Designation:D560/D560M−16StandardTestMethodsforFreezingandThawingCompactedSoil-CementMixtures1ThisstandardisissuedunderthefixeddesignationD560/D560M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1Thesetestmethodscoverproceduresfordeterminingthesoil-cementlosses,watercontentchanges,andvolumechanges(swellandshrinkage)producedbyrepeatedfreezingandthawingofhardenedsoil-cementspecimens.Thespeci-mensarecompactedinamold,beforecementhydration,tomaximumdensityatoptimumwatercontentusingthecom-pactionproceduredescribedinTestMethodsD558.1.2Twotestmethods,dependingonsoilgradation,arecoveredforpreparationofmaterialformoldingspecimensandformoldingspecimensasfollows:SectionsTestMethodA,usingsoilmaterialpassinga4.75-mm[No.4]sieve.Thismethodshallbeusedwhen100%ofthesoilsamplepassesthe4.75-mm[No.4]sieve.7TestMethodB,usingsoilmaterialpassinga[0.75-in.]19.0-mmsieve.Thismethodshallbeusedwhenpartofthesoilsampleisretainedonthe4.75-mm[No.4]sieve.Thistestmethodmaybeusedonlyonthosematerialsthathave30%orlessretainedonthe19.0mm[0.75-in.]sieve81.3AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026,unlesssupersededbythistestmethod.1.3.1Theproceduresusedtospecifyhowdataarecollected/recordedandcalculatedinthestandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatgenerallyshouldberetained.Theproce-duresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsider-ationsfortheuser’sobjectives;anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatobecommensuratewiththeseconsiderations.Itisbeyondthescopeofthesetestmethodstoconsidersignificantdigitsusedin...
