ASTM A821/A821M-2010 预应力混凝土容器用经回火的冷拉钢丝的标准规格

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【英文标准名称】:StandardSpecificationforSteelWire,Hard-DrawnforPrestressedConcreteTanks
【原文标准名称】:预应力混凝土容器用经回火的冷拉钢丝的标准规格
【标准号】:ASTMA821/A821M-2010
【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】:A01.05
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:预应力钢筋混凝土;钢丝;混凝土罐;预应力混凝土;重拉伸
【英文主题词】:prestressedconcretetanks;steelwire;Concretetanks;Prestressedconcrete;Redrawing
【摘要】:1.1Thisspecificationcoversuncoated,high-strength,hard-drawnsteelwireforuseintheconstructionofprestressedconcretetanksandsimilarstructures.Inapplication,thewireiscontinuouslywrappedonthestructuremaintainingtensionbyadeviceusingawiredrawingdie,ormechanicaltensioningsystemwithoutre-drawing.1.2Thisspecificationisapplicableonlytotheconditionofthewireasdeliveredtothepurchaser.Itisnotapplicabletothepropertiesorconditionofthewireafterapplication.1.2.1TypeAwireistobetensionedbydrawingthroughawiredrawingdieorbyamechanicalsystemwithoutre-drawing.1.2.2TypeBwireisdrawntofinishedsizebythemanufacturerfortensioningbyamechanicalsystemwithoutre-drawing.Note18212;TypeAwire,whentensionedbydrawingthroughadie,maynotfunctionproperlyifthepurchaserdoesnotensurethatduringapplicationthesurfaceofthewireisfreeofrustandforeignmaterialsthatcanbedetrimentaltogoodwiredrawingpractice.Further,thepurchasershouldensurethatproperwiredrawingtechniquesarefollowed,includingadequatelubrication,cooling,andproperdiemechanics.1.3Thisspecificationisapplicableforordersineitherinch-poundsunits(asSpecificationA821)orinSIunits(asSpecificationA821M).1.4Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.
【中国标准分类号】:H49
【国际标准分类号】:
【页数】:3P.;A4
【正文语种】: