NF T45-103-1992 橡胶工业用原材料.炭黑.分类系统
作者:标准资料网 时间:2024-05-15 07:26:17 浏览:8678
来源:标准资料网
【英文标准名称】:Rawmaterialsfortherubberindustry.Carbonblacks.Classificationsystem.
【原文标准名称】:橡胶工业用原材料.炭黑.分类系统
【标准号】:NFT45-103-1992
【标准状态】:现行
【国别】:法国
【发布日期】:1992-12-01
【实施或试行日期】:1992-12-20
【发布单位】:法国标准化协会(AFNOR)
【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】:G49
【国际标准分类号】:83_040_20
【页数】:6P;A4
【正文语种】:其他
【英文标准名称】:StandardTestMethodforMeasuringEarly-AgeCompressiveStrengthandProjectingLater-AgeStrength
【原文标准名称】:早期抗压强度的测量和后期强度预测用标准试验方法
【标准号】:ASTMC918/C918M-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】:C09.61
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:抗压强度;早期强度;成熟度;潜在强度;预测强度
【英文主题词】:compressivestrength;early-agestrength;maturity;potentialstrength;projectedstrength
【摘要】:Thistestmethodprovidesaproceduretoestimatethepotentialstrengthofaparticulartestspecimenbaseduponitsmeasuredstrengthatanageasearlyas24h.5Theearly-agetestresultsprovideinformationonthevariabilityoftheconcreteproductionprocessforuseinprocesscontrol.Therelationshipbetweenearly-agestrengthoftestspecimensandstrengthachievedatsomelaterageunderstandardcuringdependsuponthematerialscomprisingtheconcrete.Inthistestmethod,itisassumedthatthereisalinearrelationshipbetweenstrengthandthelogarithmofthematurityindex.Experiencehasshownthatthisisanacceptableapproximationfortestagesbetween24hand28daysunderstandardcuringconditions.Theuserofthistestmethodshallverifythatthetestdatausedtodevelopthepredictionequationarerepresentedcorrectlybythelinearrelationship.Iftheunderlyingrelationshipbetweenstrengthandthelogarithmofthematurityindexcannotbeapproximatedbyastraightline,theprincipleofthistestmethodisapplicableprovidedanappropriateequationisusedtorepresentthenon-linearrelationship.Strengthprojectionsarelimitedtoconcretesusingthesamematerialsandproportionsastheconcreteusedtoestablishthepredictionequation.Note18212;Confidenceintervalsdevelopedinaccordancewith10.2arehelpfulinevaluatingprojectedstrengths.Thistestmethodisnotintendedforestimatingthein-placestrengthofconcrete.PracticeC1074providesproceduresforusingthemeasuredin-placematurityindextoestimatein-placestrength.1.1Thistestmethodcoversaprocedureformakingandcuringconcretespecimensandfortestingthematanearlyage.Thespecimensarestoredunderstandard-curingconditionsandthemeasuredtemperaturehistoryisusedtocomputeamaturityindexthatisrelatedtostrengthgain.1.2Thistestmethodalsocoversaprocedureforusingtheresultsofearly-agecompressive-strengthteststoprojectthepotentialstrengthofconcreteatlaterages.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.4Thetextofthisstandardreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q14
【国际标准分类号】:91_100_30
【页数】:6P.;A4
【正文语种】:
【英文标准名称】:Hydrometricdeterminations.Flowmeasurementinopenchannelsusingstructures.Flat-Vweirs
【原文标准名称】:比重测定.构造物的明渠液体流量测量.V形平面溢流堰
【标准号】:BSISO4377-2012
【标准状态】:现行
【国别】:英国
【发布日期】:2012-08-31
【实施或试行日期】:2012-08-31
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:明渠流动;通道;测量规程;流量计量;流量测量;流量计;水力(利)工程;液体流量;明渠;河流;规格;符号;试验;水路;溢流堰;堰(测量)
【英文主题词】:Channelflow;Channels;Determinationprocedures;Flowmeasurement;Flowmeasurements;Flowmeters;Hydraulicengineering;Liquidflow;Openchannels;Rivers;Specifications;Symbols;Testing;Waterways;Weirs;Weirs(measurement)
【摘要】:
【中国标准分类号】:N12
【国际标准分类号】:17_120_20
【页数】:70P;A4
【正文语种】:英语
