Journal ArticleDOI
Hydraulic conductivity of thirteen compacted clays
Craig H. Benson,John M. Trast +1 more
TLDR
In this article, hydraulic conductivity tests were conducted on thirteen compacted clay-ey soils being used for compacted Clay liners at landfills throughout the United States The soils were prepared to various molding water contents and then compacted and permeated in the laboratory Results of the tests show that for all of the soils, zones exist in the compaction plane (i.e., dry unit weight vs water content) where the hydraulic conductivities is similar These zones fall roughly parallel to contours of constant initial saturation (degree ofsaturation at compaction), with lower hydraulic conductAbstract:
Hydraulic conductivity tests were conducted on thirteen compacted clayey soils being used for compacted clay liners at landfills throughout the United States The soils were prepared to various molding water contents and then compacted and permeated in the laboratory Results of the tests show that for all of the soils, zones exist in the compaction plane (ie, dry unit weight vs water content) where the hydraulic conductivity is similar These zones fall roughly parallel to contours of constant initial saturation (degree ofsaturation at compaction), with lower hydraulic conductivities generally occurring for conditions corresponding to higher initial saturation Wet of the line of optimums, lower hydraulic conductivity is also attained for soils that are more plastic and have a greater quantity of fines A regression equation was developed from the data to estimate hydraulic conductivity given the initial saturation, compactive effort, plasticity index, and clay contentread more
Citations
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Journal ArticleDOI
Electrical resistivity of compacted clays
TL;DR: In this paper, the relationship between electrical resistivity, compaction conditions, hydraulic conductivity, and index properties is reported for ten soils that have been used for constructing compacted soil liners having low field-scale hydraulic conductivities ( < 1 × 10 −9 m/s).
Journal ArticleDOI
Permeability and petrophysical properties of 30 natural mudstones
Yunlai Yang,Andrew C. Aplin +1 more
TL;DR: In this article, the authors used the data to calibrate two permeability models, the Yang-Aplin model and the Kozeny-Carman model, for 30 deeply buried mudstones with different effective consolidation stresses and a 30,000 mg L−1 NaCl solution.
Journal ArticleDOI
Field Performance of Compacted Clay Liners
TL;DR: In this article, a database consisting of 85 full-scale compacted clay liners was assembled to evaluate field hydraulic conductivity KF, and a large-scale field hydraulicconductivity tests were conducted on each liner.
Journal ArticleDOI
Predicting the impact of biochar additions on soil hydraulic properties
TL;DR: The developed model utilizes soil texture pedotransfer functions for predicting agricultural soil Ksat as a function of soil texture and accurately predicted the direction of the Ksat influence, which represents the first step to a unified theory behind the impact of biochar additions on soil saturated conductivity.
Journal ArticleDOI
Soil-Water Characteristic Curves for Compacted Clays
TL;DR: In this article, the shape of the SWCC depends on compaction water content and compactive effort, and compaction effort is more important than water content, while compaction at higher water content or with greater effort results in larger air entry suction and a steeper SWCC.
References
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Book
Applied Regression Analysis
Norman R. Draper,Harry Smith +1 more
TL;DR: In this article, the Straight Line Case is used to fit a straight line by least squares, and the Durbin-Watson Test is used for checking the straight line fit.
Journal ArticleDOI
Mechanisms Controlling the Permeability of Clays
TL;DR: In this paper, Terzaghi's theory of one-dimensional consolidation is used to calculate the coefficient of permeability for smectite, illite, and kaolinite.
Journal ArticleDOI
The Structure of Compacted Clays
TL;DR: In this paper, the authors describe the nature of clay structure, a term referring to the arrangement of particles and the electrical forces acting between them, from the principles of colloid chemistry and crystal chemistry.