Designation:D4535−21StandardTestMethodsforMeasurementofThermalExpansionofRockUsingDilatometer1ThisstandardisissuedunderthefixeddesignationD4535;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thesetestmethodscoverthelaboratorymeasurementoftheone-dimensionallinearthermalexpansionofrocksusingadilatometer.1.2Themethodsareapplicablebetweentemperaturesof25°Cto300°C.Bothbenchtopandconfinedmeasurementtechniquesarepresented.MethodAisusedforunconfinedorbenchtopmeasurementsandMethodBisusedforconfinedconditions.Rocksofvaryingmoisturecontentcanbetested.1.3Forsatisfactoryresultsinconformancewiththesetestmethods,theprinciplesgoverningthesize,construction,anduseoftheapparatusdescribedinthesetestmethodsshallbefollowed.Iftheresultsaretobereportedashavingbeenobtainedbyeithertestmethod,thenthepertinentrequirementsprescribedbythattestmethodshallbemet.1.4Thesetestmethodsdonotestablishdetailsofconstruc-tionandprocedurestocoveralltestsituationsthatmightofferdifficultiestoapersonwithouttechnicalknowledgeconcerningthetheoryofheatflow,temperaturemeasurement,andgeneraltestingpractices.Standardizationofthesetestmethodsdoesnotreducetheneedforsuchtechnicalknowledge.1.5Units—ThevaluesstatedinSIunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesafterSIunitsareprovidedforinformationonlyandarenotconsideredstandard.ReportingoftestresultsinunitsotherthanSIshallnotberegardedasnonconformancewiththistestmethod.1.6AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.6.1Theproceduresusedtospecifyhowdataarecollected/recordedorcalculated,inthisstandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatgenerallyshouldberetained.Theproce-duresuseddonotconsidermaterialvariation,p...
