Microstructural investigation of calcium montmorillonite

Michal Matusewicz, K. Pirkkalainen, V. Liljeström, J.P. Suuronen, A. Root, A. Muurinen, R. Serimaa, Markus Olin

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    12 Citations (Scopus)

    Abstract

    Bentonite clay is planned to form a part of deep-geological repositories of spent nuclear fuel in several countries. The extremely long operation time of the repository requires an in-depth understanding of the structure and properties of used materials. In this work the microstructure of a simplified system of Ca-montmorillonite is investigated using a set of complementary methods: X-ray diffraction, small angle X-ray scattering, nuclear magnetic resonance, transmission electron microscopy and ion exclusion. The paper presents experimental results obtained from compacted, water saturated samples in the dry density range 0.6–1.5 g/cm3. It can be observed that different methods yield similar quantification of water present in the interlamellar space. Combined results support the multiple porosity concept of the bentonite structure.
    Original languageEnglish
    Pages (from-to)267-276
    Number of pages9
    JournalClay Minerals
    Volume48
    Issue number2
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA1 Journal article-refereed

    Keywords

    • betonite buffer
    • calcium
    • hlw repositories
    • microstructure
    • montmorillonite

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  • Cite this

    Matusewicz, M., Pirkkalainen, K., Liljeström, V., Suuronen, J. P., Root, A., Muurinen, A., Serimaa, R., & Olin, M. (2013). Microstructural investigation of calcium montmorillonite. Clay Minerals, 48(2), 267-276. https://doi.org/10.1180/claymin.2013.048.2.08