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ASTM Selected Technical Papers
Hydraulic Conductivity and Waste Contaminant Transport in Soil
By
DE Daniel
DE Daniel
1
University of Texas
,
Austin, TX
;
chairman and editor
.
Search for other works by this author on:
SJ Trautwein
SJ Trautwein
2
Trautwein Soils Testing Equipment Company
,
Houston, TX
;
chairman and editor
.
Search for other works by this author on:
ISBN-10:
0-8031-1442-7
ISBN:
978-0-8031-1442-5
No. of Pages:
617
Publisher:
ASTM International
Publication date:
1994

Flexible-wall permeability (hydraulic conductivity) tests are conducted on compacted specimens consisting of 50 percent Class F fly ash with a 50 percent soil admixture (sand with 0, 6.25, 12.5, 18.75, and 25 percent bentonite). All test specimens are back-pressured before permeation with distilled water. Three specimens from each sand-bentonite-fly ash mixture are tested under high (72 or 73) and low (6.1) constant-gradient conditions as well as under constant-flow conditions for a total of 15 tests. Induced hydraulic gradients from the constant-flow tests range from 3.5 to 41. A decrease in permeability with an increase in bentonite content is evident regardless of the test method. However, the permeability is minimized at a bentonite content of 18.75 percent regardless of the test method. The overall lowest permeability value is 1.6 × 10-9 m/s. An increase in hydraulic gradient of 11.9X resulted in a 3.1X to 6.2X decrease in measured permeability values for all test specimens. A significant portion of the difference in measured permeability values is attributed to differences in applied or induced hydraulic gradients regardless of the test method.

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and
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,
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2.
Bergstrom
,
W. R.
and
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,
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,
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, “
Fly Ash Utilization in Soil-Bentonite Slurry Trench Cutoff Walls
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University of Wisconsin
,
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3.
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, ,
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,
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,
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, and
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,
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,
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,
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, and
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,
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,
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5.
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,
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,
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,
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9.
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,
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,
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, “
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,
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,
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, and
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,
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, “
Fly Ash Utilization in Cut-Off Wall Backfill Mixes
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.
11.
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,
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and
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, ,
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,
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, “
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, Ed.,
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,
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12.
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,
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and
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,
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,
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, “
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,”
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,
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,
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,
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, and
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,
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,”
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, No.
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15.
Olson
,
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and
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,
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,
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American Society for Testing and Materials
,
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, pp. 18–64.
16.
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,
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and
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,
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17.
Shackelford
,
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,
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, “
Waste-Soil Interactions that Alter Hydraulic Conductivity
,” Hydraulic Conductivity and Waste Contaminant Transport in Soils, ASTM STP 1142,
Daniel
David E.
and
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, Eds.,
American Society for Testing and Materials
,
Philadelphia
,
1994
.
18.
Standard Methods for the Examination of Water and Wastewater
,
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, 16th Edition,
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,
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, and
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, Eds.,
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,
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19.
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,
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,
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,
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, and
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,
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,
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, “
Geotechnical and Geoenvironmental Properties of Stabilized Lignite Fly Ash
,” Proceedings, Mediterranean Conference on Environmental Geotechnology,
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, May 25–27, 1992,
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,
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20.
Vesperman
,
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,
Edil
,
T. B.
, and
Berthouex
,
P. M.
,
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, “
Permeability of Fly Ash and Fly Ash-Sand Mixtures
,” Hydraulic Barriers in Soil and Rock, ASTM STP 874,
Johnson
A. I.
,
Frobel
R. K.
,
Cavalli
N. J.
, and
Pettersson
C. B.
, Eds.,
American Society for Testing and Materials
,
Philadelphia
, pp. 289–298.
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