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A Talc-Based Cement-Poor Concrete for Sealing Boreholes in Rock
- Source :
- Engineering. :251-267
- Publication Year :
- 2013
- Publisher :
- Scientific Research Publishing, Inc., 2013.
-
Abstract
- Deep investigation boreholes in crystalline rock for site selection of repositories for high-level radioactive waste are proposed to be sealed by installing a series of dense concrete and clay plugs. These should prevent radionuclides from leaking canisters at depth to migrate to the biosphere through the holes. The concrete seals will be installed where the holes intersect water-bearing fracture zones to serve as stable and low-permeable supports for adjacent clay plugs. Low porosity and microstructural stability must be guaranteed for many thousands of years and ordinary Portland cement with organic superplastizer will not fulfil the requirements since the high pH will cause degradation of contacting clay and the organic additive can produce colloids with a capacity to carry radionuclides up to the biosphere. Very cement-poor concrete (Validerad; 2013; 20130104 (mohhat)
- Subjects :
- Civil engineering and architecture - Geoengineering and mining engineering
Cement
Superplasticizer
Site selection
Borehole
Radioactive waste
Geotechnical Engineering
Talc
SamhÀllsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik
Geoteknik
Superplasticizers
medicine
Clay
Geotechnical engineering
Strength
Geology
Soil mechanics
Ductility (Earth science)
Concrete
Ductility
medicine.drug
Subjects
Details
- ISSN :
- 1947394X, 19473931, and 20130104
- Database :
- OpenAIRE
- Journal :
- Engineering
- Accession number :
- edsair.doi.dedup.....eb426bf1238401303f339c6999e6c751
- Full Text :
- https://doi.org/10.4236/eng.2013.53036