【英文标准名称】:StandardTestMethodforMaximumMediaDensityforDeadLoadAnalysisofGreenRoofSystems
【原文标准名称】:新暴露顶层系统静荷载分析用最大介质密度的标准试验方法
【标准号】:ASTME2399-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:E60.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:分析;试验;屋顶系统;密度;屋顶;恒荷载;介质;新的
【英文主题词】:greenroof;maximumdensity;media;waterpermeability;waterretention
【摘要】:Thistestmethoddescribessimplelaboratorymethodsthatprovidereproduceablemeasurementsofcriticalmediaproperties,andpermitdirectcomparisonstobemadebetweendifferentmediamaterials.Thedensityofmixedmediamaterialswillvarydependingonthedegreetowhichtheyaresubjectedtocompactionandthelengthoftimethatthematerialisallowedtohydrateandsubsequentlydrain.Mostgreenroofmediamaterialshavealargecapacitytoabsorbandretainmoisture.Furthermore,moisturewilldraingraduallyfromthemediafollowingahydrationcycle.Themaximummediadensitymeasuredinthisprocedureapproachesthedensityatthetheoreticalsaturationpoint.Existingmethodsformeasuringthecapillary-moisturerelationshipforsoils(TestMethodD2325)relyonsamplepreparationprocedures(TestMethodsD698)thatarenotconsistentwiththeconditionsassociatedwiththeplacementofgreenroofmediamaterials.Thisprocedureisintendedtoprovideareproduciblelaboratoryprocedureforpredictingthemaximummediadensity,moisturecontent,andwaterpermeabilityunderconditionsthatmorecloselyreplicatefieldconditionsongreenroofs.Thevalueofthistestmethodtothegreenroofdesigneristhatitprovidesanobjectivemeasureofmaximumprobablemediadensity(underdrainedconditions)forestimatingstructuralloads.Italsoprovidesamethodforestimatingthelowerlimitforthewaterpermeabilityofthein-placemedia.Thislattervalueisimportantwhenconsideringdrainageconditionsingreenroofs.Finally,themaximummediawaterretentionhasbeenshowntobeausefulindicatorofthemoistureretentionpropertiesofgreenroofmedia.1.1Thistestmethodcoversaprocedurefordeterminingthemaximummediadensityforpurposesofestimatingthemaximumdeadloadforgreenroofassemblies.Themethodalsoprovidesameasureofthemoisturecontentandthewaterpermeabilitymeasuredatthemaximummediadensity.1.2Thisprocedureissuitableforgreenroofmediathatcontainnomorethan30%organicmaterialasmeasuredusingthelossonignitionprocedureTestMethodsF1647,MethodA.1.3Themaximummediadensityandassociatedmoisturecontentmeasuredinthisprocedureappliestodrainedconditionsnearthesaturationpoint.1.4Thetestmethodisintendedtoemulateverticalpercolationratesforwateringreenroofs.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesandtodeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P32
【国际标准分类号】:91_060_20
【页数】:4P.;A4
【正文语种】:


MIL-PRF-32150A, PERFORMANCE SPECIFICATION: STATIC AUTOMATIC BUS TRANSFER SWITCH (SABT) ON SURFACE AND SUBMARINE NAVAL VESSELS (07 JUN 2007)., This specification covers the Static Automatic Bus Transfer Switch (SABT), herein referred to as the SABT (see 6.4.23) or the unit, for use on surface and submarine naval vessels. Requirements for Automatic Bus Transfer Switches (ABTs) and Manual Bus Transfer Switches (MBTs) are not covered in this specification. MIL-PRF-17773 specifies the requirements for ABTs and MBTs.