Designation:D5821−13StandardTestMethodforDeterminingthePercentageofFracturedParticlesinCoarseAggregate1ThisstandardisissuedunderthefixeddesignationD5821;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthepercentage,bymassorbycount,ofacoarseaggregatesamplethatconsistsoffracturedparticlesmeetingspecifiedrequire-ments.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareprovidedforinforma-tiononly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C136TestMethodforSieveAnalysisofFineandCoarseAggregatesC702PracticeforReducingSamplesofAggregatetoTestingSizeD8TerminologyRelatingtoMaterialsforRoadsandPave-mentsD75PracticeforSamplingAggregatesE11SpecificationforWovenWireTestSieveClothandTestSieves3.Terminology3.1Definitions:3.1.1fracturedface,n—anangular,rough,orbrokensur-faceofanaggregateparticlecreatedbycrushing,byotherartificialmeans,orbynature(seeTerminologyD8).3.1.1.1Discussion—forthisstandard,afacewillbeconsid-ereda“fracturedface”onlyifithasaprojectedareaatleastaslargeasonequarterofthemaximumprojectedarea(maximumcross-sectionalarea)oftheparticle(thisexcludessmallnicks,seeFig.1)andthefacehassharporslightlybluntedges.3.1.2fracturedparticle,n—aparticleofaggregatehavingatleasttheminimumnumberoffracturedfacesspecified(usuallyoneortwo).4.SignificanceandUse4.1Somespecificationscontainrequirementsrelatingtopercentageoffracturedparticlesincoarseaggregates.Onepurposeofsuchrequirementsistomaximizeshearstrengthbyincreasinginter-particlefrictionineitherboundorunbound...
