NF P98-149-2000 沥青.术语.混合物组分.施工.产品.技术和工艺
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【英文标准名称】:Asphalt-Terminology-Componentsandcompositionofmixtures-Implementation-Products-Techniquesandprocesses.
【原文标准名称】:沥青.术语.混合物组分.施工.产品.技术和工艺
【标准号】:NFP98-149-2000
【标准状态】:现行
【国别】:法国
【发布日期】:2000-06-01
【实施或试行日期】:2000-06-20
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Bituminousproducts;Carriageways;Components;Composition;Mixtures;Roads;Terminology;Terminologystandard
【摘要】:
【中国标准分类号】:E34
【国际标准分类号】:01_040_93;93_080_20;01_040_75;75_140
【页数】:26P.;A4
【正文语种】:其他
【英文标准名称】:StandardTestMethodforPrecipitatedSilica-SurfaceAreabyMultipointBETNitrogenAdsorption
【原文标准名称】:用多点布-埃-特氮气吸附法对沉积二氧化硅表面面积的标准测试方法
【标准号】:ASTMD1993-2003
【标准状态】:现行
【国别】:
【发布日期】:2003
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D11.20
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;硅酸盐
【英文主题词】:nitrogenadsorptionsurfacearea;precipitatedhydratedsilica;silicas;surfacearea;
【摘要】:Thistestmethodisusedtomeasurethesurfaceareaofprecipitated,hydratedsilicasthatisavailabletothenitrogenmoleculeusingthemultipoint(B.E.T.)method.Solidsadsorbnitrogenand,underspecificconditions,theadsorbedmoleculesapproachamonomolecularlayer.ThequantityinthishypotheticalmonomolecularlayeriscalculatedusingtheBETequation.Combiningthiswiththeareaoccupiedbythenitrogenmoleculeyieldsthetotalsurfaceareaofthesolid.Thistestmethodmeasurestheestimatedquantityofnitrogeninthemonomolecularlayerbyadsorptionatliquidnitrogentemperatureandatseveral(atleastfive)partialpressuresofnitrogen.Beforeasurfaceareadeterminationcanbemadeitisnecessarythatthesilicabestrippedofanymaterialwhichmayalreadybeadsorbedonthesurface.Thestrippingofadsorbedforeignmaterialeliminatestwopotentialerrors.Thefirsterrorisassociatedwiththeweightoftheforeignmaterial.Theseconderrorisassociatedwiththesurfaceareathattheforeignmaterialoccupies.1.1ThistestmethodcoversaprocedurewhichisusedtomeasurethesurfaceareaofprecipitatedhydratedsilicasbytheconventionalBrunauer,Emmett,andTeller(BET)theoryofmultilayergasadsorptionbehaviorusingmultipointdeterminations,similartothatusedforcarbonblackinTestMethodsD4820.Thistestmethodspecifiesthesamplepreparationandtreatment,instrumentcalibrations,requiredaccuracyandprecisionofexperimentaldata,andcalculationsofthesurfacearearesultsfromtheobtaineddata.1.2Thistestmethodisusedtodeterminethenitrogensurfaceareaofprecipitatedsilicaswithspecificsurfaceareasintherangeof1to50hm2/kg(10to500m2/g).1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Theminimumsafetyequipmentshouldincludeprotectivegloves,sturdyeyeandfaceprotection,andmeanstodealsafelywithaccidentalmercuryspills.
【中国标准分类号】:G53
【国际标准分类号】:71_060_20
【页数】:3P.;A4
【正文语种】:
Product Code:SAE J2030
Title:Heavy-Duty Electrical Connector Performance Standard
Issuing Committee:Cttc C2, Electrical Components And Systems
Scope:This SAE Standard encompasses connectors between two cables or between a cable and an electrical component and focuses on the connectors external to the electrical component. This document provides environmental test requirements and acceptance criteria for the application of connectors for direct current electrical systems of 50 V or less in the majority of heavy-duty applications typically used in off-highway machinery. Severe applications may require higher test levels, or field-testing on the intended application.
