Holmehus clay: A Tertiary smectitic clay of potential use for isolation of hazardous waste
2015 (English)In: Engineering Geology, ISSN 0013-7952, E-ISSN 1872-6917, Vol. 188, 38–47- p.Article in journal (Refereed) Published
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.
Holmehus clay, Engineered barrier system, Smectite alteration, Hydraulic conductivity, Swelling pressure, Si-buffer capacity, Civil engineering and architecture - Geoengineering and mining engineering
Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik
Research subject Soil Mechanics
IdentifiersURN: 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
Validerad; 2015; Nivå 2; 20140310 (svek)2016-09-292016-09-292016-10-19Bibliographically approved