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ASTM D6243-06

(Test Method)

Standard Test Method for Determining the Internal and Interface Shear Resistance of Geosynthetic Clay Liner by the Direct Shear Method

Standard Test Method for Determining the Internal and Interface Shear Resistance of Geosynthetic Clay Liner by the Direct Shear Method

SCOPE
1.1 This test method covers a procedure for determining the internal shear resistance of a Geosynthetic Clay Liner (GCL) or the interface shear resistance between the GCL and an adjacent material under a constant rate of displacement or constant stress.
1.2 This test method is intended to indicate the performance of the selected specimen by attempting to model certain field conditions.
1.3 This test method is applicable to all GCLs. Remolded or undisturbed soil samples can be used in the test device.
1.4 This test method is not suited for the development of exact stress-strain relationships within the test specimen due to the nonuniform distribution of shearing forces and displacement.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
14-Jul-2006
ICS
19.060 - Mechanical testing
Technical Committee
D35 - Geosynthetics
Drafting Committee
D35.04 - Geosynthetic Clay Liners
Current Stage
Ref Project

Relations

Replaces
ASTM D6243-98 - Standard Test Method for Determining the Internal and Interface Shear Resistance of Geosynthetic Clay Liner by the Direct Shear Method
Effective Date
15-Jul-2006
Replaced By
ASTM D6243-08 - Standard Test Method for Determining the Internal and Interface Shear Resistance of Geosynthetic Clay Liner by the Direct Shear Method
Effective Date
01-Jul-2008

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ASTM D6243-06 - Standard Test Method for Determining the Internal and Interface Shear Resistance of Geosynthetic Clay Liner by the Direct Shear MethodASTM D6243-06 - Standard Test Method for Determining the Internal and Interface Shear Resistance of Geosynthetic Clay Liner by the Direct Shear Method
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ASTM D6243-06 - Standard Test Method for Determining the Internal and Interface Shear Resistance of Geosynthetic Clay Liner by the Direct Shear Method
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D6243–06
Standard Test Method for
Determining the Internal and Interface Shear Resistance of
1
Geosynthetic Clay Liner by the Direct Shear Method
This standard is issued under the fixed designation D 6243; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope D 1557 Test Methods for Laboratory Compaction Charac-
3
teristics of Soil Using Modified Effort (56,000 ft-lbf/ft
1.1 This test method covers a procedure for determining the
3
(2,700 kN-m/m ))
internalshearresistanceofaGeosyntheticClayLiner(GCL)or
D 2435 Test Methods for One-Dimensional Consolidation
the interface shear resistance between the GCLand an adjacent
Properties of Soils Using Incremental Loading
material under a constant rate of displacement or constant
D 3080 Test Method for Direct Shear Test of Soils Under
stress.
Consolidated Drained Conditions
1.2 This test method is intended to indicate the performance
D 3740 Practice for Minimum Requirements for Agencies
of the selected specimen by attempting to model certain field
Engaged in the Testing and/or Inspection of Soil and Rock
conditions.
as Used in Engineering Design and Construction
1.3 This test method is applicable to all GCLs. Remolded or
D 4439 Terminology for Geosynthetics
undisturbed soil samples can be used in the test device.
D 6072 Guide for Obtaining Samples of Geosynthetic Clay
1.4 This test method is not suited for the development of
Liners
exact stress-strain relationships within the test specimen due to
the nonuniform distribution of shearing forces and displace-
3. Terminology
ment.
3.1 Definitions—For definitions of terms relating to soil and
1.5 The values stated in SI units are to be regarded as the
rock, refer to Terminology D 653. For definitions of term
standard. The values given in parentheses are for information
relating to GCLs, refer to Terminology D 4439.
only.
3.2 Definitions of Terms Specific to This Standard:
1.6 This standard does not purport to address all of the
3.2.1 adhesion, c , n—the shearing resistance between two
a
safety concerns, if any, associated with its use. It is the
unlike materials under zero normal stress.
responsibility of the user of this standard to establish appro-
3.2.2 angle of friction, n—(angle of friction of a material or
priate safety and health practices and determine the applica-
between two materials, °,) the angle whose tangent is the ratio
bility of regulatory limitations prior to use.
between the limiting value of the shear stress that resists
2. Referenced Documents slippage internal to a body or between two solid bodies at rest
2 with respect to each other and the normal stress across the
2.1 ASTM Standards:
contact surface.
D 653 Terminology Relating to Soil, Rock, and Contained
3.2.3 atmosphere for testing geosynthetics, n—air main-
Fluids
tained at a relative humidity of between 50 and 70 % and
D 698 Test Methods for Laboratory Compaction Character-
3
temperature of 21 6 2°C (70 6 4°F).
istics of Soil Using Standard Effort (12,400 ft-lbf/ft (600
3
3.2.4 coeffıcient of friction, n—a constant proportionality
kN-m/m ))
factor relating shear to normal stress for a defined failure
condition.
3.2.5 cohesion c, n—shear strength of material, or the
1
This test method is under the jurisdiction of ASTM Committee D35 on
interface between two materials, at zero normal stress; the
Geosynthetics and is the direct responsibility of Subcommittee D35.04 on Geosyn-
component of the shear strength indicated by the term c,in
thetic Clay Liners.
Coulomb’s equation t =c + s tan (f).
Current edition approved July 15, 2006. Published October 2006. Originally
n
approved in 1998. Last previous edition approved in 1998 as D 6243–98.
3.2.6 direct shear friction test, n—for GCLs, a procedure in
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
which the internal GCL or the interface between a GCL and
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
any other surface, under a constant normal stress specified by
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. the user, is stressed to failure by the relative movement of one
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D6243–06
user must furnish the soil sample, soil parameters, and direct shear test
surface against the other for interface strength and by internal
parameters.
shear for internal strength.
NOTE 2—Testing under this test method should be performed
...

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