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ASTM D6707-06

(Specification)

Standard Specification for Circular-Knit Geotextile for Use in Subsurface Drainage Applications

Standard Specification for Circular-Knit Geotextile for Use in Subsurface Drainage Applications

ABSTRACT
This specification covers circular-knit geotextiles for use on the outside of perforated pipes and Class B geocomposites in subsurface drainage applications. Material covered by this specification comprises Type A and Type B fabric geotextiles, which have been used extensively as filtration geotextiles in combination with subsurface drainage pipes. The geotextile shall be manufactured from polymeric materials by a circular-knit process, which will ensure a consistent, continuous fabric without seams. Tests for water permittivity, apparent opening size, and puncture strength shall be performed and shall conform to the requirements specified. Per service requirement, additional tests for chemical resistance and durability may be performed as well.
SCOPE
1.1 This specification covers circular-knit geotextiles for use on the outside of perforated pipes and Class B geocomposites per Specification D 7001 in drainage applications.
1.2 The tests used to characterize the geotextile are intended to ensure good workmanship and quality, and are not necessarily adequate for design purposes in view of the importance of environmental factors and specific performance objectives. Tests have been selected with essentially neutral aqueous systems in mind. Other tests may be necessary to establish chemical resistance and durability under the conditions of a particular application.
This standard may involve hazardous materials, operations, and equipment. 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 requirements prior to use.

General Information

Status
Historical
Publication Date
31-May-2006
ICS
59.080.70 - Geotextiles
Technical Committee
D35 - Geosynthetics
Drafting Committee
D35.03 - Permeability and Filtration
Current Stage
Ref Project

Relations

Replaces
ASTM D6707-01 - Standard Specification for Circular-Knit Geotextile for Use in Subsurface Drainage Applications
Effective Date
01-Jun-2006
Replaced By
ASTM D6707-06(2011) - Standard Specification for Circular-Knit Geotextile for Use in Subsurface Drainage Applications
Effective Date
01-Jun-2011

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ASTM D6707-06 - Standard Specification for Circular-Knit Geotextile for Use in Subsurface Drainage ApplicationsASTM D6707-06 - Standard Specification for Circular-Knit Geotextile for Use in Subsurface Drainage Applications
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ASTM D6707-06 - Standard Specification for Circular-Knit Geotextile for Use in Subsurface Drainage Applications
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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: D6707 – 06
Standard Specification for
Circular-Knit Geotextile for Use in Subsurface Drainage
1
Applications
This standard is issued under the fixed designation D6707; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope D7001 Specification for Geocomposites for Pavement Edge
Drains and Other High-Flow Applications
1.1 This specification covers circular-knit geotextiles for
use on the outside of perforated pipes and Class B geocom-
3. Terminology
posites per Specification D7001 in drainage applications.
3.1 Definitions of Terms Specific to This Standard:
1.2 The tests used to characterize the geotextile are intended
3.1.1 circular knit—a structure produced by interlooping
to ensure good workmanship and quality, and are not neces-
one or more ends of yarn or comparable material in a
sarily adequate for design purposes in view of the importance
continuously circular orientation around the fabric.
of environmental factors and specific performance objectives.
3.1.2 filtration—the equilibrium soil to geotextile system
Tests have been selected with essentially neutral aqueous
that allows for adequate liquid flow with limited soil loss
systems in mind. Other tests may be necessary to establish
across the plane of the geotextile over the service lifetime
chemical resistance and durability under the conditions of a
compatible with the application under consideration.
particular application.
3.2 Definitions in this standard are in accordance with
1.3 This standard may involve hazardous materials, opera-
Terminology D123 and D4439, unless otherwise specified.
tions, and equipment. This standard does not purport to
address all of the safety concerns, if any, associated with its
4. Classification
use. It is the responsibility of the user of this standard to
4.1 The circular-knit geotextiles covered by this specifica-
establish appropriate safety and health practices and deter-
tion are classified as follows:
mine the applicability of regulatory requirements prior to use.
4.1.1 Type A: fabric
4.1.2 Type H: fabric
2. Referenced Documents
2 4.2 The characteristics of the two types of geotextile are
2.1 ASTM Standards:
given in 8.1 below.
D123 Terminology Relating to Textiles
D4439 Terminology for Geosynthetics
5. Significance and Use
D4491 Test Methods for Water Permeability of Geotextiles
5.1 Circular knit geotextiles have been used extensively for
by Permittivity
many years as filtration geotextiles in combination with sub-
D4751 Test Method for Determining Apparent Opening
surface drainage pipes.
Size of a Geotextile
5.2 The test procedures and recommendations referred to in
D6241 Test Method for the Static Puncture Strength of
this standard are considered adequate to determine the accept-
Geotextiles and Geotextile-Related Products Using a
able performance properties of these geotextiles and are
50-mm Probe
recommended to specifiers and users of these products for
acceptance testing.
1
This specification is under the jurisdiction of ASTM Committee D35 on
Geosynthetics and is the direct responsibility of Subcommittee D35.03 on Perme- 6. Materials and Manufacture
ability and Filtration.
6.1 The geotextile shall be manufactured from polymeric
CurrenteditionapprovedJune1,2006.PublishedJuly2006.Originallyapproved
materials.
in 2001. Last previous edition approved in 2001 as D6707–01. DOI: 10.1520/
D6707-06.
6.2 The geotextiles are manufactured by a circular knit
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
process to ensure a consistent, continuous fabric without seams
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
along its machine direction in order to envelope the perforated
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. pipe without flaws.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D6707 – 06
7. Fabrication Procedures
Test Method Type A Type H
D6241 Puncture 800 min 800 min
7.1 The circular knit geotextiles, when applied to the
strength (N)
perforated tubing, fit snugly and uniformly over the entire
8.1.1 The physical values provided in this standard are not
exterior surface of the pipe.
7.2 If for any reason the circular knitted geotextile fabric intended to address all soil conditions which may be encoun-
becomes damaged, repair of damaged area may be conducted tered.
in the field prior to installation, by wrapping or overlaying the
8.1.2 Specialty circular knit geotextiles ma
...

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SCOPE
1.1 This test method covers a uniform procedure for determining the tear strength of flexible geomembranes internally reinforced with a textile, using the tongue tear method.  
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Standard Test Method for Accelerated Tensile Creep and Creep-Rupture of Geosynthetic Materials Based on Time-Temperature Superposition Using the Stepped Isothermal Method

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Note 1: Currently, SIM testing has focused mainly on woven and knitted geogrids and woven geotextiles made from polyester, aramid, polyaramid, poly-vinyl alcohol (PVA), and polypropylene yarns and narrow strips. Additional correlation studies on other materials are needed.  
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SCOPE
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1.2 The test method is focused on geosynthetic reinforcement materials such as yarns, ribs of geogrids, or narrow geotextile specimens.  
1.3 The SIM tests are laterally unconfined tests based on time-temperature superposition procedures.  
1.4 Tensile tests are to be completed before SIM tests and the results are used to determine the stress levels for subsequent SIM tests defined in terms of the percentage of Ultimate Tensile Strength (TULT). Additionally, the tensile test can be designed to provide estimates of the initial elastic strain distributions appropriate for the SIM results.  
1.5 Ramp and Hold (R+H) tests may be completed in conjunction with SIM tests. They are designed to provide additional estimates of the initial elastic and initial rapid creep strain levels appropriate for the SIM results.  
1.6 This method can be used to establish the sustained load creep and creep-rupture characteristics of a geosynthetic. Results of this method are to be used to augment results of Test Method D5262 and may not be used as the sole basis for determination of long-term creep and creep-rupture behavior of geosynthetic material.  
1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.8 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.9 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM
ASTM D5322-23(Practice)
Standard Practice for Laboratory Immersion Procedures for Evaluating the Chemical Resistance of Geosynthetics to Liquids

SIGNIFICANCE AND USE
4.1 This practice provides a standard immersion procedure for investigating the chemical resistance of a geosynthetic to a liquid waste, leachate, or chemical in a laboratory environment. The conditions specified in this practice are intended both to provide a basis of standardization and to serve as a guide for those wishing to compare or investigate the chemical resistance of a geosynthetic material(s) in a laboratory environment. Practice D5496 can be used should the user need to assess the performance of a geosynthetic in field conditions.  
4.2 This practice is not intended to establish, by itself, the behavior of geosynthetics when exposed to liquids. Such behavior, referred to as chemical resistance, can be defined only in terms of specific chemical solutions and methods of testing and evaluation criteria selected by the user.
SCOPE
1.1 This practice covers laboratory immersion procedures for the testing of geosynthetics for chemical resistance to liquid wastes, prepared chemical solutions, and leachates derived from solid wastes.  
1.2 This standard is not applicable to some geosynthetics such as geosynthetic clay liners (GCLs), because of their composite nature requiring a confining pressure during immersion. However, individual geosynthetic components of the GCL can be tested.  
1.3 This standard was originally developed to supplement and expand EPA 9090 to include all geosynthetics. EPA 9090 has not been updated since 1992.  
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazards statements, see Section 7.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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