Product Code:SAE MAM2301
Title:Steel Cleanliness, Aircraft Quality Steel Magnetic Particle Inspection Procedure Metric (Si) Measurement
Issuing Committee:Ams E Carbon And Low Alloy Steels Committee
Scope:This specification covers steel cleanliness requirements in SI (metric) units for aircraft-quality ferro-megnetic steels, other than hardenable corrosion-resistant steels, by magnetic particle inspection methods.【英文标准名称】:StandardTestMethodforEvaluatingPlasticShrinkageCrackingofRestrainedFiberReinforcedConcrete(UsingaSteelFormInsert)
【原文标准名称】:限制纤维加筋混凝土的塑料收缩破裂评定的标准试验方法(用一个钢格子插入物)
【标准号】:ASTMC1579-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:C09.42
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:条件;裂开;评定;形式;插入;塑料;加筋混凝土;收缩;钢;试验
【英文主题词】:crackwidth;evaporation;fiber-reinforcedconcrete;plasticshrinkagecracking;restrainedshrinkagecracking
【摘要】:Thetestmethodisintendedtoevaluatetheeffectsofevaporation,settlement,andearlyautogenousshrinkageontheplasticshrinkagecrackingperformanceoffiberreinforcedconcreteuptoandforsomehoursbeyondthetimeoffinalsetting(SeeTerminologyC125).Themeasuredvaluesobtainedfromthistestmaybeusedtocomparetheperformanceofconcreteswithdifferentmixtureproportions,concreteswithandwithoutfibers,concretescontainingvariousamountsofdifferenttypesoffibers,andconcretescontainingvariousamountsandtypesofadmixtures.Formeaningfulcomparisons,theevaporativeconditionsduringtestshallbesufficienttoproduceanaveragecrackwidthofatleast0.5mminthecontrolspecimens(2,5)(SeeNote2).Inaddition,theevaporationratefromafreesurfaceofwatershallbewithinx00B1;5%foreachtest.Note28212;Toachieveevaporationratesthatresultinacrackofatleast0.5mminthecontrolspecimens,itmaybenecessarytouseanevaporationratehigherthanthatdiscussedinNote1.Thismethodattemptstocontrolatmosphericvariablestoquantifytherelativeperformanceofagivenfreshconcretemixture.Sincemanyothervariablessuchascementfineness,aggregategradation,aggregatevolume,mixingprocedures,slump,aircontent,concretetemperatureandsurfacefinishcanalsoinfluencepotentialcracking,attentionshallbepaidtokeeptheseasconsistentaspossiblefrommixturetomixture.1.1Thistestmethodcomparesthesurfacecrackingoffiberreinforcedconcretepanelswiththesurfacecrackingofcontrolconcretepanelssubjectedtoprescribedconditionsofrestraintandmoisturelossthataresevereenoughtoproducecrackingbeforefinalsettingoftheconcrete.1.2Thistestmethodcanbeusedtocomparetheplasticshrinkagecrackingbehaviorofdifferentconcretemixturescontainingfiberreinforcement.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.(Warning-freshhydrauliccementitiousmixturesarecausticandmaycausechemicalburnstoskinandtissueuponprolongedexposure.)
【中国标准分类号】:Q13
【国际标准分类号】:91_100_40
【页数】:7P.;A4
【正文语种】: