Product Code:SAE ARP1961
Title:Gearbox - Airplane Mounted Accessory
Issuing Committee:Ae-6 Starting Systems And Auxiliary Power Committee
Scope:This SAE Aerospace Recommended Practice (ARP) addresses the characteristics required for the definition, development, and acquisition of a satisfactory airframe mounted accessory gearbox (AMAG).【英文标准名称】:StandardTestMethodsforLaboratoryCompactionCharacteristicsofSoilUsingStandardEffort(12400ft-lbf/ft3(600kN-m/m3))
【原文标准名称】:用标准作用力(12400ft-lbf/ft(600kN-m/m))测量土壤实验室压实特性的标准试验方法
【标准号】:ASTMD698-2007e1
【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】:D18.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:建筑;施工材料;含水量;土壤;测试
【英文主题词】:compactioncharacteristics;density;impactcompaction;laboratorytests;moisture-densitycurves;proctortest;soil;soilcompaction;standardeffort
【摘要】:1.1Thesetestmethodscoverlaboratorycompactionmethodsusedtodeterminetherelationshipbetweenmoldingwatercontentanddryunitweightofsoils(compactioncurve)compactedina4or6-in.(101.6or152.4-mm)diametermoldwitha5.50-lbf(24.5-N)rammerdroppedfromaheightof12.0in.(305mm)producingacompactiveeffortof12400ft-lbf/ft3(600kN-m/m3).Note1TheequipmentandproceduresaresimilarasthoseproposedbyR.R.Proctor(EngineeringNewsRecord-September7,1933)withthisonemajorexception:hisrammerblowswereappliedas"12inchfirmstrokes"insteadoffreefall,producingvariablecompactiveeffortdependingontheoperator,butprobablyintherange15000to25000ft-lbf/ft3(700to1200kN-m/m3).Thestandardefforttest(see)issometimesreferredtoastheProctorTest.1.1.1Soilsandsoil-aggregatemixturesaretoberegardedasnaturaloccurringfine-orcoarse-grainedsoils,orcompositesormixturesofnaturalsoils,ormixturesofnaturalandprocessedsoilsoraggregatessuchasgravelorcrushedrock.Hereafterreferredtoaseithersoilormaterial.1.2Thesetestmethodsapplyonlytosoils(materials)thathave30%orlessbymassofparticlesretainedonthe3/4-in.(19.0-mm)sieveandhavenotbeenpreviouslycompactedinthelaboratory;thatis,donotreusecompactedsoil.1.2.1Forrelationshipsbetweenunitweightsandmoldingwatercontentsofsoilswith30%orlessbymassofmaterialretainedonthe3/4-in.(19.0-mm)sievetounitweightsandmoldingwatercontentsofthefractionpassing3/4-in.(19.0-mm)sieve,seePracticeD4718.1.3Threealternativemethodsareprovided.Themethodusedshallbeasindicatedinthespecificationforthematerialbeingtested.Ifnomethodisspecified,thechoiceshouldbebasedonthematerialgradation.1.3.1MethodA:Mold4-in.(101.6-mm)diameter.MaterialPassingNo.4(4.75-mm)sieve.LayersThree.BlowsperLayer25.UsageMaybeusedif25%orless(seeSection1.4)bymassofthematerialisretainedontheNo.4(4.75-mm)sieve.OtherUsageIfthisgradationrequirementcannotbemet,thenMethodCmaybeused.1.3.2MethodBMold4-in.(101.6-mm)diameter.MaterialPassing3/8-in.(9.5-mm)sieve.LayersThree.BlowsperLayer25.UsageMaybeusedif25%orless(seeSection)bymassofthematerialisretainedonthe3/8-in.(9.5-mm)sieve.OtherUsageIfthisgradationrequirementcannotbemet,thenMethodCmaybeused.1.3.3MethodC-Mold6-in.(152.4-mm)diameter.MaterialPassing3/4-in.(19.0-mm)sieve.LayersThree.BlowsperLayer56.UsageMaybeusedif30%orless(seeSection1.4)bymassofthematerialisretainedonthe3/4-in.(19.0-mm)sieve.1.3.4The6-in.(152.4-mm)diametermoldshallnotbeusedwithMethodAorB.Note2Resultshavebeenfoundtovaryslightlywhenamaterialistestedatthesamecompactiveeffortindifferentsizemolds,withthesmallermoldsizetypicallyyieldinglargervaluesofdensity/unitweight(,pp.21+).1.4Ifthetestspecimencontainsmorethan5%bymassofoversizefraction(coarsefraction)andthematerialwillnotbeincludedinthetest,correctionsmustbemadetotheunitmassandmoldingwatercontentofthespecimenortotheappropriatefield-in-placedensitytestspecimenusingPracticeD4718.1.5Thistestmethodwillgenerallyproduceawell-definedmaximumdryunitweightfornon-freedrainingsoils.Ifthistestmethodisusedforfree-drainingsoilsthemaximumunitweightmaynotbewelldefined,andcanbelessthanobtainedusingTestMethodsD4253.1.6AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026,unlesssupersededbythisst......
【中国标准分类号】:P13
【国际标准分类号】:93_020
【页数】:13P.;A4
【正文语种】: