ASTM D6707-06(2011)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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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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