Designation:C1756−14StandardGuideforComparingSealantBehaviortoReferencePhotographs1ThisstandardisissuedunderthefixeddesignationC1756;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThisguideprovidesphotographsthatillustratesealantbehaviortermsthathavebeendefinedbyCommitteeC24.1.2Whenavailable,photographsthatbetterillustratetheseterms,orthatillustrateadditionaltermsdefinedbyCommitteeC24,willbeincludedinfutureeditionsofthisstandard.Photographsforconsiderationmaybesubmittedtothecom-mitteeusingtheforminAppendixX1.1.3Thecommitteewithjurisdictionoverthisstandardisnotawareofanycomparablestandardspublishedbyotherorga-nizations.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C717TerminologyofBuildingSealsandSealants3.Terminology3.1ThetermsusedinthisguidearedefinedinTerminologyC717.4.SignificanceandUse4.1Thisguideisintendedtobeusedinevaluatingsealantconditionsthatoccurinservice,alongwithotherdiagnostictechniquesinfailureanalysis.Thesestandardreferencephoto-graphshavebeenselectedandapprovedthroughASTM’sconsensusballotingprocesstoillustratetermsdefinedbyCommitteeC24.4.2Notallofthetermsillustratedherearefailures,andthereareotherfailuremechanismsthataffectsealantsthatarenotdiscussedinthisguide.Thisguideisintendedtobeoneofanumberofsourcesofinformationusedintheevaluationofsealantbehavior.5.ReferencePhotographs5.1Figs.1-9presentastandardreferencephotographforeachofthetermsdefinedinTerminologyC717,reprintedwiththeirdefinitions.6.Keywords6.1adhesionfailure;chalking;cohesionfailure;crazed;dirtpick-up;elastomericjointsealant;fluidmigratio...
