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- W4220669498 endingPage "106766" @default.
- W4220669498 startingPage "106766" @default.
- W4220669498 abstract "This study presents an integrated multiscale framework for modelling ionic diffusivity in unsaturated concrete accounting for its microstructural features and 3D moisture distribution. The hierarchical microstructure of concrete at multiscale from nano- to meso-scale is mimicked, based on which the fluid-solid interaction and moisture distribution in pore network of concrete with various saturation levels are simulated using a lattice Boltzmann multiphase model. A lattice Boltzmann-finite difference model for diffusion is developed to mimic the ionic diffusion and predict the ionic diffusivity in unsaturated concrete. Results indicate that ionic diffusivity in unsaturated concrete highly depends on moisture content and distribution, pore structure, and aggregate content. As the water saturation level drops to around 90%, interfacial transition zone starts to retard ionic diffusion. Voids have a great contribution to water saturation level but less effect on ionic diffusivity. The simulation results of ionic diffusivity at each scale agree well with experimental data." @default.
- W4220669498 created "2022-04-03" @default.
- W4220669498 creator A5034046996 @default.
- W4220669498 creator A5042026897 @default.
- W4220669498 date "2022-06-01" @default.
- W4220669498 modified "2023-10-05" @default.
- W4220669498 title "Multiscale modelling of ionic diffusivity in unsaturated concrete accounting for its hierarchical microstructure" @default.
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- W4220669498 doi "https://doi.org/10.1016/j.cemconres.2022.106766" @default.
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