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Clay-Based Materials for Engineered Barriers : A Review

Published online by Cambridge University Press:  15 February 2011

Alain Lajudie ,
Joël Raynal ,
Jean-Claude Petit  and
Pierre Toulhoat
Alain Lajudie
Affiliation:
Commissariat à I’Energie Atomique - DCC/DESD/SESD - Centre d’Etudes de Fontenay aux Roses - BP6, 92265 Fontenay aux Roses Cedex France
Joël Raynal
Affiliation:
Commissariat à I’Energie Atomique - DCC/DESD/SESD - Centre d’Etudes de Fontenay aux Roses - BP6, 92265 Fontenay aux Roses Cedex France
Jean-Claude Petit
Affiliation:
Commissariat à I’Energie Atomique - DCC/DESD/SESD - Centre d’Etudes de Fontenay aux Roses - BP6, 92265 Fontenay aux Roses Cedex France
Pierre Toulhoat
Affiliation:
Commissariat à I’Energie Atomique - DCC/DESD/SESD - Centre d’Etudes de Fontenay aux Roses - BP6, 92265 Fontenay aux Roses Cedex France
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Extract

The potential importance of backfilling and plugging in underground radioactive waste repositories has led differents research institutions around the world (SKB in Sweden, CEA in France, AECL in Canada, etc.) to carry out extensive studies of swelling clay materials for the development of engineered barriers. These materials, which have to be emplaced in underground conditions, should combine a variety of complementary properties from both the hydro-thermo-mechanical and geochemical viewpoints: impermeability, swelling ability in order to fill all void space, heat transfer and retention capacity for the most noxious radionuclides. For years, the scientific community has acknowledged the fact that smectite clays best exhibit these properties and, thus, most of the research effort has been devoted to this type of materials. The aim of such studies is to try and link the microscopic characteristics of the material (mineralogy, geochemical properties, microstructure, etc.) to its macroscopic behaviour (swelling properties, etc…).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 353: Symposium – Scientific Basis for Nuclear Waste Management XVIII , 1994 , 221
Copyright
Copyright © Materials Research Society 1995

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References

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