Designation:C1856/C1856M−17StandardPracticeforFabricatingandTestingSpecimensofUltra-HighPerformanceConcrete1ThisstandardisissuedunderthefixeddesignationC1856/C1856M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversproceduresforfabricatingandtestingspecimensinthelaboratoryandthefieldusingarepresentativesampleofultra-highperformanceconcrete(UHPC),forthepurposeofdeterminingthepropertiesofthematerial.ThispracticeisapplicabletoUHPCwithaspecifiedcompressivestrengthofatleast120MPa(17000psi),withnominalmaximumsizeaggregateoflessthan5mm[1⁄4in.]andaflowbetween200and250mm[8and10in.]asmeasuredbythemodifiedflowtabletestdescribedinSection6.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Ifrequiredresultsobtainedfromanotherstandardarenotreportedinthesamesystemofunitsasusedbythisstandard,itispermittedtoconvertthoseresultsusingtheconversionfactorsfoundintheSIQuickReferenceGuide(1).21.4Thetextofthisstandardreferencesnotesandfootnotesthatprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.[WARNING—Freshhydrauliccementitiousmixturesarecausticandmaycausechemicalburnstoexposedskinandtissueuponprolongedexposure.3HandprotectionshouldbewornwhenhandlingUHPC.]1.6Thisinternationalstandardwasdevelopedinaccor-dancewithintern...
