基本信息
| 标准名称： | 普通磨料精微粉(W3.5？W0.5)粒度组成测定方法 |
| 英文名称： | Determination for grain size distribution of microgrits W3.5 to W0.5 of conventional abrasive |
| 中标分类： |
机械 >>
工艺装备 >>
磨料与磨具 |
| ICS分类： |
机械制造 >>
切削工具 >>
磨料磨具
|
| 发布部门： | 国家技术监督局 |
| 发布日期： | 1993-04-17 |
| 实施日期： | 1993-01-02 |
| 首发日期： | 1993-04-17 |
| 作废日期： | 2005-10-14 |
| 主管部门： | 中国机械工业联合会 |
| 归口单位： | 全国磨料磨具标准化技术委员会 |
| 起草单位： | 郑州磨料磨具磨削研究所 |
| 出版日期： | 1900-01-01 |
| 页数： | 平装16开， 页数：13， 字数：23千字 |
适用范围
本标准规定了普通磨料精微粉的定义、粒度组成测定装置及测定方法。仲裁时，必须按本标准规定的方法进行。本标准适用于刚玉、碳化硅、石榴石等普通磨料。
前言
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目录
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引用标准
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所属分类： 机械 工艺装备 磨料与磨具 机械制造 切削工具 磨料磨具
【英文标准名称】:StandardGuideforSelectionofTestMethodstoDetermineRateofFluidPermeationThroughGeomembranesforSpecificApplications
【原文标准名称】:透过特殊用途土工薄膜的流体渗透率测试方法选择的标准指南
【标准号】:ASTMD5886-1995(2006)
【标准状态】:现行
【国别】:
【发布日期】:1995
【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】:D35.10
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:漫延气体;水库;渗透率;处理;废弃材料;蒸气;可变形薄膜衬垫;透过土工薄膜的液体渗透率;离子传输;有机物蒸气传输;聚合物土工薄膜;水蒸气传输;浸泡;浸出;物障;导则
【英文主题词】:barriers;diffusionofgasesandvapors;flexiblemembraneliners(FMLs);gastransmission;leachate;organicvaportransmission;permeability;polymericgeomembranes;reservoirs;transportofchemicalspecies;transportofions;wastedisposal;
【摘要】:Theprincipalcharacteristicofgeomembranesistheirintrinsicallylowpermeabilitytoabroadrangeofgases,vapors,andliquids,bothassingle-componentfluidsandascomplexmixturesofmanyconstituents.Aslowpermeablematerials,geomembranesarebeingusedinawiderangeofengineeringapplicationsingeotechnical,environmental,andtransportationareasasbarrierstocontrolthemigrationofmobilefluidsandtheirconstituents.Therangeofpotentialpermeantsisbroadandtheserviceconditionscandiffergreatly.Thisguideshowsuserstestmethodsavailablefordeterminingthepermeabilityofgeomembranestovariouspermeants.Thetransmissionofvariousspeciesthroughageomembraneissubjecttomanyfactorsthatmustbeassessedinordertobeabletopredictitseffectivenessforaspecificservice.Permeabilitymeasurementsareaffectedbytestconditions,andmeasurementsmadebyonemethodcannotbetranslatedfromoneapplicationtoanother.Awidevarietyofpermeabilitytestshavebeendevisedtomeasurethepermeabilityofpolymericmaterials;however,onlyalimitednumberoftheseprocedureshavebeenappliedtogeomembranes.Testconditionsandproceduresshouldbeselectedtoreflectactualservicerequirementsascloselyaspossible.Itshouldbenotedthatfieldconditionsmaybedifficulttomodelormaintaininthelaboratory.Thismayimpactapparentperformanceofgeomembranesamples.Thisguidediscussesthemechanismofpermeationofmobilechemicalspeciesthroughgeomembranesandthepermeabilityteststhatarerelevanttovarioustypesofapplicationsandpermeatingspecies.Specifictestsforthepermeabilityofgeomembranestobothsingle-componentfluidsandmulticomponentfluidsthatcontainavarietyofpermeantsaredescribedanddiscussed.1.1Thisguidecoversselectingoneormoreappropriatetestmethodstoassessthepermeabilityofallcandidategeomembranesforaproposedspecificapplicationtovariouspermeants.Thewidelydifferentusesofgeomembranesasbarrierstothetransportandmigrationofdifferentgases,vapors,andliquidsunderdifferentserviceconditionsrequiredeterminationsofpermeabilitybytestmethodsthatrelatetoandsimulatetheservice.Geomembranesarenonporoushomogeneousmaterialsthatarepermeableinvaryingdegreestogases,vapors,andliquidsonamolecularscaleinathree-stepprocess(1)bydissolutioninorabsorptionbythegeomembraneontheupstreamside,(2)diffusionthroughthegeomembrane,and(3)desorptiononthedownstreamsideofthebarrier.1.2Therateoftransmissionofagivenchemicalspecies,whetherasasinglepermeantorinmixtures,isdrivenbyitschemicalpotentialorinpracticaltermsbyitsconcentrationgradientacrossthegeomembrane.Variousmethodstoassessthepermeabilityofgeomembranestosinglecomponentpermeants,suchasindividualgases,vapors,andliquidsarereferencedandbrieflydescribed.1.3Varioustestmethodsforthemeasurementofpermeationandtransmissionthroughgeomembranesofindividualspeciesincomplexmixturessuchaswasteliquidsarediscussed.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P85;G33
【国际标准分类号】:13_060_30;17_120_01
【页数】:8P.;A4
【正文语种】: