Designation:C121/C121M−15StandardTestMethodforWaterAbsorptionofSlate1ThisstandardisissuedunderthefixeddesignationC121/C121M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONItisoftendesirabletogainsomeideaoftheporosityofamaterialinquestion.Actualdeterminationsoftheporespacerequiretheuseofratherelaborateandrefinedequipmentaswellasconsiderableprecisionincarryingoutthetests.Forcomparativepurposestheabsorptiontestaffordsasimpleandsufficientlyaccuratemeansofobtainingthedesiredinformation.Asappliedtoslatethistestrequiressomewhatmorecareandprecisionthanmanyothermaterialsbecauseofitsdensenatureand,consequently,thesmallquantitiestobedealtwith.Furthermore,thecleavageofslate—thatpropertywhichpermitsittobesplitintothinsheetsofuniformthickness—mustbetakenintoconsiderationwhenthistestismade.Onthisaccountmisleadingresultsareoftenobtainedoncubicalspecimensduetoaccidentalcleavagecracksinthespecimens.Theshapesofspecimensandlargernumberofspecimensrecommendedinthefollowingprocedureareintendedtoeliminatetoalargeextenttheinconsistentresultswhichmaybeobtainedonthismaterial.1.Scope1.1Thistestmethodcoversthedeterminationofthewaterabsorptionofslate.1.2Units—ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoconsultandestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C119TerminologyRelatingtoDimensionStoneC1799GuidetoDimensionStoneTestSpecim...
