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ASTM D6707-06(2011)

(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 D7001 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.
1.3 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-2011
ICS
59.080.70 - Geotextiles
Technical Committee
D35 - Geosynthetics
Drafting Committee
D35.03 - Permeability and Filtration
Current Stage
Ref Project

Relations

Replaces
ASTM D6707-06 - Standard Specification for Circular-Knit Geotextile for Use in Subsurface Drainage Applications
Effective Date
01-Jun-2011
Replaced By
ASTM D6707/D6707M-06(2016)e1 - Standard Specification for Circular-Knit Geotextile for Use in Subsurface Drainage Applications
Effective Date
01-Jan-2016

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ASTM D6707-06(2011) - Standard Specification for Circular-Knit Geotextile for Use in Subsurface Drainage ApplicationsASTM D6707-06(2011) - Standard Specification for Circular-Knit Geotextile for Use in Subsurface Drainage Applications
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ASTM D6707-06(2011) - 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(Reapproved 2011)
Standard Specification for
Circular-Knit Geotextile for Use in Subsurface Drainage
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 3. Terminology
1.1 This specification covers circular-knit geotextiles for 3.1 Definitions of Terms Specific to This Standard:
use on the outside of perforated pipes and Class B geocom- 3.1.1 circular knit—a structure produced by interlooping
posites per Specification D7001 in drainage applications. one or more ends of yarn or comparable material in a
continuously circular orientation around the fabric.
1.2 The tests used to characterize the geotextile are intended
3.1.2 filtration—the equilibrium soil to geotextile system
to ensure good workmanship and quality, and are not neces-
that allows for adequate liquid flow with limited soil loss
sarily adequate for design purposes in view of the importance
across the plane of the geotextile over the service lifetime
of environmental factors and specific performance objectives.
compatible with the application under consideration.
Tests have been selected with essentially neutral aqueous
systems in mind. Other tests may be necessary to establish
3.2 Definitions in this standard are in accordance with
chemical resistance and durability under the conditions of a
Terminology D123 and D4439, unless otherwise specified.
particular application.
4. Classification
1.3 This standard may involve hazardous materials,
4.1 The circular-knit geotextiles covered by this specifica-
operations, and equipment. This standard does not purport to
tion are classified as follows:
address all of the safety concerns, if any, associated with its
4.1.1 Type A: fabric
use. It is the responsibility of the user of this standard to
4.1.2 Type H: fabric
establish appropriate safety and health practices and deter-
mine the applicability of regulatory requirements prior to use. 4.2 The characteristics of the two types of geotextile are
given in 8.1 below.
2. Referenced Documents
5. Significance and Use
2.1 ASTM Standards:
5.1 Circular knit geotextiles have been used extensively for
D123 Terminology Relating to Textiles
many years as filtration geotextiles in combination with sub-
D4439 Terminology for Geosynthetics
surface drainage pipes.
D4491 Test Methods for Water Permeability of Geotextiles
5.2 The test procedures and recommendations referred to in
by Permittivity
this standard are considered adequate to determine the accept-
D4751 Test Method for DeterminingApparent Opening Size
able performance properties of these geotextiles and are
of a Geotextile
recommended to specifiers and users of these products for
D6241 Test Method for the Static Puncture Strength of
acceptance testing.
Geotextiles and Geotextile-Related Products Using a
50-mm Probe
6. Materials and Manufacture
D7001 Specification for Geocomposites for Pavement Edge
6.1 The geotextile shall be manufactured from polymeric
Drains and Other High-Flow Applications
materials.
6.2 The geotextiles are manufactured by a circular knit
This specification is under the jurisdiction of ASTM Committee D35 on
process to ensure a consistent, continuous fabric without seams
Geosynthetics and is the direct responsibility of Subcommittee D35.03 on Perme-
along its machine direction in order to envelope the perforated
ability and Filtration.
pipe wit
...

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5.1 Since tear resistance may be affected to a large degree by mechanical fibering of the membrane under stress, as well as by stress distribution, strain rate, and size of specimen, the results obtained in a tear resistance test can only be regarded as a measure of the resistance under the conditions of that particular test and not necessarily as having any direct relation to service value. This test method measures the force required to tear a reinforced geomembrane along a reasonably defined course such as that the tear propagates across the width of the specimen. The values may vary between types of reinforcement used within a geomembrane.  
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SCOPE
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SCOPE
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4.2 This standard arose from the need for a destructive test method for evaluating seams of reinforced geomembranes. Standards written for destructive testing of nonreinforced geomembranes do not include all break codes (Fig. 1) applicable to reinforced geomembranes.
FIG. 1 Break Codes for Dual Hot Wedge and Hot Air Seams of Reinforced Geomembranes Tested for Seam Strength in Shear and Peel Modes  
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SCOPE
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5.1 This test method is recommended for the evaluation of the performance of water-saturated soil-geotextile systems under unidirectional flow conditions. The results obtained may be used as an indication of the compatibility of the soil-geotextile system with respect to both particle retention and flow capacity.  
5.2 This test method is intended to evaluate the performance of specific on-site soils and geotextiles at the design stage of a project, or to provide qualitative data that may help identify causes of failure (for example, clogging, particle loss). It is not appropriate for acceptance testing of geotextiles. It is also improper to utilize the results from this test for job specifications or manufacturers' certifications.  
5.3 This test method is intended for site-specific investigation therefore is not an index property of the geotextile, and thus is not intended to be requested of the manufacturer or supplier of the geotextile.
SCOPE
1.1 This test method covers performance tests applicable for determining the compatibility of geotextiles with various types of water-saturated soils under unidirectional flow conditions.  
1.2 Two evaluation methods may be used to investigate soil-geotextile filtration behavior, depending on the soil type:  
1.2.1 For soils with a plasticity index lower than 5, the systems compatibility shall be evaluated per this standard.  
1.2.2 For soils with a plasticity index of 5 or more, it is recommended to use Test Method D5567 (‘HCR,’ Hydraulic Conductivity Ratio) instead of this test method.  
1.2.3 If the plasticity index of the soil is close to 5, the involved parties shall agree on the selection of the appropriate method prior to conducting the test. This task may require comparison of the permeability of the soil-geotextile system to the detection limits of the HCR and Gradient Ratio Test (GRT) test apparatus being used.  
1.3 The values stated in SI units are to be regarded as standard. The values in parentheses are for information only.  
1.4 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.  
1.5 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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  • Standard
    8 pages
    English language
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