Designation:D3665−12StandardPracticeforRandomSamplingofConstructionMaterials1ThisstandardisissuedunderthefixeddesignationD3665;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthedeterminationofrandomloca-tions(ortiming)atwhichsamplesofconstructionmaterialscanbetaken.Fortheexactphysicalproceduresforsecuringthesample,suchasadescriptionofthesamplingtool,thenumberofincrementsneededforasample,orthesizeofthesample,referenceshouldbemadetotheappropriatestandardmethod.TheselectionproceduresinSection6utilizethetableoffour-digitnumbersgiveninTable1.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C172PracticeforSamplingFreshlyMixedConcreteC183PracticeforSamplingandtheAmountofTestingofHydraulicCementD75PracticeforSamplingAggregatesD140PracticeforSamplingBituminousMaterialsD345TestMethodforSamplingandTestingCalciumChlo-rideforRoadsandStructuralApplicationsD979PracticeforSamplingBituminousPavingMixturesD5361PracticeforSamplingCompactedBituminousMix-turesforLaboratoryTestingE105PracticeforProbabilitySamplingofMaterialsE122PracticeforCalculatingSampleSizetoEstimate,WithSpecifiedPrecision,theAverageforaCharacteristicofaLotorProcessE141PracticeforAcceptanceofEvidenceBasedontheResultsofProbabilitySampling3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1representativesample,n—(1)arandomsample;or(2)anunbiasedsample.3.1.1.1randomsample,n—asampleobtainedfromalotofmaterialinsuchamannerthatallpartsofthelothaveaknownprobabilityofbeingincludedinthesample.3.1.1.1Discussion—Anexampleofrandomsampleisthecasewherespec...
