Designation:D6638−18StandardTestMethodforDeterminingConnectionStrengthBetweenGeosyntheticReinforcementandSegmentalConcreteUnits(ModularConcreteBlocks)1ThisstandardisissuedunderthefixeddesignationD6638;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodisusedtodeterminetheconnectionpropertiesbetweenalayerofgeosyntheticreinforcementandsegmentalconcreteblockunitsusedinconstructionofrein-forcedsoilretainingwalls.Thetestiscarriedoutunderconditionsdeterminedbytheuserthatreproducetheconnec-tionsystematfullscale.Theresultsofaseriesoftestsareusedtodefinearelationshipbetweenconnectionstrengthforasegmentalunit-geosyntheticconnectionsystemandnormalload.1.2Thisisaperformancetestusedtodeterminepropertiesfordesignofretainingwallsystemsutilizingsegmentalcon-creteunitsandsoilreinforcinggeosynthetics,eithergeotextilesorgeogrids.Thetestisperformedonafull-scaleconstructionoftheconnectionandmayberuninalaboratoryorthefield.1.3ThevaluesstatedinSIunitsareregardedasthestandard.Thevaluesstatedininch-poundunitsareprovidedforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D448ClassificationforSizesofAggregateforRoadandBridgeConstructionD4354PracticeforSamplingofGeosyntheticsandRolledErosionControlProducts(RECPs)forTestingD443...
