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Consolidation of Ethanol/Bentonite Slurry Injected in a Planar Fracture; Mathematical Modelling and Experiment

Published online by Cambridge University Press:  21 March 2011

Hiroyasu Takase ,
Kengo Iwasa ,
Takashi Ishii ,
Hiroyoshi Ueda ,
Yasushi Sakabe  and
Katsuhiko Ishiguro
Hiroyasu Takase
Affiliation:
Quintessa Japan
Kengo Iwasa
Affiliation:
Shimizu Corporation, Japan
Takashi Ishii
Affiliation:
Shimizu Corporation, Japan
Hiroyoshi Ueda
Affiliation:
Nuclear Waste Management Organization of Japan
Yasushi Sakabe
Affiliation:
Nuclear Waste Management Organization of Japan
Katsuhiko Ishiguro
Affiliation:
Nuclear Waste Management Organization of Japan
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Abstract

Ethanol/bentonite slurry is an alternative to the conventional cement-based material that may cause chemical disturbances to the host rock and the buffer material. In this study we carried out an experiment in which the ethanol/bentonite slurry was injected into a planar synthetic fracture at a constant rate. The pressure build-up due to the increase in viscosity of the bentonite ethanol slurry was observed and, eventually, consolidation of the slurry led to termination of the injection. A mathematical model was also developed to simulate the advection, dispersion and matrix dispersion of ethanol that contributed to the increase in viscosity of the ethanol/bentonite slurry, together with a Stoke's flow of the slurry before consolidation. Furthermore, applicability of the ethanol/bentonite slurry as a grouting material in a range of geological settings is discussed based on the result of a case study using the same model.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 932: Symposium – Scientific Basis for Nuclear Waste Management XXIX , 2006 , 107.1
Copyright
Copyright © Materials Research Society 2006

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References

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