建筑專業(yè)英語-08 Building Materials_第1頁
建筑專業(yè)英語-08 Building Materials_第2頁
建筑專業(yè)英語-08 Building Materials_第3頁
建筑專業(yè)英語-08 Building Materials_第4頁
建筑專業(yè)英語-08 Building Materials_第5頁
已閱讀5頁,還剩14頁未讀, 繼續(xù)免費閱讀

下載本文檔

版權說明:本文檔由用戶提供并上傳,收益歸屬內容提供方,若內容存在侵權,請進行舉報或認領

文檔簡介

Unit8

BuildingMaterials建筑材料DialoguePassageAExercisesObjectives單擊進入單擊進入單擊進入單擊進入TeachingStepsObjectives3.Introducesomereadingskills1.Tellushowtopourconcreteandhowtocureit.2.Talkaboutvarioustypesofcement.主菜單DIALOGUE

A:Concreteisabuildingmaterialofmoderntimes.Whendiditappear?

B:Iamafraidyoumadethesamemistakeasmanypeopledo.Asamatteroffact,itshistorybeganwiththeRomans,whousedittobuildtheir

aqueductsandamphitheatres.ColosseuninRomePantheoninRome主菜單A:AsfarasIknow,concreteisamixtureofwater,gravelandsandwithPortlandcement.Astheworkmenareconcerned,addingplentyofwatermakesplacementoftheconcreteeasier.B:Youmustrememberthatthegreatertheproportionofwaterinwater-cementratiois,theweakerthefinalconcretewillbe.Whenanexcessiveamountofwaterhasbeenused,therewillbeanexcessivenumberofvoids,whichmaycausetheconcretetoleakbadly.DIALOGUE水灰比A:Oh,Isee.HowCanitbecured?B:Thetimeduringwhichconcretehydratesandincreasesinstrengthisitscuringperiod.Throughoutthecuringperiod,therefore,alltheexposedsurfacesoftheconcretemustbekeptmoist.Onlyinthiswaywilltheconcretebecomeincreasinglystronger,denserandmoreimpervioustowater.DIALOGUE養(yǎng)護期A:Howlongisthecuringperiod?B:Theconcretemustbekeptcontinuallymoistfor14daysandlongerifatallpossible.water

gravel

sand混凝土的組成thecompositionofconcretecement混凝土的養(yǎng)護

concretecuringThesurfaceiscoveredtokeepitmoist.DIALOGUE1.material:withwhichsomethingismade2.cement:greypower(madebyburninglimeandclay)which,afterbeingwetted,becomeshardandisusedforbuildingWordsandPhrases3.aqueduct:astructureofcarryingwater,usuallybuiltlikeabridgeacrossavalleyorlowground4.amphitheatre:acircularbuildingwithoutaroofandwithrowsofseatsthatriseinstepsaroundanopenspace,oftenusedinancientGreeceandRomeforpublicentertainment5.Portlandcement:anameofplaceinAmericawhereitisfamousforitscement返回返回返回返回返回8.hydrate:chemicalcompoundofwaterwithothersubstances9.curingperiod:thetimeduringwhichconcretehydratesandincreases10.moist:wet11.impervious:portion&ratio:

relationbetweentwoamountsdeterminedbythenumberoftimesonecontainstheothervoid:empty,vacantWordsandPhrases

返回返回返回返回返回返回BuildingMaterialsThematerialsarethebasicelementsofanybuilding.Buildingmaterialsmaybeclassifiedintothreegroups,accordingtothepurposestheyareusedfor.

Structuralmaterialsarethosethatholdthebuildingup,keepitrigid,formitsoutercoveringofwallsandroof,anddivideitsinteriorintorooms.Inthesecondgrouparematerialsfortheequipmentsinsidethebuilding,suchastheplumbing,heatingandlightingsystems.Finally,therearematerialsthatareusedtoprotectordecorateothermaterials.主菜單structuralmaterialsequipmentsmaterialsTheClassificationofConstructionMaterialsotherdecoratingmaterialsTheclassificationofconstructionmaterialsSteelandconcretearethemostwidelyusedstructuralmaterialstoday.Steelistrulyanall-aroundmaterial.Itisnearlyasdurableasstone.Butitmustbepaintedtopreventitfromrusting.Inmodernconstructionsteelisusedforthesupportingframeworkoflargebuildings.steelBuildingMaterials

Cementisanimportantbuildingmaterial.OfthevariousPortlandcements,thefollowingvarietiesarenowgenerallyavailablefromthemarketsintheindustrializedcountries.OrdinaryPortlandcement,whichisthecheapest;(普通硅酸鹽水泥,這是最便宜的)

(2)Rapid-hardeningcement,whichisslightlymoreexpensivethan(1);(快硬水泥,比普通硅酸鹽水泥略貴)(3)Sulphate-resistingcement;(耐硫酸鹽水泥)concreteLang-churchinFranceBuildingMaterials(4)Air-entrainingcementwhichgreatlyimprovesthefrostresistanceoftheconcrete.;(加氣水泥,大大改善混凝土的抗凍性)(5)Low-heatcementformassiveconstructionsuchasdams;(低熱水泥,用于大體積建筑,如大壩)(6)High-aluminacement,whichreachesaPortland28-daystrengthin24hourswithcorrespondinghighheat.Itscolorisnormallyblack.(高礬土水泥,通常為黑色,高礬土水泥經過24小時即可達到硅酸鹽水泥28天內才能達到的強度,同時發(fā)出高熱)

(7)Anotherhigh-aluminacement,whichisusedforfurnacelinings,iswhite.Itisseveraltimesmoreexpensivethantheblackvariety.(用作爐襯的高礬土水泥,呈白色,它比黑色高礬土水泥要昂貴幾倍。)BuildingMaterialsTheabove-mentionedcementsarewidelyusedontheconstructionsite.Nowlet’stalkaboutpipes.Pitchfiberisaneasilyjoinedpipeanditisasstrongasstonewarepipes,butitisnotsoresistanttoallcorrosiveorhotliquids.Asbestoscementpipes,ontheotherhand,canbeusedforliquidswithalmostanypurpose.Themoreexpensivesheetisnailable,almostasstrongaswoodandfullyfireproof.Thecheapersheetiseasilybrokenbyshockorpressureorundertheeffectofaframe.Plasticshavebeenwidelyusedforavarietyofaccessoryrolesinbuildingsincludingpanels,drainpipesanddecorativeceilings.BuildingMaterialspitchfiberpipeasbestoscementsheetplasticssheetCompositematerialsaregainingimportanceinbuildinghomes.Amodernmaterialinhousebuildingisglass-reinforcedpolyesterresin.Panelsofthismaterialarecompositesthemselves.Materialsusedfordoorsandwindowframesaretimber,steelandaluminumalloys.woodenwindowswrappedwithaluminum鋁包木窗plastic-steelwindows塑鋼窗aluminum

windows鋁合金窗BuildingMaterialsEXERCISES1.Theweatherforecastsaysthattherewillbeaheavy____heretomorrow.2.Thepeopleinthearea

floods.3.Thesehousescatchfireeasilyasthebuildingmaterialsaren’t

.4.Aseverybody

溫馨提示

  • 1. 本站所有資源如無特殊說明,都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等,如果需要附件,請聯系上傳者。文件的所有權益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙,網頁內容里面會有圖紙預覽,若沒有圖紙預覽就沒有圖紙。
  • 4. 未經權益所有人同意不得將文件中的內容挪作商業(yè)或盈利用途。
  • 5. 人人文庫網僅提供信息存儲空間,僅對用戶上傳內容的表現方式做保護處理,對用戶上傳分享的文檔內容本身不做任何修改或編輯,并不能對任何下載內容負責。
  • 6. 下載文件中如有侵權或不適當內容,請與我們聯系,我們立即糾正。
  • 7. 本站不保證下載資源的準確性、安全性和完整性, 同時也不承擔用戶因使用這些下載資源對自己和他人造成任何形式的傷害或損失。

評論

0/150

提交評論