ASTM C789M-1998 涵洞、雨水管和污水管用预制钢筋混凝土箱形部件(米制)
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来源:标准资料网
【英文标准名称】:StandardSpecificationforPrecastReinforcedConcreteBoxSectionsforCulverts,StormDrains,andSewers[Metric]
【原文标准名称】:涵洞、雨水管和污水管用预制钢筋混凝土箱形部件(米制)
【标准号】:ASTMC789M-1998
【标准状态】:作废
【国别】:
【发布日期】:1998
【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】:C13.07
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:下水道;建筑;施工材料;米制的;涵洞;混凝土;预制混凝土
【英文主题词】:Culvertpipe-concrete;Sewerpipe(concrete);Stormsewer/drainagepipe-concrete;precastreinforcedconcreteboxsectionforculverts/sewers/storm;drains,spec.,(formetricseeC789M),;OrderForm;NumberCode23.040.5
【摘要】:1.1Thisspecificationcoverssingle-cellpre-castreinforcedconcreteboxsectionsintendedtobeusedfortheconstructionofculvertsandfortheconveyanceofstormwater,industrialwastes,andsewage.1.2Thismetricspecificationisequ
【中国标准分类号】:Q14
【国际标准分类号】:23_040_50
【页数】:20P.;A4
【正文语种】:
【英文标准名称】:TitaniummaterialsforsurgicalimplantapplicationsPart3:Wroughttitanium6-aluminium2-niobium1-tantalumalloy
【原文标准名称】:外科手术植入物用钛材料.第3部分:锻制的钛6铝2铌1钽合金
【标准号】:JIST7401-3-2002
【标准状态】:现行
【国别】:日本
【发布日期】:2002-03-25
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JP-JISC)
【起草单位】:TechnicalCommitteeonMedicalEquipment
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:この規格は,外科インプラントを製造するために使用されるチタン6ーアルミニウム2ーニオブIータンタル合金展伸材(以下,Ti-6A1-2Nb-1Ta合金展伸材という。)について規定する.ただし,Ti-6M-2Nb-1Ta合金展伸材の化学成分,金属学的性質,機械的性質及び内部性状に関して規定するもので,インブラントが使用される環境に応じて安全性を十分に検討した後,臨床的に使用しなければならない。また,このTi-6A1?2Nbー1Ta合金展伸材を用いて作られた製品には,この規定を適用しない。
【中国标准分类号】:C35
【国际标准分类号】:11_040_40;77_150_50
【页数】:7P;A4
【正文语种】:日语
【英文标准名称】:StandardTestMethodforMicroscopicalDeterminationofParametersoftheAir-VoidSysteminHardenedConcrete
【原文标准名称】:硬化混凝土中空气孔隙系统参数的显微测定用标准试验方法
【标准号】:ASTMC457/C457M-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】:C09.65
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:空气含量;硬化混凝土中空气孔隙参数;要求的制备区域表面;空隙的平均弦长;空气孔隙参数的测定;产生的空隙;埋陷空隙;硬化混凝土搭叠的研磨粒;指标点;研磨;要求的截线长度;线性截线法;显微镜的;要求的点数;湿黏土-空气比;改良湿黏土-空气比;湿黏土含量;点计数法;显微镜分析的试样制备;空间系数;专用表面;孔隙率;水孔隙;空气含量-混凝土;空气孔隙;硬化水泥;显微镜检验-混凝土;改良点计算法;岩石分析;气孔结果;表面分析-混凝土
【英文主题词】:aircontent;airvoidparametersofhardenedconcrete;area-preparedsurfacerequired;averagechord-lengthofvoids;determinationofair-voidparameters;entrainedvoid;entrappedvoid;gritsforlappinghardenedconcrete;indexpoint;lapping;lengthoftraverserequired;linear-traversemethod;microscopical;numberofpointsrequired;paste-airratio;paste-airratiomodification;pastecontent;point-countmethod(modified);samplepreparationformicroscopicalanalysis;spacingfactor;specificsurface;voidfrequency;watervoid;Aircontent--concrete;Airvoids;Hardenedconcrete;Lineartraverse(Rosiwal)method;Microscopicexamination--concrete;Modifiedpoint-countmethod;Petrographicanalysis;Porestructure;Spacingfactor;Surfaceanalysis--concrete
【摘要】:Theparametersoftheair-voidsystemofhardenedconcretedeterminedbytheproceduresdescribedinthistestmethodarerelatedtothesusceptibilityofthecementpasteportionoftheconcretetodamagebyfreezingandthawing.Hence,thistestmethodcanbeusedtodevelopdatatoestimatethelikelihoodofdamageduetocyclicfreezingandthawingortoexplainwhyithasoccurred.Thetestmethodcanalsobeusedasanadjuncttothedevelopmentofproductsorproceduresintendedtoenhancetheresistanceofconcretetocyclicfreezingandthawing(1).Valuesforparametersoftheair-voidsystemcanbeobtainedbyeitheroftheproceduresdescribedinthistestmethod.Noprovisionismadefordistinguishingamongentrappedairvoids,entrainedairvoids,andwatervoids.Anysuchdistinctionisarbitrary,becausethevarioustypesofvoidsintergradeinsize,shape,andothercharacteristics.Reportsthatdomakesuchadistinctiontypicallydefineentrappedairvoidsasbeinglargerthan1mminatleastonedimensionbeingirregularinshape,orboth.Thehoney-combingthatisaconsequenceofthefailuretocompacttheconcreteproperlyisonetypeofentrappedairvoid(9,10).Watervoidsarecavitiesthatwerefilledwithwateratthetimeofsettingoftheconcrete.Theyaresignificantonlyinmixturesthatcontainedexcessivemixingwaterorinwhichpronouncedbleedingandsettlementoccurred.Theyaremostcommonbeneathhorizontalreinforcingbars,piecesofcoarseaggregateandaschannelwaysalongtheirsides.Theyoccuralsoimmediatelybelowsurfacesthatwerecompactedbyfinishingoperationsbeforethecompletionofbleeding.Applicationofthepaste-airratioprocedureisnecessarywhentheconcreteincludeslargenominalmaximumsizeaggregate,suchas50mm[2in.]ormore.Preparedsectionsofsuchconcreteshouldincludeamaximumofthemortarfraction,soastoincreasethenumberofcountsonairvoidsortraverseacrossthem.Theratioofthevolumeofaggregatetothevolumeofpasteintheoriginalmixmustbeaccuratelyknownorestimatedtopermitthecalculationoftheair-voidsystemsparametersfromthemicroscopicallydeterminedpaste-airratio.Note18212;Theair-voidcontentdeterminedinaccordancewiththistestmethodusuallyagreescloselywiththevaluedeterminedonthefreshconcreteinaccordancewithTestMethodsC138/C138M,C173/C173M,orC231(11).However,significantdifferencesmaybeobservedifthesampleoffreshconcreteisconsolidatedtoadifferentdegreethanthesamplelaterexaminedmicroscopically.Forconcretewitharelativelyhighaircontent(usuallyover7.5%),thevaluedeterminedmicroscopicallymaybehigherbyoneormorepercentagepointsthanthatdeterminedbyTestMethodC231.1.1Thistestmethoddescribesproceduresformicroscopicaldeterminationsoftheaircontentofhardenedconcreteandofthespecificsurface,voidfrequency,spacingfactor,andpaste-airratiooftheair-voidsysteminhardenedconcrete(1).Twoproceduresaredescribed:1.1.1ProcedureA,thelinear-traversemethod(2,3).1.1.2ProcedureB,t......
【中国标准分类号】:
【国际标准分类号】:
【页数】:15P.;A4
【正文语种】:
