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Hydrothermal Field Experiment Simulating Steel Canister Embedded in Expansive Clay - Physical Behavior of the Clay

Published online by Cambridge University Press:  25 February 2011

Roland Pusch ,
Ola Karnland ,
Alain Lajudie  and
Rosemarie Atabek
Roland Pusch
Affiliation:
Clay Technology AB, Ideon, S-223 70 Lund, Sweden
Ola Karnland
Affiliation:
Clay Technology AB, Ideon, S-223 70 Lund, Sweden
Alain Lajudie
Affiliation:
CEA, Boite Postale No. 6, F-92260 Fontenay-aux-Roses, France
Rosemarie Atabek
Affiliation:
CEA, Boite Postale No. 6, F-92260 Fontenay-aux-Roses, France
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Abstract

Field heat experiments with kaolinite/smectite clay surrounding heaters in boreholes were conducted for 0.7 and 4 years with temperatures up to 170-180°C. The short test gave a high degree of water saturation even in the hottest part (> 75 %) and almost no change in physical properties and mineral composition. The long test gave a dry inner zone of claystone, indicating gas formation, and rich precipitation of silica/aluminum compounds and sulphate minerals. Brittleness characterized the hot parts and stiffening occurred also in the colder parts due to precipitation of silica and aluminum.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 257: Symposium – Scientific Basis for Nuclear Waste Management XV , 1991 , 547
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

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