that the model has a high degree of accuracy in simulating the diffusion processes of SA in concrete. Moreover, based on the diffusion characteristics of sulfate, damage evolution, and deterioration of concrete mechanical properties, the 3D-CAm is developed and applied for modeling and evaluating the long-term effects of SA on the durability of a concrete bridge. The time and space-dependent multifactorial diffusivity stochastic effects were considered. The model algorithms are developed in Python to achieve this purpose. The simulation results revealed that the randomness of the multifactorial had a negative effect on the increasing sulfate diffusion and accelerating the degradation of the mechanical properties of concrete. Moreover, the relationship between sulfate concentration, damage degree, and corrosion time is presented. The results indicate that the damage degree plays a critical role in the deterioration of the mechanical properties of concrete, where with the increase in service time, the mechanical properties show a noteworthy decrease due to the increase in corrosion depth and deterioration of the cross-section area. To conclude, the 3D-CAm model provides a suitable and effective method for evaluating the diffusion and damage processes of SA in concrete bridges. It offers a valuable way to evaluate damage risk and design durable projects in corrosive environments." @default.
• W4380451776 created "2023-06-14" @default.
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• W4380451776 date "2023-09-01" @default.
• W4380451776 modified "2023-09-29" @default.
• W4380451776 title "An approach for simulating and evaluating the effect of sulfate attack on the durability of concrete bridges based on a three-dimensional cellular automata model" @default.
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• W4380451776 doi "https://doi.org/10.1016/j.engstruct.2023.116451" @default.
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