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Holmehus clay: A Tertiary smectitic clay of potential use for isolation of hazardous waste
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
Greifswald University.
Hanoi University of Science, Vietnam National University.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-1365-8552
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2015 (English)In: Engineering Geology, ISSN 0013-7952, E-ISSN 1872-6917, Vol. 188, 38-47 p.Article in journal (Refereed) Published
Abstract [en]

The Danish Tertiary Holmehus clay belongs to the series of illite-smectite mixed-layer clays in northern Europe and has a potential to serve as an effective engineered barrier for isolating hazardous waste. Mineralogical specification was made of the components illite/smectite mixed-layer and dioctahedral vermiculite/smectite mixed-layer structures. The lower content of expandable phase than of smectite- rich clays like MX-80 gives somewhat higher hydraulic conductivity and somewhat lower swelling pressure but both are deemed suitable for isolating canisters with high-level radioactive waste in deeprepositories for densities at water saturation of at least 1900 kg/m3. The lower swelling pressure, the potential of being chemically more stable, and the high buffer capacity by providing dissolved Si makes Holmehus clay a candidate for use in both deep and near-surface repositories.

Place, publisher, year, edition, pages
2015. Vol. 188, 38-47 p.
Keyword [en]
Holmehus clay, Engineered barrier system, Smectite alteration, Hydraulic conductivity, Swelling pressure, Si-buffer capacity, Civil engineering and architecture - Geoengineering and mining engineering
Keyword [sv]
Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-7104DOI: 10.1016/j.enggeo.2015.01.005Local ID: 56c9c6c2-4eb7-4f14-bd4e-5224c06fd9e9OAI: oai:DiVA.org:ltu-7104DiVA: diva2:979991
Note

Validerad; 2015; Nivå 2; 20140310 (svek)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Pusch, RolandKnutsson, Sven

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