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【英文标准名称】:StandardGuideforMoistureConditioningofWoodandWood-BaseMaterials
【原文标准名称】:木材和木基材料湿度的调节的标准指南
【标准号】:ASTMD4933-1999(2010)
【标准状态】:现行
【国别】:美国
【发布日期】:1999
【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】:D07.01
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:equilibriummoisturecontent;moistureconditioning;moisturecontent;wood;wood-basedmaterials;Conditioning;Equilibriummoisture;Hysteresiseffects;Moistureanalysis--woodproducts;Relativehumidity(RH);Temperature(applications);Woodprodu
【摘要】:Manyphysicalandmechanicalpropertiesofwoodandwood-basedmaterialschangeinresponsetotheenvironmentalequilibriummoisturecontent,andanycomparisonofthesepropertiesmusttakemoisturecontentintoaccount.Aconsistentbaseforcomparisonamongdifferenttestsamplesanddifferentlaboratoriesisnecessary.Shrinkageanddimensionalchangeinparticulararedependentonmoisturecontent,andtestsinvolvingtheirmeasurementmustbeconductedwithgoodequilibriummoisturecontentcontrol.Conditioningcanalsobeimportantinindustrialsettingswherethereareoptimummoisturecontentlevelsformanyproductsandprocesses,andconformancetotheselevelscanreducelossesinqualityandyield.1.1Thisguidecoversstandardproceduresforconditioningandequilibratingwoodandwood-basedmaterialstoconstantmoisturecontent.Theproceduresapplytosolidwood,wood-basedfiberandparticulatematerialsandpanels,andwoodproductscontainingadhesives.Theyareintendedforuseinresearchanddevelopmentactivities,testinglaboratories,qualitycontrol,andforallotherclassesofproducersandusers.Thisguideincludesbackgroundmaterialontheimportanceofmoisturecontentcontrol,importantdefinitionsandtechnicaldata,possibletypesofapparatus,procedures,andtheimportanceofconditioningtime.Usersshouldrecognizethatthenecessarydegreeofprecisionandbiasvarieswiththeintentionsoftheusers.Someresearchandtesting,forexample,mightrequireveryclosecontrolofmoisturecontent,whereascontrolinanindustrialstoragefacilitymightnotrequiresuchclosecontrol.Thisguideoffersproceduresthatincludethesedifferentrequirements.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thefollowingsafetyhazardscaveatpertainsonlytotheproceduresection,Section6,ofthisguide.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:B69
【国际标准分类号】:79_060_01
【页数】:8P.;A4
【正文语种】:英语