Holmehus clay — A Tertiary smectitic clay of potential use for isolation of hazardous waste
| Autor: | Roland Pusch, Thao Hoang-Minh, Jörn Kasbohm, Lan Nguyen-Thanh, Sven Knutsson |
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| Rok vydání: | 2015 |
| Předmět: |
Civil engineering and architecture - Geoengineering and mining engineering
Waste management Smectite alteration Hydraulic conductivity Expansive clay Swelling pressure Geology Geotechnical Engineering Geotechnical Engineering and Engineering Geology Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik Si-buffer capacity Holmehus clay Geoteknik Mining engineering Hazardous waste Engineered barrier system |
| Zdroj: | Engineering Geology. 188:38-47 |
| ISSN: | 0013-7952 |
| DOI: | 10.1016/j.enggeo.2015.01.005 |
| Popis: | 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. Validerad; 2015; Nivå 2; 20140310 (svek) |
| Databáze: | OpenAIRE |
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