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The Leaching Of The Reactive Powder Concretes: Results On Transfer Properties

Published online by Cambridge University Press:  10 February 2011

V. Matite  and
M. Moranville
V. Matite
Affiliation:
Laboratoire de Mécanique et Technologie, ENS Cachan, 94235 Cachan CEDEX, France Bouygues, Direction Scientifique, Challenger, 78061 St-Quentin-Yvelines CEDEX, France Laboratoire d'études des matériaux, CEA Saclay, 91191 Gif-sur-Yvette, France
M. Moranville
Affiliation:
Laboratoire de Mécanique et Technologie, ENS Cachan, 94235 Cachan CEDEX, France
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Abstract

The properties of concrete can be altered in aggressive media such as pure water. A leaching test was performed for Reactive Powder Concretes (RPC) in order to evaluate their durability when used as storage of nuclear wastes. Emphasis is placed on the changes of their microstructure, on the tritium diffusion coefficient and on the porosity after leaching. Using mainly non destructive techniques such as SEM, BET and diffusion cell, we found that the leaching affects the RPC microstructure, particularly the anhydrous cement grains. The tritium diffusion coefficient, even lower than that of granite, is however ten times higher after a three month-leaching.

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References

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