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ASTM D6707-01

(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

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1.1 This specification covers circular-knit geotextiles for use on the outside of perforated pipes 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
09-Sep-2001
ICS
59.080.70 - Geotextiles
Technical Committee
D35 - Geosynthetics
Drafting Committee
D35.03 - Permeability and Filtration
Current Stage
Ref Project

Relations

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

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ASTM D6707-01 - Standard Specification for Circular-Knit Geotextile for Use in Subsurface Drainage ApplicationsASTM D6707-01 - Standard Specification for Circular-Knit Geotextile for Use in Subsurface Drainage Applications
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ASTM D6707-01 - 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D 6707 – 01
Standard Specification for
Circular-Knit Geotextile for Use in Subsurface Drainage
Applications
This standard is issued under the fixed designation D 6707; 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 across the plane of the geotextile over the service lifetime
compatible with the application under consideration.
1.1 This specification covers circular-knit geotextiles for
3.2 Definitions in this standard are in accordance with
use on the outside of perforated pipes in drainage applications.
Terminology D 123 and D 4439, unless otherwise specified.
1.2 The tests used to characterize the geotextile are intended
to ensure good workmanship and quality, and are not neces-
4. Classification
sarily adequate for design purposes in view of the importance
4.1 The circular-knit geotextiles covered by this specifica-
of environmental factors and specific performance objectives.
tion are classified as follows:
Tests have been selected with essentially neutral aqueous
4.1.1 Type A: fabric
systems in mind. Other tests may be necessary to establish
4.1.2 Type H: fabric
chemical resistance and durability under the conditions of a
4.2 The characteristics of the two types of geotextile are
particular application.
given in 8.1 below.
1.3 This standard may involve hazardous materials, opera-
tions, and equipment. This standard does not purport to
5. Significance and Use
address all of the safety concerns, if any, associated with its
5.1 Circular knit geotextiles have been used extensively for
use. It is the responsibility of the user of this standard to
many years as filtration geotextiles in combination with sub-
establish appropriate safety and health practices and deter-
surface drainage pipes.
mine the applicability of regulatory requirements prior to use.
5.2 The test procedures and recommendations referred to in
2. Referenced Documents this standard are considered adequate to determine the accept-
able performance properties of these geotextiles and are
2.1 ASTM Standards:
recommended to specifiers and users of these products for
D 4491 Test Methods for Water Permeability of Geotextiles
2 acceptance testing.
by Permittivity
D 4751 Test Method for Determining Apparent Opening
6. Materials and Manufacture
Size of a Geotextile
6.1 The geotextile shall be manufactured from polymeric
D 6241 Test Method for the Static Puncture Strength of
materials.
Geotextiles and Geotextile Related Products Using a
2 6.2 The geotextiles are manufactured by a circular knit
50-mm Probe
process to ensure a consistent, continuous fabric without seams
3. Terminology along its machine direction in order to envelope the perforated
pipe without flaws.
3.1 Definitions of Terms Specific to This Standard:
3.1.1 circular knit—a structure produced by interlooping
7. Fabrication Procedures
one or more ends of yarn or comparable material in a
7.1 The circular knit geotextiles, when applied to the
continuously circular orientation around the fabric.
perforated tubing, fit snugly and uniformly over the entire
3.1.2 filtration—the equilibrium
...

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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.  
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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.  
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5.1 The increased use of geomembranes as barrier materials to restrict liquid or gas movement, and the common use of dual-track seams in joining these sheets, has created a need for a standard nondestructive test by which the quality of the seams can be assessed for continuity and watertightness. The test is not intended to provide any indication of the physical strength of the seam.  
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Note 1: Differences may exist between ultrasonic measurements and measurements made using other methods due to differences in test conditions such as pressure applied and probe dimensions. An example is ultrasonic and mechanical thickness measurements.  
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1.1 This practice provides a summary of equipment and procedures for ultrasonic testing of geomembranes using the pulse echo method.  
1.2 Ultrasonic wave propagation in solid materials is correlated to physical and mechanical properties and condition of the materials. In ultrasonic testing, two wave propagation characteristics are commonly determined: velocity (based on wave travel time measurements) and attenuation (based on wave amplitude measurements). Velocity of wave propagation is used to determine thickness, density, and elastic properties of materials. Attenuation of waves in solid materials is used to determine microstructural properties of the materials. In addition, frequency characteristics of waves are analyzed to investigate the properties of a test material. Travel time, amplitude, and frequency distribution measurements are used to assess the condition of materials to identify damage and defects in solid materials. Ultrasonic measurements are used to determine the nature of materials/media in contact with a test specimen as well. Measurements are conducted in the time-domain (time versus amplitude) or frequency-domain (frequency versus amplitude).  
1.3 Measurements of one or more ultrasonic wave transmission characteristics are made based on the requirements of the specific testing program.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development ...

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