1、Designation:D435412(Reapproved 2020)Standard Practice forSampling of Geosynthetics and Rolled Erosion ControlProducts(RECPs)for Testing1This standard is issued under the fixed designation D4354;the number immediately following the designation indicates the year oforiginal adoption or,in the case of
2、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 practice covers three procedures for the samplingof geosynthetics and rolled erosion control prod
3、ucts(RECPs)for testing.This practice requires that instructions on takinglaboratory samples and test specimens be part of every testmethod for geosynthetics.1.1.1 The first procedure describes the sampling of produc-tion units for the purpose of manufacturers quality control(MQC)(Table 1).1.1.2 The
4、second procedure describes the sampling ofproduction units for the purpose of manufacturers qualityassurance(MQA)testing during the manufacturing process.This requires that backup statistical process control records bemaintained during the manufacturing process(Table 2).1.1.3 The third procedure des
5、cribes the division of ship-ments of geosynthetics and rolled erosion control products intolots and the determination of lot sample size for purchasersspecification conformance testing(Table 3).1.2 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It
6、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.1.3 This international standard was developed in accor-dance with internationally recognized principles on sta
7、ndard-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 Relating to TextilesD4271 Pract
8、ice for Writing Statements on Sampling in TestMethods for Textiles(Withdrawn 2009)3D4439 Terminology for Geosynthetics3.Terminology3.1 Definitions:3.1.1 geosynthetic,na planar product manufactured frompolymeric material used with soil,rock,earth,or other geo-technical engineering related material as
9、 an integral part of aman-made project,structure,or system.3.1.2 lot,na unit of production,or a group of other unitsor packages,taken for sampling or statistical examination,having one or more common properties and being readilyseparable from other similar units.3.1.3 quality assurance,nall those pl
10、anned or systematicactions necessary to provide adequate confidence that amaterial,product,system,or service will satisfy given needs.3.1.4 quality control,nthe operational techniques and theactivities which sustain a quality of material,product,system,or service that will satisfy given needs;also t
11、he use of suchtechniques and activities.3.1.5 sample,n(1)a portion of material which is taken fortesting or for record purposes.(See also sample,lot;sample,laboratory;and specimen.)(2)a group of specimens used,or ofobservations made,which provide information that can be usedfor making statistical in
12、ferences about the population(s)fromwhich the specimens are drawn.3.1.6 sample,laboratory,na portion of material taken torepresent the lot sample,or the original material,and used inthe laboratory as a source of test specimens.3.1.7 sample,lot,none or more shipping units taken atrandom to represent
13、an acceptance sampling lot and used as asource of laboratory samples.3.1.8 sampling unit,nan identifiable,discrete unit orsubunit of material that could be taken as part of a sample.3.1.8.1 DiscussionFig.1 is included to show the differ-ence between lot sample,laboratory sample,and test speci-men.1T
14、his practice is under the jurisdiction of ASTM Committee D35 on Geosyn-thetics and is the direct responsibility of Subcommittee D35.01 on MechanicalProperties.Current edition approved May 1,2020.Published May 2020.Originallyapproved in 1984.Last previous edition approved in 2012 as D4354 12.DOI:10.1
15、520/D4354-12R20.2For 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.3The last approved version of this historical stan
16、dard is referenced onwww.astm.org.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.3.1.9 sampling unit,primary,nthe sampling un
