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Title: COMPACTION CONTROL CRITERIA FOR CLAY HYDRAULIC BARRIERS
Accession Number: 00677576
Record Type: Component
Availability: Find a library where document is available Abstract: Compacted clays are commonly used as hydraulic barriers. In the construction of a clay hydraulic barrier it is important to use a water content-dry unit weight criterion that results in low hydraulic conductivity. Recently several compaction criteria have been proposed for the construction of soil hydraulic barriers. Discrepancies exist, however, in the acceptable water content-dry unit weight zones defined by these criteria. Three of these criteria are reviewed and compared. The advantages and disadvantages of each criterion are discussed with emphasis on efficiency, effectiveness, and practicality of use during construction. An evaluation is presented that suggests that a criterion based on achieving a minimum initial degree of saturation (i.e., the leftmost boundary of the water content-dry unit weight zone is a contour of constant degree of saturation) has desirable attributes and has several advantages over the other approaches. Laboratory and field data on compaction and hydraulic conductivity of several clay soils are examined to evaluate the validity of the degree-of-saturation approach. The data show that this approach provides good control over the quality of compacted clays in the field and is more accommodating to natural variations in soil composition and compaction characteristics than are the other approaches. A case history is presented that illustrates the degree-of-saturation compaction criterion.
Supplemental Notes: This paper appears in Transportation Research Record No. 1462, Compaction of Difficult Soils and Resilient Modulus Testing. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Monograph Accession #: 01495760
Language: English
Authors: Othman, Majdi ALuettich, Scott MPagination: p. 28-35
Publication Date: 1994
Serial: ISBN: 0309060680
Features: Figures
(10)
; References
(20)
; Tables
(1)
TRT Terms: Uncontrolled Terms: Subject Areas: Geotechnology; Highways; I42: Soil Mechanics
Files: TRIS, TRB
Created Date: May 2 1995 12:00AM
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