EN ISO 3377-2-2002 皮革.物理和机械试验.撕破力的测定.第2部分:双边撕裂
时间:2024-05-20 11:29:09 来源: 标准资料网 作者：标准资料网 阅读：8737
【英文标准名称】:Leather-Physicalandmechanicaltests;Determinationoftearload-Part2:Doubleedgetear(ISO3377-2:2002);GermanversionENISO3377-2:2002
【原文标准名称】:皮革.物理和机械试验.撕破力的测定.第2部分:双边撕裂
【标准号】:ENISO3377-2-2002
【标准状态】:现行
【国别】:
【发布日期】:2003-10
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;边缘撕裂强度;机械试验;物理试验;皮革;撕破力;材料试验;撕裂扩展试验;抗拉试验;抗扯裂强度;扯裂试验;抗撕裂性;生皮
【英文主题词】:Edgetearstrength;Hides;Leather;Materialstesting;Mechanicaltesting;Physicaltesting;Tearforce;Tearpropagationtests;Tearresistance;Tearstrength;Teartests;Tensiletesting;Testing;Tests
【摘要】:
【中国标准分类号】:Y45
【国际标准分类号】:59_140_30
【页数】:8P.;A4
【正文语种】:英语
【英文标准名称】:StandardSpecificationforPolyethyleneofRaisedTemperature(PE-RT)SDR9Tubing
【原文标准名称】:升温的PE-RT材料标准尺寸比(SDR)为9的管道用标准规范
【标准号】:ASTMF2623-2007
【标准状态】:作废
【国别】:美国
【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(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:美国试验与材料协会;PE;管;塑料管;聚乙烯;提升;温度;管道
【英文主题词】:ASTM;PE;Pipelines;Pipes;Plasticpipes;Polyethylene;Raise;Temperature;Tubing
【摘要】:
【中国标准分类号】:G33
【国际标准分类号】:23_040_20
【页数】:6P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforAutogenousStrainofCementPasteandMortar
【原文标准名称】:水泥浆和水泥砂浆自应力的标准测试方法
【标准号】:ASTMC1698-2009
【标准状态】:现行
【国别】:
【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】:C09.68
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:autogenousstrain;cementpaste;lengthchange;mortar
【摘要】:Autogenousstrainistheself-createdbulkstrainofcementpaste,mortar,orconcreteduringhardeningatconstanttemperature.Inconventionalconcrete,autogenousshrinkagestrainisgenerallynegligible,butinconcretewithlowwater-cementitiousmaterialsratio(w/cm)orwithsilicafumeitmaybeconsiderable(1).Restraintoftheautogenousstrainbyaggregatesoradjoiningstructuralmembersmayresultinformationofmicroandmacrocracksthatimpairstrength,durabilityandaesthetics.Cracksmayalsobeaproblemwithregardtohygieniccleaningofsurfaces.Anaccuratemeasurementoftheautogenousstrainofcementitiousmixtureswithloww/cmisimportantforevaluatingtheriskofearly-agecrackingofconcretestructures.Measurementsofautogenousstrainhavebeencarriedoutusingeithervolumetricorlinearmethods.Bothmethodsmayshowevidenceofsignificantartifacts(1);therefore,resultsofthetwomethodsmaydisagreeconsiderablyifnotcarriedoutproperly.Asealed,flexiblecorrugatedmoldsystem(2)combinestheadvantagesoflinearandvolumetricmeasurementofautogenousstrain,whileavoidingmostoftheirdisadvantages.Themoldeffectivelypreventsmoisturelossandminimizesrestrainttovolumechangeduringhardening.Moreover,resultsobtainedwiththecorrugatedmoldsystemagreewiththosefromthevolumetricmethod,oncesomeartifacts,inparticularwaterabsorptionthroughthemembraneusedtocontainthetestspecimen,havebeeneliminatedinthelatter(3,4).Thecorrugatedmoldsystemiseasiertouseandshowsbetterrepeatabilitythanthevolumetrictechnique(3,4).MeasurementswiththecorrugatedmoldsystemareingoodagreementwithunrestrainedlengthchangemeasurementsobtainedusingTestMethodC157/C157Mwithsealedspecimens(5);however,TestMethodC157/C157Mdoesnotallowmeasurementoftheshrinkageoccurringbefore24h(5).Thistestmethodcanbeusedtoevaluatetheeffectsofcementitiousmaterials,admixtures,andmixtureproportionsonautogenousshrinkagestrainofpasteormortarspecimens.Theautogenousshrinkagestrainofmortarspecimenswillbelessthanthatofpastespecimensforthesamew/cm.Theautogenousshrinkagestrainofconcretewillbelessthanthatofmortarforthesamew/cm.Thenominalmaximumaggregatesizeformortarusedinthistestmethodis4.75mm.1.1Thistestmethodmeasuresthebulkstrainofasealedcementpasteormortarspecimen,includingthosecontainingadmixtures,varioussupplementarycementitiousmaterials(SCM),andotherfinematerials,atconstanttemperatureandnotsubjectedtoexternalforces,fromthetimeoffinalsettinguntilaspecifiedage.Thisstrainisknownasautogenousstrain.Autogenousstrainismostsignificantinconcretewithlowwater-cementitiousmaterialsratio(w/cm)(SeeNote1).Note18212;Alowwater-cementitiousmaterialsratio(w/cm)canbeconsideredtobeawatertocementratioof0.40orlowerforthistest.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthe......
【中国标准分类号】:Q11
【国际标准分类号】:91_100_10
【页数】:8P.;A4
【正文语种】: