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ASTM Selected Technical Papers
Hydraulic Barriers in Soil and Rock
By
AI Johnson
AI Johnson
1
Woodward-Clyde Consultants
,
Denver, CO 80111
;
symposium cochairman and coeditor
.
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RK Frobel
RK Frobel
2
U.S. Bureau of Reclamation
,
Denver, CO 80225
;
symposium cochairman and coeditor
.
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NJ Cavalli
NJ Cavalli
3
ICOS Corporation of America
,
New York, NY 10019
;
session cochairman and coeditor
.
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CB Pettersson
CB Pettersson
4
Brown and Root, Inc.
,
Houston, TX 77001
;
session cochairman and coeditor
.
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ISBN-10:
0-8031-0417-0
ISBN:
978-0-8031-0417-4
No. of Pages:
340
Publisher:
ASTM International
Publication date:
1985

Compacted soil liners have been used to retard leakage of fluids from burial sites. If allowed to desiccate, such liners may shrink, crack, and lose their integrity. As a result of the expense and control problems associated with field tests, an initial laboratory study was made of shrinkage, cracking tendency, and hydraulic conductivity of various compacted clay/sand mixtures. The study showed that desiccation shrinkage increased linearly with compaction water content and was unaffected by density. Soaking prior to desiccation increased strains markedly for specimens compacted dry of optimum. Shrinkage strains greater than 10% should cause serious problems in the field. Clay/sand mixtures were prepared which were crack resistant and which had low hydraulic conductivities.

1.
Bishop
,
A. W.
,
Alpan
,
I.
,
Blight
,
G. E.
, and
Donald
,
I. B.
in
Proceedings
,
American Society for Civil Engineers Research Conference on the Shear Strength of Cohesive Soils
,
ASCE
,
New York
, pp. 503-532.
2.
Bishop
,
A. W.
and
Donald
,
I. B.
in
Proceedings
,
Fifth International Conference on Soil Mechanics and Foundation Engineering
, Vol.
1
,
Dunod, Paris
, pp. 13-22.
3.
Kleppe
,
J. H.
, “
Desiccation Cracking of Cohesive Soil
,” M.S. thesis,
University of Texas
, Austin,
1981
.
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