【英文标准名称】:Materialsforrailvehicles;generalstructuralsteels
【原文标准名称】:有轨车辆用材料.钢普通结构钢
【标准号】:DIN5512T.1-1975
【标准状态】:作废
【国别】:
【发布日期】:
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:S05
【国际标准分类号】:
【页数】:
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【英文标准名称】:StandardTestMethodforApproximationofOptimumSO3inHydraulicCementUsingCompressiveStrength
【原文标准名称】:用耐压强度测定水凝水泥中SO近似含量的标准试验方法
【标准号】:ASTMC563-2007
【标准状态】:现行
【国别】:
【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(US-ASTM)
【起草单位】:C01.28
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:水泥;建筑;施工材料;硅酸盐水泥;测试
【英文主题词】:blendedhydrauliccement;calciumsulfate;cement;compressivestrength;gypsum;hydrauliccement;optimumsulfatecontent(ofcement);portlandcement;strength(ofcement);sulfatecontent(ofcement)
【摘要】:ThepurposeofthistestmethodistoestimatetheSO3contentforahydrauliccementthatgivesmaximumcompressivestrengthinmortarmadeandcuredat23x00B0;C.ThevalueobtainedisusedtoestablishanappropriatelevelofsulfateinthemanufactureofcementsspecifiedinSpecificationsC150,C595andC1157.InSpecificationsC150andC595itisusedtojustifyexceedingtheprescriptivelimitsforSO3.TheSO3contentofacementgivingmaximumcompressivestrengthisdifferentatdifferentagesofmortar;typicallythisSO3contentishigherat3daysthanthe24-h,andoftenhigherfor7daysthanthatfor3days.Amanufacturercanchoosetheageof24-h,3daysor7daysforspecimensatwhichtodetermineoptimumSO3content.ThistestmethodindicatesoptimumSO3contentforcementinmortarmadeandcuredatastandardtemperatureof23.0x00B1;2.0x00B0;C(73.5x00B1;3.5x00B0;F).TheoptimumSO3increaseswithincreasingtemperatureandmayincreasewhenwater-reducingadmixturesareused.ItshouldnotbeassumedthattheoptimumSO3estimatedinthistestmethodisthesameSO3contentforoptimumperformanceofaconcretepreparedfromthecement.ThetestmethodisapplicabletocementsspecifiedinSpecificationsC150,C595,andC1157.1.1ThistestmethoddescribesthedeterminationofapproximateoptimumSO3formaximumcompressivestrengthat24h,3days,or7daysbymeasuringthechangeinstrengthproducedinhydrauliccementmortarasaresultofsubstitutingcalciumsulfateforaportionofthecement.1.2Thistestmethodreferstothesulfurtrioxide(SO3)contentofthecementonly.Slagcementsandoccasionallyotherhydrauliccementscancontainsulfideorotherformsofsulfur.ThedeterminationofSO3contentbyrapidmethodsmayincludetheseotherforms,andmaythereforeproduceasignificanterror.Ifasignificanterroroccurs,analyzethecementforSO3contentusingthereferencetestmethodofTestMethodsC114forsulfurtrioxide.1.3ValuesstatedasSIunitsaretoberegardedasstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q11
【国际标准分类号】:91_100_10
【页数】:3P.;A4
【正文语种】: