ASTM C215-2008 混凝土试样的基本横向、纵向和扭转振动频率的标准试验方法

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【英文标准名称】:StandardTestMethodforFundamentalTransverse,Longitudinal,andTorsionalFrequenciesofConcreteSpecimens
【原文标准名称】:混凝土试样的基本横向、纵向和扭转振动频率的标准试验方法
【标准号】:ASTMC215-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:C09.64
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:dynamicmodulusofrigidity;dynamicPoisson'sratio;dynamicYoung'smodulusofelasticity;forcedresonance;fundamentalresonantfrequency;impactresonance;nondestructivetesting;Frequencymeasurements;Fundamentalresonantfrequencies;Lo
【摘要】:Thistestmethodisintendedprimarilyfordetectingsignificantchangesinthedynamicmodulusofelasticityoflaboratoryorfieldtestspecimensthatareundergoingexposuretoweatheringorothertypesofpotentiallydeterioratinginfluences.Thetestmethodmayalsobeusedtomonitorthedevelopmentofdynamicelasticmoduluswithincreasingmaturityoftestspecimens.Thevalueofthedynamicmodulusofelasticityobtainedbythistestmethodwill,ingeneral,begreaterthanthestaticmodulusofelasticityobtainedbyusingTestMethodC469.Thedifferencedepends,inpart,onthestrengthleveloftheconcrete.Theconditionsofmanufacture,themoisturecontent,andothercharacteristicsofthetestspecimens(seesectiononTestSpecimens)materiallyinfluencetheresultsobtained.Differentcomputedvaluesforthedynamicmodulusofelasticitymayresultfromwidelydifferentresonantfrequenciesofspecimensofdifferentsizesandshapesofthesameconcrete.Therefore,itisnotadvisabletocompareresultsfromspecimensofdifferentsizesorshapes.1.1Thistestmethodcoversmeasurementofthefundamentaltransverse,longitudinal,andtorsionalresonantfrequenciesofconcreteprismsandcylindersforthepurposeofcalculatingdynamicYoung''smodulusofelasticity,thedynamicmodulusofrigidity(sometimesdesignatedasx201C;themodulusofelasticityinshearx201D;),anddynamicPoisson''sratio.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q13
【国际标准分类号】:91_100_30
【页数】:7P.;A4
【正文语种】:英语