1、Designation:D656618Standard Test Method forMeasuring Mass Per Unit Area of Turf Reinforcement Mats1This standard is issued under the fixed designation D6566;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A
2、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 an index to the determination ofmass per unit area of all turf reinforcement mats.1.2 The values stated in SI units
3、 are to be regarded asstandard.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,health,and environmental
4、 practices and deter-mine the applicability of regulatory limitations prior to use.1.4 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,Guide
5、s and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD1776 Practice for Conditioning and Testing TextilesD4354 Practice for Sampling of Geosynthetics and RolledErosion Con
6、trol Products(RECPs)for TestingD4439 Terminology for GeosyntheticsE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 ISO/DIS Document:39864-1990 Mass Per Unit Area of Geotextiles
7、3.Terminology3.1 For definitions of textile terms used in this test method,refer to Terminology D123.3.2 For definitions of terms relating to geotextiles used inthis test method,refer to Terminology D4439.4.Summary of Test Method4.1 The mass per unit area of a turf reinforcement mat isdetermined by
8、weighing test specimens of known dimensions,cut from equally spaced distances over the full width of thelaboratory sample.The calculated values are then averaged toobtain the mean mass per unit area of the laboratory sample.5.Significance and Use5.1 This test method is used to determine if the turfr
9、einforcement mat meets specifications for mass per unit area.This test method can be used for quality control to determinespecimen conformance.This measurement allows for a simplecontrol of the delivered material by a comparison of the massper unit area of the delivered material and the specified ma
10、ssper unit area.5.2 The procedure in this test method may be used foracceptance testing of commercial shipments,but caution isadvised since information about between-laboratory precisionis incomplete.Comparative tests in accordance with 5.2.1 areadvisable.5.2.1 In case of a dispute arising from diff
11、erences inreported test results when using the procedures in this testmethod for acceptance testing of commercial shipments,thepurchaser and the manufacturer should conduct comparativetests to determine if there is a statistical bias between theirlaboratories.Competent statistical assistance is reco
12、mmendedfor the investigation of bias.At a minimum,the two partiesshould take a group of test specimens that are as homogeneousas possible and which are from a lot of material of the type inquestion.The test specimen should then be randomly assignedin equal numbers to each laboratory for testing.The
13、averageresults from the two laboratories should be compared using theappropriate Students t-test and an acceptable probability levelchosen by the two parties before testing is begun.If a bias isfound,either its cause must be found and corrected or thepurchaser and the manufacturer must agree to inte
14、rpret futuretest results in light of the known bias.1This test method is under the jurisdiction of ASTM Committee D35 onGeosynthetics and is the direct responsibility of Subcommittee D35.05 on Geosyn-thetic Erosion Control.Current edition approved Feb.1,2018.Published February 2018.Originallyapprove
15、d in 2000.Last previous edition approved in 2017 as D6566 17.DOI:10.1520/D6566-18.2For 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 ont
16、he ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.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 Tr
