1、Designation:D6707/D6707M06(Reapproved 2019)Standard Specification forCircular-Knit Geotextile for Use in Subsurface DrainageApplications1This standard is issued under the fixed designation D6707/D6707M;the number immediately following the designation indicates theyear of original adoption or,in the
2、case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers circular-knit geotextiles foruse on the outside of perforated pipes
3、and Class B geocom-posites per Specification D7001 in drainage applications.1.2 The tests used to characterize the geotextile are intendedto ensure good workmanship and quality,and are not neces-sarily adequate for design purposes in view of the importanceof environmental factors and specific perfor
4、mance objectives.Tests have been selected with essentially neutral aqueoussystems in mind.Other tests may be necessary to establishchemical resistance and durability under the conditions of aparticular application.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separat
5、ely as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 This standard does not purport to address all of thesafety concerns,if an
6、y,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally
7、 recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Re
8、lating to TextilesD4439 Terminology for GeosyntheticsD4491/D4491M Test Methods for Water Permeability ofGeotextiles by PermittivityD4751 Test Methods for Determining Apparent OpeningSize of a GeotextileD6241 Test Method for Static Puncture Strength of Geotex-tiles and Geotextile-Related Products Usi
9、ng a 50-mmProbeD7001 Specification for Geocomposites for Pavement EdgeDrains and Other High-Flow Applications3.Terminology3.1 DefinitionsFor definitions of terms related togeosynthetics,refer to Terminology D4439.3.2 Definitions of Terms Specific to This Standard:3.2.1 circular knit,adja structure p
10、roduced by interloop-ing one or more ends of yarn or comparable material in acontinuously circular orientation around the fabric.3.2.2 filtration,nthe equilibrium soil to geotextile systemthat allows for adequate liquid flow with limited soil lossacross the plane of the geotextile over the service l
11、ifetimecompatible with the application under consideration.3.3 Definitions in this specification are in accordance withTerminologies D123 and D4439,unless otherwise specified.4.Classification4.1 The circular-knit geotextiles covered by this specifica-tion are classified as follows:4.1.1 Type A:fabri
12、c.4.1.2 Type H:fabric.4.2 The characteristics of the two types of geotextile aregiven in 8.1 below.5.Significance and Use5.1 Circular-knit geotextiles have been used extensively formany years as filtration geotextiles in combination with sub-surface drainage pipes.5.2 The test procedures and recomme
13、ndations referred to inthis standard are considered adequate to determine the accept-able performance properties of these geotextiles,and arerecommended to specifiers and users of these products foracceptance testing.1This specification is under the jurisdiction of ASTM Committee D35 onGeosynthetics
14、 and is the direct responsibility of Subcommittee D35.06 on Geosyn-thetic Specifications.Current edition approved Feb.15,2019.Published February 2019.Originallyapproved in 2001.Last previous edition approved in 2016 as D6707/D6707M 06(2016)1.DOI:10.1520/D6707_D6707M-06R19.2For referenced ASTM standa
15、rds,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-295
16、9.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 6.Materials and Manufacture6.1 The geotextile shall be manufactured from polymericmaterials.6.2 The geotextiles are manufactured by a circular knitprocess to ensure a co