High-Density Bentonite Slurry for Seepage Barriers
Publication: Journal of Materials in Civil Engineering
Volume 17, Issue 2
Abstract
Bentonite slurry without cement is used for seepage barriers such as slurry trenches or grouting, but the sodium-bentonite content in the slurry cannot be increased to more than . Slurry with such low bentonite content is not enough to achieve impermeability of the slurry walls or grouting. Using hydrophilic solvents such as ethanol can depress the bentonite swelling, and the liquid limit can be decreased to less than 100%. Therefore ethanol is used for the mixing liquid when preparing the slurry, and the bentonite concentration can be increased to more than in the slurry state. Ethanol/bentonite slurry can be grouted to small spaces with sufficient cutoff performance. This paper reports the high potential of ethanol/bentonite slurry for seepage barriers based on the following characteristics: low permeability, smooth groutability, and sealing ability with the substitution of ethanol with water. The high potential of ethanol/bentonite slurry for grouting was confirmed through the filling tank test.
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© 2005 ASCE.
History
Received: Dec 31, 2002
Accepted: Jul 26, 2004
Published online: Apr 1, 2005
Published in print: Apr 2005
Notes
Note. Associate Editor: Braj P. Sinha
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