命题考点七建筑木材和木制品、玻璃的特性与应用

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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1A410000buildingengineeringtechnology1A412000buildingengineeringvillagematerial1A412000construetionmaterialtestsectionGufenOnlinePropositionseven:propertiesandapplicationsofbuildingwoodandwoodproducts,glassIfyouencounteranydoubtin

2、theprocessoflearning,pleaselogintothemembercenter,youaskmeanswer,atanytimetocommunicatewiththemajorityofcandidatesfriends![textbookinterpretation.One,wood1.classificationandpropertiesoftreesGenerally,treescanbedividedintotwocategories:Coniferousandbroa

3、d-leavedtrees・2.moisturecontentofwood(1)moisturecontent:themoisturecontentofwoodisexpressedbymoisturecontent,whichmeansthepercentageofmoisturecontentinwoodtowooddryingquality.(2)moisturecontentindex:themostimportantwatercontentindexesaffectingthephysic

4、alandmechanicalpropertiesandapplicationofwoodarefibersaturationpointdndequilibriummoisturecontent・1.・Wetswelling,dryingshrinkageanddeformationofwoodWoodisdeformedonlywhenthecontentofadsorbedwaterinthecellwallchanges,thatis,wetswellingandshrinkage・Dueto

5、theinhomogeneityofwoodstructure,thedeformationofwoodisalsodifferentindifferentdirections:thedirectionofthegrainisthesmallest,theradialdirectionisbigger,andthechorddirectionisthebiggest・Therefore,thecross-sectionsizeandshapeofwetwoodwillchangeobviouslya

6、fterdrying・2.thestrengthofwoodWoodcanbedividedintofourkindsoftensile,compressive,bendingandshearstrengthaccordingtothestateofstress,whiletensile,compressiveandshearstrengtharedividedintohorizontalandtransversestripes・Two,thecharacteristicsandapplicatio

7、nofbuildingwoodproducts1.solidwoodflooringAccordingtotheshapeofsolidwoodflooring,solidwoodflooringcantapandantiquewoodfloorstenonedsolidwoodflooring,flat(withuniquesurfacestructure,includingplane,convexsurface,drawingsurfaceandspecialcolorofwoodfloor).

8、Accordingtothesurfacefinishingsituation,itcanbedividedintotheuncoatedsolidwoodfloorandthepaintedsolidwoodfloor・Solidwoodflooringhasstrongtexture,goodelasticity,comfortable,beautifulappearanceetc・・Theboardmaterialcanbepine,firandothersof