Designation:D6225/D6225M−98(Reapproved2012)´1StandardTestMethodforGranuleCoverofMineralSurfacedRoofing1ThisstandardisissuedunderthefixeddesignationD6225/D6225M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—UnitsinformationwaseditoriallycorrectedinJune2012.1.Scope1.1Thistestmethodcoversthedeterminationofthehidingpowerofgranulesonamineralsurfacedroofingsheet.Thetestisusedprimarilyafteranabrasiontesthasbeenconducted,todeterminetheportionofasphalticcompoundthathasbeenexposedasaresultoftheabrasiontest.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D4977TestMethodforGranuleAdhesiontoMineralSur-facedRoofingbyAbrasion3.SummaryofTestMethod3.1Asampleofmineralsurfacedroofingmaterialisexam-inedunderamagnifyinglensandthearealeftunprotectedbygranulecoverisdeterminedusingatransparencyoverlaywithgridlines.4.SignificanceandUse4.1Thistestmethodisusedtodeterminetheextentofcoverageofthegranularsurfacingovertheasphalticcoatinginasampleofmineralsurfacedroofing.Theresultsdeterminecompliancewiththeapplicablespecificationrequirementsormaybeusedforcomparativeanalysis.Thistestmethodappliestoboth“asmanufactured”materialandmaterialthathasweatheredorundergoneothertypesofexposure.5.Apparatus5.1Magnifier—Anopticalmagnifierwithafixedpowerofmagnificationof8×andaworkingfieldofatleast8...
