ASTM C173/C173M-2010b 体积法测定新拌混凝土的含气量的标准试验方法

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【英文标准名称】:StandardTestMethodforAirContentofFreshlyMixedConcretebytheVolumetricMethod
【原文标准名称】:体积法测定新拌混凝土的含气量的标准试验方法
【标准号】:ASTMC173/C173M-2010b
【标准状态】:现行
【国别】:
【发布日期】:2010
【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】:C09.60
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:空气含量;校正;混凝土;校正因子;新拌混凝土;测量碗;米;体积法;体积测量
【英文主题词】:aircontent;calibration;concrete;correctionfactor;freshlymixedconcrete;measuringbowl;meter;volumetricmethod;Volumetricmeasurement
【摘要】:Thistestmethodcoversthedeterminationoftheaircontentoffreshlymixedconcrete.Itmeasurestheaircontainedinthemortarfractionoftheconcrete,butisnotaffectedbyairthatmaybepresentinsideporousaggregateparticles.Therefore,thisistheappropriatetesttodeterminetheaircontentofconcretescontaininglightweightaggregates,air-cooledslag,andhighlyporousorvesicularnaturalaggregates.Thistestmethodrequirestheadditionofsufficientisopropylalcohol,whenthemeterisinitiallybeingfilledwithwater,sothatafterthefirstorsubsequentrollingslittleornofoamcollectsintheneckofthetopsectionofthemeter.Ifmorefoamispresentthanthatequivalentto2%airabovethewaterlevel,thetestisdeclaredinvalidandmustberepeatedusingalargerquantityofalcohol.Additionofalcoholtodispelfoamanytimeaftertheinitialfillingofthemetertothezeromarkisnotpermitted.Theaircontentofhardenedconcretemaybeeitherhigherorlowerthanthatdeterminedbythistestmethod.Thisdependsuponthemethodsandamountsofconsolidationeffortappliedtotheconcretefromwhichthehardenedconcretespecimenistaken;uniformityandstabilityoftheairbubblesinthefreshandhardenedconcrete;accuracyofthemicroscopicexamination,ifused;timeofcomparison;environmentalexposure;stageinthedelivery,placementandconsolidationprocessesatwhichtheaircontentoftheunhardenedconcreteisdetermined,thatis,beforeoraftertheconcretegoesthroughapump;andotherfactors.1.1Thistestmethodcoversdeterminationoftheaircontentoffreshlymixedconcretecontaininganytypeofaggregate,whetheritbedense,cellular,orlightweight.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.TheSIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.(WarningFreshhydrauliccementitiousmixturesarecausticandmaycausechemicalburnstoskinandtissueuponprolongedexposure.)
【中国标准分类号】:Q13
【国际标准分类号】:91_100_30
【页数】:8P.;A4
【正文语种】: