ASTM_D_6525_-_D_6525M_-_18.pdf

Designation:D6525/D6525M18Standard Test Method forMeasuring Nominal Thickness of Rolled Erosion ControlProducts1This standard is issued under the fixed designation D6525/D6525M;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 measurement of the nominalthickness of rolled erosion control products.1.2 This test method does not provide thickness values forrolled erosion control products under variable compressivestresses.This test method determines nominal thickness,notnecessarily minimum thickness.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.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:2D4354 Practice for Sampling of Geosynthetics and RolledErosion Control Products(RECPs)for TestingE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 Definitions:3.1.1 pressure,nthe force or load per unit area.3.1.2 thickness(1)the distance between one planar surfaceand its opposite parallel and planar surface;(2)in rollederosion control products,the distance between the upper andlower surfaces of the material,measured under a specifiedpressure and time.4.Summary of Test Method4.1 The nominal thickness of rolled erosion control productsis determined by observing the perpendicular distance that amovable plane is displaced from a parallel surface by the rollederosion control product while under a specified pressure of0.2 kPa 0.029 psi for 5 s.5.Significance and Use5.1 Thickness is one of the basic physical properties used tocontrol the quality of rolled erosion control products.Thick-ness values may aid in the calculation of other rolled erosioncontrol product parameters.Thickness,however,is not gener-ally an indication of field performance and generally should notbe used in specifications.This test method is developed to aidmanufacturers,designers,and end users in comparing thethickness of rolled erosion control products through the use ofan accepted ASTM standard.5.2 The thickness of rolled erosion control products mayvary considerably depending on the pressure applied to thespecimen during measurement.Where observed changes occur,thickness decreases when applied pressure is increased.Tominimize variation,specific sample size and applied pressureare indicated in this test method to ensure all results arecomparable.5.3 This test method may be used for acceptance testing ofcommercial shipments of rolled erosion control products,butcaution is advised since information on between-laboratoryprecision is incomplete.Comparative tests in accordance with5.3.1 may be advised.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.Originallyapproved in 2000.Last previous edition approved in 2017 as D6525/D6525M 17.DOI:10.1520/D6525_D6525M-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 onthe ASTM website.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.1 5.3.1 In case of a dispute arising from differences inreported test results when using this test method for acceptancetesting of commercial shipments,the purchaser and the sup-plier should conduct comparative tests t