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1、命题考点七建筑木材和木制品、玻璃的特性与应用1A410000buildingengineeringtechnology1A412000buildingengineeringvillagematerial1A412000constructionmaterialtestsectionGufenOnlinePropositionseven:propertiesandapplicationsofbuildingwoodandwoodproducts,glassIfyouencounteranydoubtintheprocessoflearning,pleasel
2、ogintothemembercenter,youaskmeanswer,atanytimetocommunicatewiththemajorityofcandidatesfriends![textbookinterpretation]One,wood1.classificationandpropertiesoftreesGenerally,treescanbedividedintotwocategories:Coniferousandbroad-leavedtrees.2.moisturecontentofwood(1)moisturecontent:
3、themoisturecontentofwoodisexpressedbymoisturecontent,whichmeansthepercentageofmoisturecontentinwoodtowooddryingquality.(2)moisturecontentindex:themostimportantwatercontentindexesaffectingthephysicalandmechanicalpropertiesandapplicationofwoodarefibersaturationpointandequilibriummo
4、isturecontent.3..Wetswelling,dryingshrinkageanddeformationofwoodWoodisdeformedonlywhenthecontentofadsorbedwaterinthecellwallchanges,thatis,wetswellingandshrinkage.Duetotheinhomogeneityofwoodstructure,thedeformationofwoodisalsodifferentindifferentdirections;thedirectionofthegraini
5、sthesmallest,theradialdirectionisbigger,andthechorddirectionisthebiggest.Therefore,thecross-sectionsizeandshapeofwetwoodwillchangeobviouslyafterdrying.4.thestrengthofwoodWoodcanbedividedintofourkindsoftensile,compressive,bendingandshearstrengthaccordingtothestateofstress,whileten
6、sile,compressiveandshearstrengtharedividedintohorizontalandtransversestripes.Two,thecharacteristicsandapplicationofbuildingwoodproducts1.solidwoodflooringAccordingtotheshapeofsolidwoodflooring,solidwoodflooringcantapandantiquewoodfloorstenonedsolidwoodflooring,flat(withuniquesurf
7、acestructure,includingplane,convexsurface,drawingsurfaceandspecialcolorofwoodfloor).Accordingtothesurfacefinishingsituation,itcanbedividedintotheuncoatedsolidwoodfloorandthepaintedsolidwoodfloor.Solidwoodflooringhasstrongtexture,goodelasticity,comfortable,beautifulappearanceetc..
8、Theboardmaterialcanbepine,firandothersof
