【英文标准名称】:StandardTestMethodforTime-Dependent(Creep)DeformationUnderConstantPressureforGeosyntheticDrainageProducts
【原文标准名称】:土工合成排水产品用常压下随时间变化的(蠕变)变形用标准试验方法
【标准号】:ASTMD7406-2007
【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】:D35.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:蠕变;变形;排水;土工合成的;土工织物;压力;测试时间
【英文主题词】:compressivecreep;creeprupture;geosynthetic
【摘要】:Theperformancecharacteristicsofadrainagegeosyntheticaredirectlyrelatedtotheintegrityundercompressiveloading.Iftheproductissensitivetocompressivecreep,itsflowcapacitycouldbegreatlyreducedorevenshutoffcompletely.Thecreepsensitivityofacandidategeosyntheticcanbetestedatfield-simulatednormalstressandpotentiallyshearstresses.Thistestmethoddoesnotevaluatetheeffectofcreepofageotextilefilteroradjacentmembrane.Compressioncreepasitrelatestoreductioninflowcapacityofageosyntheticdrainageproductismanufacturerandproductspecific.Forexample,a10%reductioninoriginalthicknessofageonetmadebymanufacturerAdoesnotnecessarilyequalthesamereductioninflowcapacityasa10%reductioninthicknessofthesameoranothertypeofgeonetmadebymanufacturerB.Thiscreepdatahasismeritdirectlytotheenduser,becauseitcanbeeasilyinterpretedtoresultintoareductionfactorforcreep.TheReductionfactorcanthenbeusedtoderiveanallowableflowrate.1.1Thistestmethodisusedtodeterminetheunconfinedcompressivecreepcharacteristicsofdrainagegeotextiles,geocomposites,geonets,oranyothergeosyntheticassociatedwithdrainageataconstanttemperature,whensubjectedtoaconstantcompressivestress.1.2Thistestmethodisintendedforuseasanunconfinedcompressiveperformancecreeptestonly.ForadetailedprocedureonhowtoestablishanindextestseetheENstandard1897.Forperformancetests,thespecimenshallbesubjectedtothesite-specificliquidand/orthesite-specificstress(normalandpotentiallyshearstress).Note18212;Resultsachievedfromunconfinedcompressiveperformancecreepmaydifferfromtestingperformedunderconfinedconditions.1.3Becauseofthechangingnatureofthegeosyntheticindustry,andthewidevarietyofproductsalreadyavailable,thisparticulartestmethodmayhavetobeslightlymodifiedforunconfinedcompressioncreeptestingofsomeproducts..1.4ThevaluesgiveninSIunitsaretobeconsideredasthestandard.Thevaluesgiveninparenthesesareforinformationonly.ThisstandardcoversthespecificproceduresandtestconditionsthatareapplicableforexposureofunreinforcedpolyolefingeomembranestofluorescentUVradiationandcondensation.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W59
【国际标准分类号】:59_080_70
【页数】:4P.;A4
【正文语种】:


【英文标准名称】:Electricalinstallationsforlightingandbeaconingofaerodromes-Technicalrequirementsforaeronauticalgroundlightingcontrolandmonitoringsystems-Unitsforselectiveswitchingandmonitoringofindividuallamps;GermanversionEN50490:2008
【原文标准名称】:飞机场的照明和灯塔用电气装置.航空地面照明控制和监测系统用技术要求.选择性交换用装置和个别灯的监测
【标准号】:EN50490-2008
【标准状态】:现行
【国别】:
【发布日期】:2009-04
【实施或试行日期】:2009-04-01
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:空中交通管制;飞机场;机场导航灯;航空港;电路;控制系统;定义;电连接;电气工程;电气装置;灯;照明设备;监视装置;运行监控系统;选择的;信号装置;信号系统;信号;规范(验收);监督(认可);试验;交通控制系统
【英文主题词】:Airtrafficcontrol;Airfields;Airportnavigationlights;Airports;Circuits;Controlsystems;Definitions;Electricconnection;Electricalengineering;Electricalinstallations;Lamps;Lightingplants;Monitoringdevice;Operationalmonitoringsystems;Selective;Signaldevices;Signalsystems;Signals;Specification(approval);Surveillance(approval);Testing;Trafficcontrolsystems
【摘要】:
【中国标准分类号】:V56
【国际标准分类号】:93_120
【页数】:17P.;A4
【正文语种】:英语