Designation:D4223/D4223M−20StandardPracticesforPreparationofTestSpecimensofAsphalt-StabilizedSoils1ThisstandardisissuedunderthefixeddesignationD4223/D4223M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisstandardcoverstheselectionandproportioningofsoilsandemulsifiedorcutbackasphaltsandthefabricationof100-mm[4-in.]diameterby65-mm[2.5-in.]hightestspeci-mens.1.2AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.2.1Theproceduresusedtospecifyhowdataarecollected/recordedorcalculatedinthestandardareregardedasindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatgenerallyshouldberetained.Theproceduresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsiderationsfortheusersobjectives;anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatobecommensuratewiththeseconsiderations.Itisbeyondthescopeofthisstandardtoconsidersignificantdigitsusedinanalysismethodsforengineeringdesign.1.3Units—ThevaluesstatedineitherSIunitsorinch-poundunits[presentedinbrackets]aretoberegardedsepa-ratelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedinde-pendentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3.1Thegravitationalsystemofinch-poundunitsisusedwhendealingwithinch-poundunits.Inthissystem,thepound(lbf)representsaunitofforce(weight)whiletheunitformassisslugs.Therationalizedslugunitisnotgiven,unlessdynamic(F=ma)calculationsareinvolved.1.3.2Itiscommonpracticeintheengineering/constructionprofessiontoconcurrentlyusepoundstorepresentbothaunitofmass(lbm)andofforce(lbf).Thisimplicitlycombinestwoseparatesystemsofunits;thatis,theabsolutesystemandtheg...
