【英文标准名称】:Squareholeperforatedplates;dimensions
【原文标准名称】:方孔板.尺寸
【标准号】:DIN24042-1981
【标准状态】:作废
【国别】:德国
【发布日期】:1981-10
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:筛选设备;多孔板;公差;尺寸;砝码;规范(审批)
【英文主题词】:tolerances(measurement);dimensions;weights;screeningequipment;perforatedplates;specification(approval)
【摘要】:
【中国标准分类号】:A28
【国际标准分类号】:4380
【页数】:4P;A4
【正文语种】:德语


【英文标准名称】:StandardTestMethodsforParticleSizeAnalysisofNaturalandMan-MadeRiprapMaterials
【原文标准名称】:天然和人工粗石材料粒径分析标准试验方法
【标准号】:ASTMD5519-2007
【标准状态】:现行
【国别】:
【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】:D18.17
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:过滤器;分等级;人类;质量;粒子分析;粒度;粒径分析;尺寸;板层;土壤;试验
【英文主题词】:armorstone;filterbeddingstone;filtermaterial;gradation;riprap;slab
【摘要】:Riprapiscommonlyusedtopreventerosionofunderlyingmaterialsduetotheeffectsofrainrunoff,wind,flowingwater,orwaveaction.Theparticlesizedistribution(massofparticles)isanimportantphysicalcharacteristicofriprap,asdiscussedinD6825.Thesetestmethodsprovideagradationofthematerialgraphicallyrepresentedaspercentfinerthantheparticlemass.Ifagradationcanbeestablishedoracceptedonthebasisofonlymaximumandminimumparticlesizes,thenitmaynotbenecessarytoestablishthecompletegradationinaccordancewiththesetestmethods.Thesetestmethodscanbeusedduringevaluationofapotentialsource,asameansofproductacceptance,orforassessmentofexistinginstallations.MethodDisnotrecommendedasameansofproductacceptance.Othercharacteristicsofinterest,suchasparticleshape,particleangularity,orvisuallyevidentrockdurabilitycharacteristicsmaybedeterminedduringtheperformanceofthesetestmethods.Interpretationoftestresultsmustconsidertherepresentativenessofthesample.Note28212;TheagencyperformingthesetestmethodscanbeevaluatedinaccordancewithPracticeD3740.Notwithstandingstatementsonprecisionandbiascontainedinthesetestmethods:Theprecisionofthesetestmethodsisdependentonthecompetenceofthepersonnelperformingitandthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting.UsersofthesetestmethodsarecautionedthatcompliancewithPracticeD3740doesnotinitselfensurereliabletesting.Reliabletestingdependsonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thesetestmethodscovertheparticlesizeandmassanalysisofnaturalandman-maderiprapandrelatedmaterials,includingfilterstoneorcoarsebeddingmaterials.1.2Thesetestmethodsaregenerallyintendedforriprapandrelatedmaterials.Theyareapplicableformixturesofstonesscreenedfromnaturaldeposits,blastrock,processedmaterialsfromquarriedrock,orrecycledconcrete.Theyareapplicableforsizes3in.(75mm)andabove,withtheuppersizelimitedonlybyequipmentavailableforhandlingandweighingtheindividualparticles.1.3Fouralternateproceduresareprovided.Thereisawiderangeinthelevelofeffortandtheprecisionofthetestprocedures.Itisimportantforspecifierstoindicatethetestprocedure.Testreportsshouldclearlyindicatewhichprocedurewasused.Note1Whileconductingthesetestmethods,itmaybeconvenienttocollectdataonotherattributes,suchastheamountofslabpiecesanddeleteriousmaterials.1.4AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD60261.5Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Themetricequivalentsofinch-poundunitsgiveninparenthesesmaybeapproximate.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionarystatementsaregiveninSection7.
【中国标准分类号】:D50;A42
【国际标准分类号】:19_120
【页数】:10P.;A4
【正文语种】: