A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Monitoring semi-free swelling and water transport in bentonites using X-ray radiography (2024)


Tanttu, J., Harjupatana, T., Miettinen, A., & Kataja, M. (2024). Monitoring semi-free swelling and water transport in bentonites using X-ray radiography. Applied Clay Science, 256, Article 107443. https://doi.org/10.1016/j.clay.2024.107443


JYU-tekijät tai -toimittajat


Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajatTanttu, Joni; Harjupatana, Tero; Miettinen, Arttu; Kataja, Markku

Lehti tai sarjaApplied Clay Science

ISSN0169-1317

eISSN1872-9053

Julkaisuvuosi2024

Ilmestymispäivä01.06.2024

Volyymi256

Artikkelinumero107443

KustantajaElsevier

JulkaisumaaAlankomaat

Julkaisun kielienglanti

DOIhttps://doi.org/10.1016/j.clay.2024.107443

Julkaisun avoin saatavuusAvoimesti saatavilla

Julkaisukanavan avoin saatavuusOsittain avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX)https://jyx.jyu.fi/handle/123456789/95552


Tiivistelmä

Clay materials such as montmorillonite-rich bentonite, are planned to be used as buffer materials between waste canisters and host rock in deep geological radioactive waste repositories. To ensure the safety of the repository over very long time scales, it is essential to understand the mechanical and transport properties of the clay materials through measurements and modelling. Here, an experimental method based on X-ray radiography was used to gather temporal data on the hydro-mechanical behaviour and homogenisation of three bentonites with different initial dry densities and wetting solution chemistry. The results showed that the salinity of wetting solution and the dominant cation of montmorillonite affect the overall saturation and swelling process of the clay material thus indicating that there is a chemical coupling to the hydro-mechanical behaviour of montmorillonite-rich clay materials. In particular, higher salinity was associated with more rapid wetting and a more homogeneous distribution of bentonite material in the final state of the experiments. The results also highlighted that the new measurement method is much faster and less cumbersome than traditional gravimetric methods. The method yielded detailed data on the wetting and swelling processes, and may thus help obtain better insight on the intricate hydro-mechanical properties of clay materials.


YSO-asiasanatmateriaalitutkimussavibentoniittifysikaaliset ominaisuudetsuolaisuusvesipitoisuusmonitorointiröntgenkuvausradioaktiiviset jätteetloppusijoitus

Vapaat asiasanatX-ray radiography; deformation; water transport; bentonite; montmorillonite; swelling


Liittyvät organisaatiot

JYU-yksiköt:


Hankkeet, joissa julkaisu on tehty


OKM-raportointiKyllä

VIRTA-lähetysvuosi2024

Alustava JUFO-taso1


Viimeisin päivitys 2025-12-03 klo 21:45