| Autor: |
Shafaei Bajestani, Mahsa, Nasir, Othman |
| Zdroj: |
Geotechnical & Geological Engineering; Jan2025, Vol. 43 Issue 1, p1-24, 24p |
| Abstrakt: |
Bentonite-based material (BBSM) is the preferred sealing material in deep geological repository (DGR) barrier systems for the long-term disposal of radioactive waste. Ensuring the safety of these systems hinges on the accurate prediction of BBSM properties during re-saturation. In response to these requirements, a hydro-mechanical (HM) process is employed to anticipate the response and behavior of BBSMs during re-saturation. In the context of this study, a novel HM model is developed that integrates a multiscale porosity model with a new swell model based on the Mohr–Coulomb failure criterion. By linking these components, the developed HM model proves capable of predicting changes in hydraulic properties, evaluating swelling strains, and assessing pressure induced by alterations in saturation levels. The developed model was calibrated and applied to bentonite materials of HM column experiments. Furthermore, the proposed HM model undergoes validation through a small-scale mock-up test involving a mixture of bentonite and sand samples. The results obtained from the model align closely with experimental measurements for hydraulic properties and swelling stresses, affirming its reliability. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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