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Field Test of Ethanol/Bentonite Slurry Grouting into Rock Fracture

Published online by Cambridge University Press:  21 March 2011

Motoyuki Asada ,
Hitoshi Nakashima ,
Takashi Ishii  and
Sumio Horiuchi
Motoyuki Asada
Affiliation:
Institute of Technology, Shimizu Corporation, Echujima 3-4-17, Koto-ku, Tokyo 135-8530, Japan
Hitoshi Nakashima
Affiliation:
Institute of Technology, Shimizu Corporation, Echujima 3-4-17, Koto-ku, Tokyo 135-8530, Japan
Takashi Ishii
Affiliation:
Institute of Technology, Shimizu Corporation, Echujima 3-4-17, Koto-ku, Tokyo 135-8530, Japan
Sumio Horiuchi
Affiliation:
Institute of Technology, Shimizu Corporation, Echujima 3-4-17, Koto-ku, Tokyo 135-8530, Japan
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Abstract

Crystalline rocks have fractures which may cause unexpected routes of groundwater seepage. Cement grouting is one of the most effective methods to minimize seepage; however, cement materials may not be suitable for the purpose of extra-long durability, because cement is neutralized or degraded by chemical and physical influence of chemical reaction.

Natural clay like bentonite is one of the most promising materials for seepage barrier; however, water/bentonite grout is so viscous that enough amount of bentonite can not be grouted into rock fractures. To increase bentonite content in grout with low viscosity, the utilization of ethanol as a mixing liquid was studied. Ethanol suppresses bentonite swelling, and more bentonite can be injected more than that of water/bentonite slurry. In this paper, grouting into in-situ rock mass fracture from the ground surface was tested to investigate the barrier performance and workability of ethanol/bentonite slurry as a grouting material.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 932: Symposium – Scientific Basis for Nuclear Waste Management XXIX , 2006 , 115.1
Copyright
Copyright © Materials Research Society 2006

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References

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