ASTM D143-1994(2007) 洁净木材小样品试验的标准方法

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【英文标准名称】:StandardTestMethodsforSmallClearSpecimensofTimber
【原文标准名称】:洁净木材小样品试验的标准方法
【标准号】:ASTMD143-1994(2007)
【标准状态】:现行
【国别】:
【发布日期】:1994
【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】:(TestMethod)
【标准水平】:()
【中文主题词】:木材;试样;建筑;样品;施工材料;施工材料;试验
【英文主题词】:clearspecimens;smallclearspecimens;timber;wood
【摘要】:Thesemethodscovertestsonsmallclearspecimensofwoodthataremadetoprovidethefollowing:4.1.1Dataforcomparingthemechanicalpropertiesofvariousspecies,4.1.2Datafortheestablishmentofcorrectstrengthfunctions,whichinconjunctionwithresultsoftestsoftimbersinstructuralsizes(seeMethodsD198andTestMethodD4761),affordabasisforestablishingallowablestresses,and4.1.3Datatodeterminetheinfluenceonthemechanicalpropertiesofsuchfactorsasdensity,localityofgrowth,positionincrosssection,heightoftimberinthetree,changeofpropertieswithseasoningortreatmentwithchemicals,andchangefromsapwoodtoheartwood.1.1Thesemethodscoverthedeterminationofvariousstrengthandrelatedpropertiesofwoodbytestingsmallclearspecimens.1.1.1Thesemethodsrepresentproceduresforevaluatingthedifferentmechanicalandphysicalproperties,controllingfactorssuchasspecimensize,moisturecontent,temperature,andrateofloading.1.1.2SamplingandcollectionofmaterialisdiscussedinPracticeD5536.Sampledata,computationsheets,andcardshavebeenincorporated,whichwereofassistancetotheinvestigatorinsystematizingrecords.1.1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIvaluesaregiveninparenthesesandareprovidedforinformationonly.Whenaweightisprescribed,thebasicinch-poundunitofweight(lbf)andthebasicSIunitofmass(Kg)arecited.1.2Theproceduresforthevarioustestsappearinthefollowingorder:SectionsPhotographsofSpecimens5ControlofMoistureContentandTemperature6RecordofHeartwoodandSapwood7StaticBending8CompressionParalleltoGrain9ImpactBending10Toughness11CompressionPerpendiculartoGrain12Hardness13ShearParalleltoGrain14Cleavage15TensionParalleltoGrain16TensionPerpendiculartoGrain17NailWithdrawal18SpecificGravityandShrinkageinVolume19RadialandTangentialShrinkage20MoistureDetermination21PermissibleVariations22Calibration23