【英文标准名称】:ConePenetrationofLubricatingGrease,MethodofTestfor(05.01)
【原文标准名称】:润滑脂的圆锥贯入,(05.01)试验方法
【标准号】:ANSI/ASTMD217-1997
【标准状态】:作废
【国别】:美国
【发布日期】:1997
【实施或试行日期】:
【发布单位】:美国国家标准学会(ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:润滑剂;试验
【英文主题词】:lubricants;testing
【摘要】:
【中国标准分类号】:E36
【国际标准分类号】:75_100
【页数】:
【正文语种】:英语
【英文标准名称】:StandardTestMethodforFlexuralToughnessofFiberReinforcedConcrete(UsingCentrallyLoadedRoundPanel)
【原文标准名称】:纤维增强混凝土的挠性强度的标准试验方法(利用中心负荷圆形板)
【标准号】:ASTMC1550-2010a
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:C09.42
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:energyabsorption;fiber-reinforcedconcrete;flexure;post-crackbehavior;toughness;Concrete;Fiber-reinforcedconcrete;Flexuraltesting--concrete;Postcrackingstrength
【摘要】:Thepost-crackbehaviorofplate-like,fiber-reinforcedconcretestructuralmembersiswellrepresentedbyacentrallyloadedroundpaneltestspecimenthatissimplysupportedonthreepivotssymmetricallyarrangedarounditscircumference.Suchatestpanelexperiencesbi-axialbendinginresponsetoacentralpointloadandexhibitsamodeoffailurerelatedtotheinsitubehaviorofstructures.Thepost-crackperformanceofroundpanelssubjecttoacentralpointloadcanberepresentedbytheenergyabsorbedbythepaneluptoaspecifiedcentraldeflection.Inthistestmethod,theenergyabsorbeduptoaspecifiedcentraldeflectionistakentorepresenttheabilityofafiber-reinforcedconcretetoredistributestressfollowingcracking.Note18212;Theuseofthreepivotedpointsupportsinthetestconfigurationresultsindeterminateout-of-planereactionspriortocracking,howeverthesupportreactionsareindeterminateaftercrackingduetotheunknowndistributionofflexuralresistancealongeachcrack.Thereisalsoachangeintheloadresistancemechanisminthespecimenasthetestproceeds,startingwithpredominantlyflexuralresistanceandprogressingtotensilemembraneactionaroundthecenterastheimposeddeflectionisincreased.Theenergyabsorbeduptoaspecifiedcentraldeflectionisrelatedtothetoughnessofthematerialbutisspecifictothisspecimenconfigurationbecauseitisalsodeterminedbythesupportconditionsandsizeofthespecimen.Selectionofthemostappropriatecentraldeflectiontospecifydependsontheintendedapplicationforthematerial.Theenergyabsorbedupto5mmcentraldeflectionisapplicabletosituationsinwhichthematerialisrequiredtoholdcrackstightlyclosedatlowlevelsofdeformation.Examplesincludefinalliningsinundergroundcivilstructuressuchasrailwaytunnelsthatmayberequiredtoremainwater-tight.Theenergyabsorbedupto40mmismoreapplicabletosituationsinthatthematerialisexpectedtosufferseveredeformationinsitu(forexample,shotcreteliningsinminetunnelsandtemporaryliningsinswellingground).Energyabsorptionuptointermediatevaluesofcentraldeflectioncanbespecifiedinsituationsrequiringperformanceatintermediatelevelsofdeformation.Themotivationforuseofaroundpanelwiththreesupportsisbasedonthewithin-batchrepeatabilityfoundinlaboratoryandfieldexperience.Theconsistencyofthefailuremodethatarisesthroughtheuseofthreesymmetricallyarrangedsupportpivotsresultsinlowwithin-batchvariabilityintheenergyabsorbedbyasetofpanelsuptoaspecifiedcentraldeflection.Theuseofroundpanelsalsoeliminatesthesawingthatisrequiredtoprepareshotcretebeamspecimens.Thenominaldimensionsofthepanelare75mminthicknessand800mmindiameter.Thicknesshasbeenshowntostronglyinfluencepanelperformanceinthistest,whilevariationsindiameterhavebeenshowntoexertaminorinfluenceonperformance.Correctionfactorsareprovidedtoaccountforactualmeasureddimensions.Note28212;Thetargetdimensionsofthepanelspecimenusedinthistestareheldconstantregardlessofthecharacteristicsofaggregateandfibersusedintheconcretecomprisingthespecimen.Post-crackperformancemaybeinfluencedbysizeandboundaryeffectsiflargeaggregateparticlesorlongfibersareusedintheconcrete.Theseinfluencesareacknowledgedandacceptedinthistestmethodbecauseissuesofsizeeffectandfiberalignmentariseinactualstructuresandnosingletestspecimencansuitablymodelstructuresofallsizes.Differencesinpost-crackbehaviorexhibitedinthistestmethodcanbeexpectedrelativetocastfiber-reinforced........
【中国标准分类号】:Q23
【国际标准分类号】:91_100_40
【页数】:14P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 电线电缆 聚氯乙烯护套热失重试验方法 |
| 中标分类： |
电工 >>
电工材料和通用零件 >>
电工材料和通用零件综合 |
| 替代情况： | 被GB/T 2951.11-1994代替 |
| 发布日期： | |
| 实施日期： | 1983-03-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 3页 |
适用范围
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所属分类： 电工 电工材料和通用零件 电工材料和通用零件综合