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A study on cement-poor concrete with talc for borehole sealing in rock hosting radioactive waste
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
Greifswald University, Geographical & Geological Department, Germany.
Greifswald University, Geographical & Geological Department, Germany.
Luleå University of Technology.
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2014 (English)In: Comunicações Geológicas, ISSN 0873-948X, E-ISSN 1647-581X, Vol. 101, no 1, 71-74 p.Article in journal (Refereed) Published
Abstract [en]

The paper describes the performance of a concrete intended for sealing deep boreholes in the host rock of radioactive repositories. The concrete will form plugs where fracture zones are intersected and be located between very tight seals of smectite clay installed where the surrounding rock is tight. The concrete must be able to carry the clay segments after a couple of days but the bearing capacity does not have to be very high since the clay soon adheres to the rock and carries itself. The concrete contains talc as superplasticizer since ordinary organic additives for reaching high fluidity at casting are unwanted. It has a low cement content for maintaining its low porosity after dissolution in a long time perspective.

Place, publisher, year, edition, pages
2014. Vol. 101, no 1, 71-74 p.
Keyword [en]
clay, concrete, ductility, strength, talc, 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-3957Local ID: 1cd13b93-3a3f-4527-8651-14f0cd71c8e5OAI: oai:DiVA.org:ltu-3957DiVA: diva2:976819
Note
Validerad; 2015; Nivå 1; 20140916 (svek)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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