Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Modern method for sealing deep boreholes
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-6851-4839
El-Tekno AB, Eltekno AB, Oscarshamn, Sweden.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.ORCID iD: 0000-0002-1365-8552
2016 (English)In: Engineering Geology, ISSN 0013-7952, E-ISSN 1872-6917, Vol. 202, p. 132-142Article in journal (Refereed) Published
Abstract [en]

A method for sealing cored boreholes using dense montmorillonite clay in perforated copper tubes where the rock has only very fine fractures, and concrete cast where the holes intersect water-bearing fracture zones, has been used for closing 100 to 500 m deep boreholes made for site investigation in Sweden and Finland. Application of this technique to even deeper boreholes requires performance analysis respecting placeability and long-term function of the clay and concrete, individually and in combination, as discussed in the paper. Placeability requires that maturation of the initially unsaturated clay is neither too fast nor too slow and means of controlling the rate are described. The proposed concrete material has a very low cement content and talc as fluidizer, which gives slow but ultimately very significant strengthening and low solubility of the cement reaction products. At a few kilometers depth the temperature can be more than 60oC, which has to be sustained by the sealing materials, and this makes saponite and mixed-layer smectite/illite possible alternatives to montmorillonite clay. The concept is judged to be applicable also to backfilling of wider holes for disposal of highly radioactive waste.

Place, publisher, year, edition, pages
2016. Vol. 202, p. 132-142
Keywords [en]
borehole, canister, clay, concrete, disposal, radionuclide, sealing, waste, Civil engineering and architecture - Geoengineering and mining engineering
Keywords [sv]
Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik
National Category
Geotechnical Engineering
Research subject
Soil Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-3658DOI: 10.1016/j.enggeo.2016.01.009ISI: 000370888700013Scopus ID: 2-s2.0-84955091835Local ID: 17984285-07dc-4029-8eb6-aad8f7f95959OAI: oai:DiVA.org:ltu-3658DiVA, id: diva2:976516
Note
Validerad; 2016; Nivå 2; 20140727 (svek)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records BETA

Pusch, RolandKnutsson, Sven

Search in DiVA

By author/editor
Pusch, RolandKnutsson, Sven
By organisation
Mining and Geotechnical Engineering
In the same journal
Engineering Geology
Geotechnical Engineering

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 58 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf