【英文标准名称】:StandardSpecificationforChemicalAdmixturesforUseinProducingFlowingConcrete
【原文标准名称】:流动混凝土生产用化学混合物的标准规范
【标准号】:ASTMC1017/C1017M-2007
【标准状态】:现行
【国别】:美国
【发布日期】:2007
【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】:C09.23
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:admixture;concrete;flowingconcrete;plasticizingadmixtures;plasticizingandretardingadmixtures;water-reducingadmixtures;water-reducingandretardingadmixtures
【摘要】:1.1Thisspecificationcoverstwotypesofchemicaladmixturestobeaddedtohydrauliccementconcretemixturesforthepurposeofproducingflowingconcrete.Thetypesareasfollows:1.1.1TypeI-Plasticizing,and1.1.2TypeII-Plasticizingandretarding.1.2Thisspecificationstipulatestestsofachemicaladmixturewithreferenceconcretingmaterialsorwithconcrete-makingmaterialsproposedforspecificwork.Unlessotherwisespecifiedbythepurchaser,thetestsshallbemadeusingreferenceconcretingmaterials.1.3Ifachemicaladmixturehasbeentestedandfoundtocomplywiththeprovisionsofthisspecificationusingreferencematerials,andisbeingconsideredforusewithothermaterialsforspecificwork,additionaltestsforsuchuseareallowedifagreeduponbetweenthepurchaserandthesupplierandareallowedtoconsistofaportionofthetestsdescribedherein.1.4Thisspecificationprovidesforthreelevelsoftesting.1.4.1Level1-Duringtheinitialapprovalstage,proofofcompliancewiththeperformancerequirementsdefinedindemonstratesthattheadmixturemeetstherequirementsofthisspecification.UniformityandequivalencetestsofthesectiononLotUniformityandEquivalenceshallbecarriedouttoprovideresultsagainstwhichlatercomparisonscanbemade.1.4.2Level2-Limitedretestingdescribedinthesectionrelatingtogeneralrequirementsmayberequestedatintervalsbythepurchaser.Proofofcompliancewiththerequirementsofdemonstratescontinuedconformityoftheadmixturewiththerequirementsofthespecification.1.4.3Level3-Foracceptanceofalotorformeasuringuniformitywithinorbetweenlots,whenspecifiedbythepurchaser,theuniformityandequivalencetestsofthesectiononLotUniformityandEquivalenceshallbeused.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesininch-poundunitsshowninparenthesesareprovidedforinformationpurposesonly.Note1-Itisrecommendedthat,wheneverpracticable,testsbemadeusingtheconcrete-makingmaterials(cement,pozzolan,slag,aggregates,air-entrainingadmixture),themixtureproportions,andthebatchingsequenceandotherphysicalconditionsproposedforthespecificwork.Thespecificeffectsproducedbychemicaladmixturesmayvarywiththepropertiesandproportionsoftheotheringredientsoftheconcrete.Note2-Temperaturehasapronouncedeffectontimeofsettingofconcrete.ThismaybeexaggeratedbytheuseofadmixtureTypesIandII.Ifconcretetemperaturestobeexpectedonaparticularjobdiffersignificantlyfromtheconditionssetforthinthisspecification,furthertestingmaybedesirable.Note3-Anunusuallyrapidlossofworkabilitywithtime,sometimestermed"slumploss",canbeexperiencedwiththeseadmixtures.Therateofslumplosswillvarywiththeparticularconcretingmaterialsandproportions,mixingequipmentandprocedures,andtemperaturesexperiencedonanyparticularjob.Atelevatedtemperatures,theslumpmayberetainedforalongerperiodifaTypeIIadmixtureisused.Note4-Admixturesthatcontainrelativelylargeamountsofchloridemayacceleratecorrosionofprestressingsteel.Compliancewiththerequirementsofthisspecificationdoesnotconstituteassuranceofacceptabilityoftheadmixtureforuseinprestressedconcrete(seeACI318).Note5-Admixturesthatcontainrelativelylargeamountsofalkali(Na2O+0.658K2O)maycontributetoreactionwithsomeaggregates.Compliancewiththerequirementsofthisspecificationdoesnotassureacceptabilitywhenusedwithalkali-reactiveaggregatesandsomecements.1.6Thetextofthisstandardreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shall......
【中国标准分类号】:Q13
【国际标准分类号】:91_100_30
【页数】:9P.;A4
【正文语种】:英语