Effects of compression on porous texture of clay powder: Application to uranium diffusion

Highlight
- We characterize the porous texture of compacted bulk and Na-saturated clay.
- We perform in-diffusion tests to investigate the effect of density on Uranium diffusion.
- The apparent diffusion coefficients values of Uranium are determined.
- Uranium diffusion depends on surface and pore diffusion models.
- Results obtained will be used as basic data for the safety assessment of a repository.