Designation:E1778−98a(Reapproved2015)StandardTerminologyRelatingtoPavementDistress1ThisstandardisissuedunderthefixeddesignationE1778;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisterminologyprovidesdefinitionsforpavementdistressforairfields,highways,roads,streets,andparkinglotsofallfunctionalclassifications.1.2Thisterminologycoverssurfacespavedwitheitherbituminousorportlandcementconcrete.Itdoesnotincludeotherpavedorunpavedsurfaces.1.3Thisterminologyincludesmostofthesignificanttypesofpavementsurfacedistresses,butitisnotallinclusive.1.4Notalldistressesnotedareapplicabletoallpavementcategorieslistedin1.1.1.5SeveritylevelsarenotaddressedinthisterminologybutareaddressedinotherASTMtestmethodsandpractices(forexample,TestMethodD5340).However,aknowledgeofseveritylevelsisrequiredforevaluatingmanyofthedistressesdefinedinthisterminology.2.ReferencedDocuments2.1ASTMStandards:2D5340TestMethodforAirportPavementConditionIndexSurveys3.TerminologyGENERALbituminouspavement,n—apavementcomprisinganupperlayerorlayersofaggregatemixedwithabituminousbinder,suchasasphalt,coaltars,andnaturaltarsforpurposesofthisterminology;surfacetreatmentssuchaschipseals,slurryseals,sandseals,andcapesealsarealsoincluded.continuouslyreinforcedconcretepavement(CRCP),n—Portlandcementconcretepavementwithsufficientlon-gitudinalsteelreinforcementtocontroltransversecrackspacingsandopeningsinlieuoftransversecontractionjointsforaccommodatingconcretevolumechangesandloadtransfer.crack,n—fissureordiscontinuityofthepavementsurfacenotnecessarilyextendingthroughtheentirethicknessofthepavement.depression,n—localizedpavementsurfaceareasatalowerelevationthantheadjacentpavedareas.freeedge,n—anunrestrainedpavementboundary.joint,n—adiscontinuitymadenecessarybydesignorbyinterruptionofapavingoperatio...
