Designation:D4695−03(Reapproved2015)StandardGuideforGeneralPavementDeflectionMeasurements1ThisstandardisissuedunderthefixeddesignationD4695;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguideprovidesproceduralinformationformeasur-ingpavementsurfacedeflections,directlyunder,oratlocationsradiallyoutward(offset)fromaknownstatic,steady-state,orimpulseload.Deflectionsaremeasuredwithsensorsthatmonitortheverticalmovementofapavementsurfaceduetotheload.Thisguidedescribesproceduresforthedeflectionmeasurementusingvariousdeflectiontestingdevicesandprovidesthegeneralinformationthatshouldbeobtainedregardlessofthetypeoftestingdeviceused.1.2Thisguideisapplicablefordeflectionmeasurementsperformedonflexibleasphaltconcrete(AC),rigidportlandcementconcrete(PCC),orcomposite(AC/PCC)pavements.Rigidpavementsmaybeplain,jointed,jointedreinforced,orcontinuouslyreinforcedconcrete.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Inch-poundunitsgiveninparenthesesareforinfor-mationpurposesonly.1.4Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D4602GuideforNondestructiveTestingofPavementsUs-ingCyclic-LoadingDynamicDeflectionEquipmentD4694TestMethodforDeflectionswithaFalling-Weight-TypeImpulseLoadDeviceD5858GuideforCalculatingInSituEquivalentElasticModuliofPavementMaterialsUsingLayeredElasticTheory2.2AASHTOStandard:3T256—StandardMethodofTestforPavementDeflectionMeasurementsPDDX—PavementDeflectionDataExchange—TechnicalDataGuide,Version1.0,April19983.Terminology3.1DefinitionsofTer...
