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A Method for Adjusting Strain-Rates to Obtain Pore Pressure Measurements in Triaxial Shear Tests / Willard Ellis, W. G. Holtz

Conference Author
Papers on Soils 1959 Meetings (1959 : Atlantic City, N. J.)
Physical Description
1 online resource (16 pages) : illustrations, figures, tables
Additional Creators
Ellis, Willard, Holtz, W. G., American Society for Testing and Materials, and ASTM International
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Summary
Many triaxial shear tests are performed in the Bureau of Reclamation laboratory on partially saturated soils for embankments and partially saturated to saturated soils for foundation design purposes. The method of design used requires that the shear values obtained be based on effective stresses which exist within the shear specimens during the test, rather than stresses which are applied to the exterior of the specimens. This method, therefore, requires that accurate pore-fluid pressure measurements be made during the shear tests, so that the effective stresses can be determined. The pore pressures are usually measured through special end plates when conducting the tests for project works. In using the method, it is necessary that the rate of testing be adjusted so that equalization of pore pressures throughout the specimens are obtained. This paper presents a procedure for establishing the maximum rate of axial strain compatible with accurate pore pressure measurements. The procedure is based upon establishing a continuous relationship of the pattern between the pore pressures computed from volume changes and the pore pressures measured during the test.
Dates of Publication and/or Sequential Designation
Volume 1960, Issue 254 (January 1960)
Subject(s)
ISBN
9780803159525 (e-ISBN)
9780803161061
0803161069
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 5.
Other Forms
Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
Full text article also available for purchase.
Also available in PDF edition.
Reproduction Note
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1960. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
Technical Details
Mode of access: World Wide Web.
Source of Acquisition
ASTM International PDF Purchase price USD25.
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