Designation:D6916−06c(Reapproved2011)StandardTestMethodforDeterminingtheShearStrengthBetweenSegmentalConcreteUnits(ModularConcreteBlocks)1ThisstandardisissuedunderthefixeddesignationD6916;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodisusedtodeterminetheshearstrengthbetweentwolayersofsegmentalconcreteblockunitsusedinconstructionofreinforcedsoilretainingwalls.Thetestiscarriedoutunderconditionsdeterminedbytheuserthatreproducethefacingsystematfull-scale.Theresultsofaseriesoftestsareusedtodefinearelationshipbetweenshearstrengthdevelopedbetweensegmentalconcreteunitsandnormalload.1.2Thisisaperformancetestusedtodeterminepropertiesfordesignofretainingwallsystemsutilizingsegmentalcon-creteunitsandsoilreinforcinggeosynthetics,eithergeotextilesorgeogrids.Thetestisperformedonafull-scaleconstructionofthefacingsystemandmayberuninalaboratoryorthefield.1.3ThevaluesstatedinSIunitsareregardedasthestandard.Thevaluesstatedininch-poundunitsareprovidedforinformationonly.1.4Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D448ClassificationforSizesofAggregateforRoadandBridgeConstructionD4354PracticeforSamplingofGeosyntheticsandRolledErosionControlProducts(RECPs)forTestingD4439TerminologyforGeosyntheticsD4595TestMethodforTensilePropertiesofGeotextilesbytheWide-WidthStripMethodD6637TestMethodforDeterminingTensilePropertiesofGeogridsbytheSingleorMulti-RibTensileMethod3.Terminology3.1Definitions:3.1.1displacementcriteria,n—auserprescribedmaximummovement,mm(in.),ofthetop...
