【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】:ASTMC215-2002
【标准状态】:现行
【国别】:
【发布日期】:2002
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:C09.64
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:试验;施工材料;试样;混凝土;切向;建筑;变形;负荷
【英文主题词】:dynamicmodulusofrigidity;dynamicPoisson'sratio;dynamicYoung'smodulusofelasticity;forcedresonance;fundamentalresonantfrequency;impactresonance;nondestructivetesting;
【摘要】:Thistestmethodisintendedprimarilyfordetectingsignificantchangesinthedynamicmodulusofelasticityoflaboratoryorfieldtestspecimensthatareundergoingexposuretoweatheringorothertypesofpotentiallydeterioratinginfluences.Thevalueofthedynamicmodulusofelasticityobtainedbythistestmethodwill,ingeneral,begreaterthanthestaticmodulusofelasticityobtainedbyusingTestMethodC469.Thedifferencedepends,inpart,onthestrengthleveloftheconcrete.Theconditionsofmanufacture,themoisturecontent,andothercharacteristicsofthetestspecimens(seesectiononTestSpecimens)materiallyinfluencetheresultsobtained.Differentcomputedvaluesforthedynamicmodulusofelasticitymayresultfromwidelydifferentresonantfrequenciesofspecimensofdifferentsizesandshapesofthesameconcrete.Therefore,itisnotadvisabletocompareresultsfromspecimensofdifferentsizesorshapes.1.1Thistestmethodcoversmeasurementofthefundamentaltransverse,longitudinal,andtorsionalfrequenciesofconcreteprismsandcylindersforthepurposeofcalculatingdynamicYoung'smodulusofelasticity,thedynamicmodulusofrigidity(sometimesdesignatedas"themodulusofelasticityinshear"),anddynamicPoisson'sratio.1.2valuesinSIunitsarethestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P25
【国际标准分类号】:91_100_30
【页数】:7P.;A4
【正文语种】:


【英文标准名称】:Ironores-Determinationoftitanium-Diantipyrylmethanespectrophotometricmethod
【原文标准名称】:铁矿石.钛含量的测定.二氨替比林甲烷分光光度法
【标准号】:ISO4691-2009
【标准状态】:现行
【国别】:国际
【发布日期】:2009-06
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC102
【标准类型】:()
【标准水平】:()
【中文主题词】:化学分析和试验;组分;测定;含量测定;铁矿石;数学计算;矿物;金属矿物;抽样方法;分光光度法;试验;钛
【英文主题词】:Chemicalanalysisandtesting;Composition;Determination;Determinationofcontent;Ironores;Mathematicalcalculations;Minerals;Ores;Samplingmethods;Spectrophotometry;Testing;Titanium
【摘要】:
【中国标准分类号】:D31
【国际标准分类号】:73_060_10
【页数】:13P;A4
【正文语种】:英语