Microstructural investigation of calcium montmorillonite

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

Research output: Contribution to journalArticleScientificpeer-review

10 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

Fingerprint

Bentonite
bentonite
montmorillonite
repository
calcium
Calcium
dry density
Geological repositories
nuclear magnetic resonance
transmission electron microscopy
microstructure
Water
Spent fuels
porosity
X-ray diffraction
scattering
Nuclear fuels
X ray scattering
clay
water

Keywords

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

Cite this

Matusewicz, M., Pirkkalainen, K., Liljeström, V., Suuronen, J. P., Root, A., Muurinen, A., ... Olin, M. (2013). Microstructural investigation of calcium montmorillonite. Clay Minerals, 48(2), 267-276. https://doi.org/10.1180/claymin.2013.048.2.08
Matusewicz, Michal ; Pirkkalainen, K. ; Liljeström, V. ; Suuronen, J.P. ; Root, A. ; Muurinen, A. ; Serimaa, R. ; Olin, Markus. / Microstructural investigation of calcium montmorillonite. In: Clay Minerals. 2013 ; Vol. 48, No. 2. pp. 267-276.
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Matusewicz, M, Pirkkalainen, K, Liljeström, V, Suuronen, JP, Root, A, Muurinen, A, Serimaa, R & Olin, M 2013, 'Microstructural investigation of calcium montmorillonite', Clay Minerals, vol. 48, no. 2, pp. 267-276. https://doi.org/10.1180/claymin.2013.048.2.08

Microstructural investigation of calcium montmorillonite. / Matusewicz, Michal; Pirkkalainen, K.; Liljeström, V.; Suuronen, J.P.; Root, A.; Muurinen, A.; Serimaa, R.; Olin, Markus.

In: Clay Minerals, Vol. 48, No. 2, 2013, p. 267-276.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Matusewicz, Michal

AU - Pirkkalainen, K.

AU - Liljeström, V.

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AU - Muurinen, A.

AU - Serimaa, R.

AU - Olin, Markus

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AB - 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.

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Matusewicz M, Pirkkalainen K, Liljeström V, Suuronen JP, Root A, Muurinen A et al. Microstructural investigation of calcium montmorillonite. Clay Minerals. 2013;48(2):267-276. https://doi.org/10.1180/claymin.2013.048.2.08