ASTM_D_4884_-_D_4884M_-_22.pdf

Designation:D4884/D4884M22Standard Test Method forStrength of Sewn or Bonded Seams of Geotextiles1This standard is issued under the fixed designation D4884/D4884M;the number immediately following the designation indicates theyear of original adoption or,in the 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 test method covers the determination of the factoryand field seam strength of geotextiles,using a wide specimenand wet and dry specimens.1.2 The long-term performance of a seaming technique isnot addressed by this test method.This test method willprovide data to indicate the short-term seam strength that canbe achieved for each particular geotextile and seam assemblyconstruction.To assess the long-term performance of a seam-ing technique,it is possible to use Practice D6389,using thistest method to determine the anticipated strength reduction inthe initial,short-term wide-width tensile strength(Test MethodD4595)results.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system are not necessarily exact equivalents;therefore,toensure conformance with the standard,each system shall beused independently of the other,and values from the twosystems shall not be combined.1.4 This standard does not purport to address all of thesafety concerns,if any,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 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:2D76/D76M Specification for Tensile Testing Machines forTextilesD1776/D1776M Practice for Conditioning and Testing Tex-tilesD1777 Test Method for Thickness of Textile MaterialsD4439 Terminology for GeosyntheticsD4595 Test Method for Tensile Properties of Geotextiles bythe Wide-Width Strip MethodD6389 Practice for Tests to Evaluate the Chemical Resis-tance of Geotextiles to LiquidsE178 Practice for Dealing With Outlying ObservationsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 Federal Standard:3Fed.Std.No.751a Stitches,Seams,and Stitchings3.Terminology3.1 For definitions of terms relating to geotextiles,refer toTerminology D4439.3.2 Definitions of Terms Specific to This Standard:3.2.1 adhered seam,nin geotextiles,a seam made by theapplication of an adhesive.3.2.2 seam weld,nthe process by which a seam is formedthrough the thermal bonding of separate layers of geotextile.3.2.3 selvage,nthe woven edge portion of a geotextileparallel to the machine direction.3.2.4 sewing thread,na flexible,small diameter yarn orstrand,usually treated with a surface coating,or lubricant,orboth,intended to be used to stitch one or more pieces ofmaterial or an object to a material.3.2.5 stitch,nthe repeated unit formed by the sewingthread in the production of seams in a sewn geotextile(see Fed.Std.No.751a).4.Summary of Test Method4.1 Material is divided into lots and a lot sample taken asdescribed in an applicable material specification,or as agreedupon between the purchaser and the supplier.1This test method is under the jurisdiction of ASTM Committee D35 onGeosynthetics and is the direct responsibility of Subcommittee D35.01 on Mechani-cal Properties.Current edition approved July 1,2022.Published August 2022.Originallyapproved in 1989.Last previous edition approved in 2014 as D4884/D4884M 14a.DOI:10.1520/D4884_D4884M-22.2For referenced ASTM standards,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.3Available from DLA Document Services,Building 4/D,700 Robbins Ave.,Philadelphia,PA 19111-5094,http:/quicksearch.dla.mil.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.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.14.2 Specimens with seams are prepared from the samplesper applicable specification or prior agreement between thepurchaser and the supplier;otherwise,prepare at least six testspecimens.4.3 A specimen is placed in the test machine with a seam200 mm 8 in.wid