Designation:C823/C823M−12StandardPracticeforExaminationandSamplingofHardenedConcreteinConstructions1ThisstandardisissuedunderthefixeddesignationC823/C823M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticeoutlinesproceduresforvisualexaminationandsamplingofhardenedconcreteinconstructions.Referenceismadetotheexaminationandsamplingofconcreteinprefabricatedbuildingunits,precastproducts,andlaboratoryspecimens.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C42/C42MTestMethodforObtainingandTestingDrilledCoresandSawedBeamsofConcreteC125TerminologyRelatingtoConcreteandConcreteAg-gregatesC215TestMethodforFundamentalTransverse,Longitudinal,andTorsionalResonantFrequenciesofConcreteSpecimensC295GuideforPetrographicExaminationofAggregatesforConcreteC457TestMethodforMicroscopicalDeterminationofPa-rametersoftheAir-VoidSysteminHardenedConcreteC597TestMethodforPulseVelocityThroughConcreteC670PracticeforPreparingPrecisionandBiasStatementsforTestMethodsforConstructionMaterialsC856PracticeforPetrographicExaminationofHardenedConcreteE105PracticeforProbabilitySamplingofMaterialsE122PracticeforCalculatingSampleSizetoEstimate,WithSpecifiedPrecision,theAverageforaCharacteristicofaLotorProcessE141PracticeforAcceptanceofEvidenceBasedontheResultsofProbabilitySampling3.Termin...
