【英文标准名称】:StandardTestMethodforPassingAbilityofSelf-ConsolidatingConcretebyJ-Ring
【原文标准名称】:使用J-Ring法测定自密实混凝土的通过性的标准试验方法
【标准号】:ASTMC1621/C1621M-2009b
【标准状态】:现行
【国别】:
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:C09.47
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:halo;j-ring;j-ringflow;passingabilityself-consolidatingconcrete;slumpflow;spread;Concrete;J-ring;Self-consolidatingconcrete
【摘要】:Thistestmethodprovidesaproceduretodeterminethepassingabilityofself-consolidatingconcrete.Thistestmethodisapplicableforlaboratoryuseincomparingthepassingabilityofdifferentconcretemixtures.Itisalsoapplicableinthefieldasaqualitycontroltest.ThedifferencebetweentheslumpflowandJ-Ringflowisanindicationofthepassingabilityoftheconcrete.Adifferencelessthan25mm[1in.]indicatesgoodpassingabilityandadifferencegreaterthan50mm[2in.]indicatespoorpassingability.TheorientationofthemoldfortheJ-RingtestandfortheslumpflowtestwithouttheJ-Ringshallbethesame.Thistestmethodislimitedtoself-consolidatingconcretewithnominalmaximumsizeofaggregateofupto25mm[1in.].1.1Thistestmethodcoversdeterminationofthepassingabilityofself-consolidatingconcretebyusingtheJ-Ringincombinationwithamold.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thetextofthisstandardreferencesnotesandfootnotesthatprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.(Warningx2014;Freshhydrauliccementitiousmixturesarecausticandmaycausechemicalburnstoskinandtissueuponprolongedexposure.)
【中国标准分类号】:
【国际标准分类号】:91_100_30
【页数】:5P.;A4
【正文语种】: