GB 6089-1985 扳手钻夹头技术条件
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来源:标准资料网
基本信息
| 标准名称： | 扳手钻夹头技术条件 |
| 中标分类： |
机械 >>
金属切削机床 >>
机床辅具与附件 |
| 替代情况： | 被GB/T 6087-1993代替 |
| 发布日期： | 1900-01-01 |
| 实施日期： | 1986-05-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 1页 |
适用范围
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前言
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引用标准
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所属分类： 机械 金属切削机床 机床辅具与附件
【英文标准名称】:StandardTestMethodforDeterminingtheApparentChlorideDiffusionCoefficientofCementitiousMixturesbyBulkDiffusion
【原文标准名称】:用粒状料扩散法测定水泥混合物表面氯化物扩散系数的标准试验方法
【标准号】:ASTMC1556-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:C09.66
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:测定;扩散系数;表观;氯化物;混合物;扩散
【英文主题词】:chloride;concrete;corrosion;diffusion;iontransport;servicelife
【摘要】:Thistestmethodisapplicabletocementitiousmixturesthathavenotbeenexposedtoexternalchlorideions,otherthanthenegligiblequantityofchlorideionexposurefromsamplepreparationusingpotablewater,priortothetest.Thecalculationproceduredescribedinthistestmethodisapplicableonlytolaboratorytestspecimensexposedtoasodiumchloridesolutionasdescribedinthistestmethod.Thiscalculationprocedureisnotapplicabletospecimensexposedtochlorideionsduringcyclicwettinganddrying.Note18212;Thediffusionofionicspeciesinconcreteoccurswithinthefluid-filledpores,cracksandvoidspaces.Theconcentrationandvalenceofotherionicspeciesintheporefluidalsoinfluencetherateofchloridediffusion,andtherefore,theapparentdiffusioncoefficientasdeterminedbythistestprocedure.Inmostcases,thevalueoftheapparentchloridediffusioncoefficientforcementitiousmixtureschangesovertime(SeeNote2).Therefore,apparentdiffusioncoefficientsobtainedatearlyagesmaynotberepresentativeofperformanceinservice.Note28212;Therateofchangeoftheapparentdiffusioncoefficientforcementitiousmixturescontainingpozzolansorblast-furnaceslagistypicallydifferentthanthatformixturescontainingonlyportlandcement.TheapparentchloridediffusioncoefficientisusedinFickrsquo;secondlawofdiffusiontoestimatechloridepenetrationintocementitiousmixturesthatareinasaturatedcondition.TheapparentchloridediffusioncoefficientiscommonlyusedinchlorideingressmodelsbasedonFickrsquo;secondlawofdiffusion.Theapparentdiffusioncoefficientdeterminedbythismethodincludeschemicallyboundchloride,soproperuseoftheapparentchloridediffusioncoefficienttopredictchlorideingressrequiresconsiderationofchloridebinding.Theresistancetochloridepenetrationisaffectedbysuchfactorsastheenvironment,finishing,mixturecomposition,workmanship,curing,andage.1.1Thistestmethodcoversthelaboratorydeterminationoftheapparentchloridediffusioncoefficientforhardenedcementitiousmixtures.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q13
【国际标准分类号】:71_060_99
【页数】:7P.;A4
【正文语种】:
Product Code:SAE AMS5735
Title:Steel Bars, Forgings, Tubing, And Rings, Corrosion And Heatresistant 15cr - 26ni - 1.3mo - 2.1ti - 0 (Cancelled Jul 2002)
Issuing Committee:Ams F Corrosion Heat Resistant Alloys Committee
Scope:
