MIL-STD-1312/1
时间:2024-05-16 09:22:59 来源: 标准资料网 作者：标准资料网 阅读：9818
MIL-STD-1312/1, MILITARY STANDARD: FASTENER TEST METHODS, FASTENER TEST METHODS - METHOD 1, SALT SPRAY (19 AUG 1984) [S/S BY NASM1312-1]., This method covers a procedure for testing fasteners in salt water spray to determine relative resistance to corrosion for maintaining standards of quality, although it does not closely simulate any common conditions of service.
【英文标准名称】:StandardTestMethodforCBR(CaliforniaBearingRatio)ofSoilsinPlace
【原文标准名称】:现场测定土壤加利福尼亚承载比的标准试验方法
【标准号】:ASTMD4429-2009a
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D18.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:bearingratio;CBR;deflection;flexiblepavement;CBR(Californiabearingratio);Soil
【摘要】:Fieldin-placeCBRtestsareusedforevaluationanddesignofflexiblepavementcomponentssuchasbaseandsubbasecourseandsubgradesandforotherapplications(suchasunsurfacedroads)forwhichCBRisthedesiredstrengthparameter.IfthefieldCBRistobeuseddirectlyforevaluationordesignwithoutconsiderationforvariationduetochangeinwatercontent,thetestshouldbeconductedunderoneofthefollowingconditions:(a)whenthedegreeofsaturation(percentageofvoidsfilledwithwater)is80%orgreater,(b)whenthematerialiscoarsegrainedandcohesionlesssothatitisnotsignificantlyaffectedbychangesinwatercontent,or(c)whenthesoilhasnotbeenmodifiedbyconstructionactivitiesduringthetwoyearsprecedingthetest.Inthelast-namedcase,thewatercontentdoesnotactuallybecomeconstant,butgenerallyfluctuateswithinarathernarrowrange.Therefore,thefieldin-placetestdatamaybeusedtosatisfactorilyindicatetheaverageload-carryingcapacity.Anyconstructionactivities,suchasgradingorcompacting,carriedoutsubsequenttothebearingratiotestwillprobablyinvalidatetheresultsofthetest.Soilsandflexiblepavementcomponentsatthesamelocationmayexhibitsignificantlydifferentloaddeflectionrelationships.Nomethodpresentlyexiststoevaluatetheprecisionofagroupofnon-repetitiveplateloadtestsonsoilsandflexiblepavementcomponentsduetothevariabilityofthesematerials.Note18212;Fieldin-placetestsareusedtodeterminetherelativestrengthofsoils,subbase,andsomebasematerialsintheconditionatwhichtheyexistatthetimeoftesting.Suchresultshavedirectapplicationintestsectionworkandinsomeexpedientconstruction,military,orsimilaroperations.Also,asindicatedin4.1,fieldin-placetestscanbeusedfordesignunderconditionsofnominalstabilityofwater,density,andgeneralcharacteristicsofthematerialtested.However,anysignificanttreating,disturbing,handling,compaction,orwaterchangecanaffectthesoilstrengthandmakethepriortotestdeterminationinapplicable,leadingtotheneedforretestandreanalysis.Note28212;Notwithstandingthestatementsonprecisionandbiascontainedinthisstandard:Theprecisionofthistestmethodisdependentonthecompetenceofthepersonnelperformingitandthesuitabilityoftheequipmentandfacilitiesused.AgencieswhichmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting.UsersofthismethodarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliabletesting.Reliabletestingdependsonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1ThistestmethodcoversthedeterminationoftheCaliforniaBearingRatio(CBR)ofsoiltestedinplacebythepenetrationloadofthesoil.Thistestmethodcoverstheevaluationoftherelativequalityofsubgradesoils,butisapplicabletosubbaseandsomebase-coursematerials.Thistestmethodisdesignedtotestin-situmaterialsandcorrespondstoTestMethodD1883.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefor......
【中国标准分类号】:P13
【国际标准分类号】:93_020
【页数】:7P.;A4
【正文语种】:英语
【英文标准名称】:Plastics--Acrylonitrile/butadiene/styrene(ABS)mouldingandextrusionmaterials--Part1:Designation
【原文标准名称】:塑料.丙烯腈-丁二烯-苯乙烯(ABS)模塑和挤塑材料.第1部分:名称与符号
【标准号】:JISK6934-1-1999
【标准状态】:作废
【国别】:日本
【发布日期】:1999-01-20
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JISC)
【起草单位】:TechnicalCommitteeonChemicalProducts
【标准类型】:()
【标准水平】:()
【中文主题词】:挤压;模制;分类系统;丙烯腈-丁二烯-苯乙烯共聚物;塑料;热塑性聚合物;名称与符号
【英文主题词】:thermoplasticpolymers;acrylonitrilebutadienestyrene;moulding(process);extruding;;designations
【摘要】:
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:9P;A4
【正文语种】:日语