ASTM_D_6364_-_06_2011.pdf

Designation:D636406(Reapproved 2011)Standard Test Method forDetermining Short-Term Compression Behavior ofGeosynthetics1This standard is issued under the fixed designation D6364;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the procedures for evaluation ofthe deformations of a geosynthetic or combination of geosyn-thetics(thatis,geocomposite(excludinggeotextiles,geomembranes,and geosynthetic clay liners)under short-termcompressive loading.This test method is strictly an index testmethod to be used to verify the compressive strength consis-tency of a given manufactured geosynthetic(s).Results fromthis test method should not be considered as an indication ofactual or long-term performance of the geosynthetic(s)in fieldapplications.1.2 Since these geosynthetics may experience muti-directional compressive loadings in the field,this test methodwill not show actual field performance and should not be usedfor this specific objective.The evaluator of the results shouldalso recognize that the determination of the short-term singleplane compressive behavior of geosynthetics does not reflectthe installed performance of synthetic drainage systems and,therefore,should not be used as the only method of productspecification or performance with respect to synthetic drainagesystems.1.3 This standard does not purport to address all the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate health andsafety practices and to determine the applicability of regula-tory limitations prior to use.1.4 The values in SI units are to be regarded as the standard.Values in inch-pound units are provided in parentheses forinformation.2.Referenced Documents2.1 ASTM Standards:2D4354 Practice for Sampling of Geosynthetics and RolledErosion Control Products(RECPs)for TestingD4439 Terminology for GeosyntheticsD5199 Test Method for Measuring the Nominal Thicknessof GeosyntheticsD7001 Specification for Geocomposites for Pavement EdgeDrains and Other High-Flow Applications3.Terminology3.1 Definitions:3.1.1 compressive deformation,L,nthe decrease in gagelength produced in the test specimen by a compressive load.3.1.2 compressive strain,nd,nthe ratio of compressivedeformation to the gage length of the test specimen.3.1.3 gage length,L,nin compression testing,the mea-sured thickness of the test specimen under specified compres-sional force,expressed in units of length prior to compressiveloading.(D5199)3.1.4 geocomposite,na product fabricated from any com-bination of geosynthetics with geotechnical materials or othersynthetics that is used in a geotechnical application.3.1.5 geosynthetic,na planar product manufactured frompolymeric material used with foundation,soil,rock,earth,orany other geotechnical engineering-related material as anintegral part of a man-made project,structure,or system.(D4439)3.1.6 index test,na test procedure that may contain aknown bias but that may be used to establish an order for a setof specimens with respect to the property of interest.(D4439)3.1.7 yield point,nthe first point on the load-deformationcurve at which an increase in deformation occurs without acorresponding increase in load.3.1.7.1 DiscussionSome geosynthetics do not exhibit anexact yield point.The tested geosynthetic may exhibit a lesssteep slope at yield.In addition,it should be stated that theyield point may also be the ultimate strength of the geosyn-thetic.3.1.8 For definitions of terms relating to geotextiles,refer toTerminology D44391This 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 Oct.1,2011.Published October 2011.Originallyapproved in 1999.Last previous edition approved in 2006 as D6364-06.DOI:10.1520/D6364-06R11.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.Summary of Test Method4.1 Specimens are mounted between parallel plates in a loadframe.Compressive loads are applied at a constant rate ofcrosshead movement.The deformations are recorded as afunction of load.The compressive stress and strain are evalu-ated and plotted.The compressive yield point is evaluated fromthe stress/strain relationship for those materials that exhibit adetectable compressive yield point.5.Significance and Use5.1 The compression behavior test for geosynthetics isintended to be an index test.It is ant