1、Designation:D656714Standard Test Method forMeasuring the Light Penetration of a Turf ReinforcementMat(TRM)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 rev
2、ision.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 of lightthat penetrates through a Turf Reinforcement Mat.1.2 This test method does not
3、 provide light penetrationvalues for TRM under variable normal sun and soil conditions.This test method determines nominal light penetration.1.3 The values stated as a percentage are to be regarded asthe standard.The values provided in foot-candles are forinformation only.1.4 This standard does not
4、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:2D12
5、3 Terminology Relating to TextilesD1776 Practice for Conditioning and Testing 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 Prac
6、tice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Terminology3.1 Definitions:3.1.1 light penetration,nthe percentage of incandescentlight that is measurable through a geosynthetic material from astatic light source.3.1.2 turf reinforcement mat(TRM),na long term
7、 non-degradable rolled erosion control product composed of a UVstabilized,non-degradable,synthetic fibers,nettings orfilaments,or all of these,processed into three dimensionalreinforcement matrices.3.2 For definitions of other textile terms used in this testmethod,refer to Terminology D123.3.3 For d
8、efinitions 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 TRMs is determined byobserving the foot-candles on the light meter through adetermined open area versus the amount of foot
9、-candles on thelight meter once the TRM is placed over the determined openarea.5.Significance and Use5.1 Light penetration may be used to control the quality ofmany TRMs.Light penetration is not indicative of fieldperformance and therefore is not recommended for specifica-tions.5.2 The light penetra
10、tion of TRMs may vary considerablydepending 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
11、to determine the effect ofdifferent composite materials and make-up of TRMs.5.4 This test method may be used for acceptance testing ofcommercial shipments of TRMs,but caution is advised sinceinformation on between laboratory precision is incomplete.Comparative tests as directed in 5.4.1 may be advis
12、able.5.4.1 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 to determine if there isa statistical bias between their laboratories.Competent
13、statis-tical assistance is recommended for the investigation of bias.As a minimum,the two parties should take a group of test1This 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.Curr
14、ent edition approved May 1,2014.Published June 2014.Originallyapproved in 2000.Last previous edition approved in 2014 as D6567 00(2014).DOI:10.1520/D6567-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMSt
15、andards 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 specimens that are as homogeneous as possible and that areformed from a lot of material of the type
16、 in question.The testspecimens should be randomly assigned in equal numbers toeach laboratory for testing.The average results from the twolaboratories should be compared using Students t-test forunpaired date and an acceptable probability level chosen by thetwo begun.If bias is found,either its cause must be corrected,or the purchaser and supplier must agree to the light of theknown bias.NOTE1The user should be aware that the makeup and possiblemovement of the composite materials,and the like,ma
