Designation:D6524−00(Reapproved2011)StandardTestMethodforMeasuringtheResiliencyofTurfReinforcementMats(TRMs)1ThisstandardisissuedunderthefixeddesignationD6524;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoverstheresiliencyorrecoveryofturfreinforcementmats(TRMs)aftertheyhavebeensubjectedtothreecyclesofloadingat689kPa(100psi)for1min/percycle.1.2ThistestmethoddoesnotprovideresiliencyvaluesforTRMsundervariablenormalcompressivestresses.Thistestmethoddeterminesnominalresiliency.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD4354PracticeforSamplingofGeosyntheticsforTestingD4439TerminologyforGeosynthetics3.Terminology3.1Definitions:3.1.1pressure,n—theforceorloadperunitarea.3.1.2thickness—(1)thedistancebetweenoneplanarsurfaceanditsoppositeparallelandplanarsurface;(2)forTRMs,thedistancebetweentheupperandlowersurfacesofthematerial,measuredunderaspecifiedpressureandtime.3.1.3turfreinforcementmat(TRM),n—along-termnonde-gradablerollederosioncontrolproductcomposedofUVstabilized,nondegradable,syntheticfibers,nettings,orfila-ments,orcombinationthereof,processedintothree-dimensionalreinforcementmatrices.3.2Fordefinitionsofothertextiletermsusedinthistestmethod,refertoTerminologyD123.3.3Fordefinitionsofothertermsrelatingtogeotextilesandgeomembranesusedinthistestmethod,refertoTerminologyD4439.4.SummaryofTestMethod4.1ThenominalresiliencyofTRMsisdeterminedbyobservingthethicknessoftheTRM...
