ASTM E 2121-2003 在已有的低层住宅建筑中安装氡减缓系统的标准实施规程

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标准名称：	大白菜生产技术规程
发布部门：	河南省质量技术监督局
发布日期：	2008-11-15
实施日期：	2008-12-30
首发日期：
作废日期：
出版社：	中国标准出版社
出版日期：	2008-12-30

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【英文标准名称】:StandardTestMethodforLengthChangeofConcreteDuetoAlkali-CarbonateRockReaction
【原文标准名称】:由于碱金属碳酸盐矿石反应引起混凝土长度变化的标准试验方法
【标准号】:ASTMC1105-2008a
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:C09.26
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Alkalireactivity;Calciticdolomites;Carbonateaggregates;Cement-aggregatecombinations;Changeinlength;Coarseaggregate;Concrete--specifications;Dolomiticlimestone;Expansion--concretematerials/applications;Limematerials/applications
【摘要】:Twotypesofalkalireactivityofaggregateshavebeendescribedintheliterature:thealkali-silicareactioninvolvingcertainsiliceousrocks,minerals,andartificialglasses(1),andthealkali-carbonatereactioninvolvingdolomiteincertaincalciticdolomitesanddolomiticlimestones(2).Thistestmethodisnotrecommendedasameanstodetectcombinationssusceptibletoexpansionduetoalkali-silicareactionsinceitwasnotevaluatedforthisuseintheworkreportedbyBuck(2).Thistestmethodisnotapplicabletoaggregatesthatdonotcontainorconsistofcarbonaterock(seeDescriptiveNomenclatureC294).Thistestmethodisintendedforevaluatingthebehaviorofspecificcombinationsofconcrete-makingmaterialstobeusedinthework.However,provisionsaremadefortheuseofsubstitutematerialswhenrequired.Thistestmethodassessesthepotentialforexpansionofconcretecausedbyalkali-carbonaterockreactionfromtestsperformedunderprescribedlaboratorycuringconditionsthatwillprobablydifferfromfieldconditions.Thus,actualfieldperformancewillnotbeduplicatedduetodifferencesinwettinganddrying,temperature,otherfactors,orcombinationsofthese(seeAppendixX1).Useofthistestmethodisofparticularvaluewhensamplesofaggregatefromasourcehavebeendeterminedtocontainconstituentsthatareregardedascapableofparticipationinapotentiallydeleteriousalkali-carbonaterockreactioneitherbypetrographicexamination,GuideC295,bytherockcylindertest,TestMethodC586,byservicerecord;orbyacombinationofthese.Resultsoftestsconductedasdescribedhereinshouldformapartofthebasisforadecisionastowhetherprecautionsbetakenagainstexcessiveexpansionduetoalkali-carbonaterockreaction.Thisdecisionshouldbemadebeforeaparticularcement-aggregatecombinationisusedinconcreteconstruction(seeNote1).Note18212;Otherelementsthatmaybeincludedinthedecision-makingprocessforcategorizinganaggregateoracement-aggregatecombinationwithrespecttowhetherprecautionsareneeded,andexamplesofprecautionsthatmaybetaken,aredescribedinAppendixX1.Whilethebasicintentofthistestmethodistodevelopinformationonaparticularcement-aggregatecombination,itwillusuallybeveryusefultoconductcontroltestsinparallelusingtheaggregateofinterestwithothercementsorthecementofinterestwithotheraggregates.1.1Thistestmethodcoversthedetermination,bymeasurementoflengthchangeofconcreteprisms,thesusceptibilityofcement-aggregatecombinationstoexpansivealkali-carbonatereactioninvolvinghydroxideionsassociatedwithalkalies(sodiumandpotassium)andcertaincalciticdolomitesanddolomiticlimestones.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Nootherunitsofmeasurementareincludedinthisstandard.Whencombinedstandardsarecited,theselectionofmeasurementsystemisattheuser''sdiscretionsubjecttotherequirementsofthereferencedstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q13
【国际标准分类号】:91_100_30
【页数】:4P.;A4
【正文语种】:英语