ASTM_D_6567_-_18.pdf

Designation:D656718Standard Test Method forMeasuring the Light Penetration of a Rolled Erosion ControlProduct(RECP)1This standard is issued under the fixed designation D6567;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 measuring the amount ofincandescent light that penetrates through a rolled erosioncontrol product.1.2 This test method does not provide light penetrationvalues for RECPs under variable normal sun and soil condi-tions.This test method determines nominal light penetration.1.3 This test method is not to be used to determine a percentground cover value for RECPs,as the amount of lightpenetration may include light passing through translucentmaterial or reflecting off surfaces.1.4 The values stated as a percentage are to be regarded asthe standard.The values provided in footcandles are forinformation only.1.5 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.1.6 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:2D123 Terminology Relating to TextilesD4354 Practice for Sampling of Geosynthetics and RolledErosion Control 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 Method3.Terminology3.1 Definitions:3.1.1 light penetration,nthe percent of light incident onthe front surface of a material that is emitted from the backsurface of the material.3.2 For definitions of other textile terms used in this testmethod,refer to Terminology D123.3.3 For definitions of other terms relating to geotextiles andgeomembranes used in this test method,refer to TerminologyD4439.4.Summary of Test Method4.1 The nominal light penetration of RECPs is determinedby the meter reading in footcandles with and without place-ment of the specimen in a determined location between thelight source and the meter.5.Significance and Use5.1 Light penetration may be used to control the quality ofmany RECPs.Light penetration has not been proven to relateto field performance for all materials.5.2 The light penetration of RECPs may vary considerably,depending on the composite materials used in the matrix of themat or due to inconsistency within a given mat.To minimizevariation,specific sample size and procedures are indicated inthis test method to help ensure comparable results.5.3 This test method may be used to determine the effect ofdifferent composite materials and makeup of RECPs on thepenetration of light.5.4 This test method may be used for acceptance testing ofcommercial shipments of RECPs.Comparative tests as di-rected in 5.4.1 may be advisable.5.4.1 In case of a dispute arising from differences inreported test results when using this test method for acceptance1This 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 June 1,2018.Published June 2018.Originallyapproved in 2000.Last previous edition approved in 2017 as D6567 17.DOI:10.1520/D6567-18.2For 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 testing of commercial shipments,the purchaser and the sup-plier should conduct comparative tests to determine if there isa statistical bias between their laboratories.Competent statis-tical assistance is recommended for the investigation of bias.At a minimum,the two parties should take a group of testspecimens that are as homogeneous as possible and that areformed from a lot of material of the type in question.The testspecimen