ASTM_D_6241_-_14.pdf

Designation:D624114Standard Test Method forStatic Puncture Strength of Geotextiles and Geotextile-Related Products Using a 50-mm Probe1This standard is issued under the fixed designation D6241;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 is an index test used to measure theforce required to puncture a geotextile and geotextile-relatedproducts.The relatively large size of the plunger provides amultidirectional force on the geotextile.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D76/D76M Specification for Tensile Testing Machines forTextilesD123 Terminology Relating to TextilesD1776 Practice for Conditioning and Testing TextilesD1883 Test Method for California Bearing Ratio(CBR)ofLaboratory-Compacted SoilsD4354 Practice for Sampling of Geosynthetics and RolledErosion Control Products(RECPs)for TestingD4439 Terminology for GeosyntheticsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodNOTE1Test Method D1883 describes a mold(CBR mold)that can beused for this test method.3.Terminology3.1 DefinitionsFor definitions of other textile terms usedin this test method,refer to Terminology D123.For definitionsof other terms relating to geosynthetics used in this testmethod,refer to Terminology D4439.3.2 Definitions of Terms Specific to This Standard:3.2.1 atmoshere for testing geotextiles,nair maintained ata relative humidity of 50 to 70%and a temperature of 21 62C(70 6 4F).3.2.2geotextile,na permeable geosynthetic composedsolely of textiles.3.2.3 puncture resistance,nthe inherent resisting mecha-nism of the test specimen to the failure by a penetrating orpuncturing object.4.Summary of Test Method4.1 A test specimen is clamped without tension betweencircular plates and secured in a tensile or compression testingmachine,or both.A force is exerted against the center of theunsupported portion of the test specimen by a steel plungerattached to the load indicator until rupture occurs.The maxi-mum force is the value of puncture strength.5.Significance and Use5.1 This test method for determining the puncture strengthof geotextiles is to be used by the industry as an index ofpuncture strength.The use of this test method is to establish anindex value by providing standard criteria and a basis foruniform reporting.5.2 This test method is considered satisfactory for accep-tance testing of commercial shipments of geotextiles.5.3 In case of a dispute arising from differences in reportedtest results when using this test method for acceptance testingof commercial shipments,the purchaser and the suppliershould conduct comparative tests to determine if there is astatistical bias between their laboratories.Competent statisticalassistance is recommended for the investigation of bias.As aminimum,the two parties should take a group of test speci-mens that are as homogeneous as possible and that are from alot of the type in question.The test specimens then should berandomly assigned in equal numbers to each laboratory fortesting.The average results from the two laboratories should becompared using Students t-test for unpaired data and anacceptable probability level chosen by the two parties before1This test method is under the jurisdiction of ASTM Committee D35 onGeosynthetics is the direct responsibility of Subcommittee D35.01 on MechanicalPropertiesCurrent edition approved July 1,2014.Published July 2014.Originally approvedin 1998.Last previous edition approved in 2009 as D6241 04(2009)1.DOI:10.1520/D6241-14.2For 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 the testing is begun.If a bias is found,either its cause must befound and corrected,or the purchaser and the supplier mustagree to interpret future test results in the light of the knownbias.5.4 This test method is not applicable to materials that aremanufactured in sizes that are too small to be placed into thetest apparatus in accordance with the procedures in this testmethod.Furthermore,it is not appropriate to separate plies ofa geosynthetic or geocomposite for use in this test method