土木工程英语Unit 2 Lecture 1.pptx

Unit2

CivilEngineeringMaterialsPartIPre-reading

1.InnovationsincivilengineeringCanyougivesomeexamplesofincredibleinnovationsinthecivilengineeringfieldinrecentyears?Self-repairingbridge3Dprintedconcretehouse

Self-repairbridge

3Dprinthouse

2.Whatchangestookplaceinmaterials?Inthepast:rawmaterials—availability,lowcost,butshortendurance

2.Whatchangestookplaceinmaterials?Inthepresent:advancedmaterials—resultofhightechnology,maybeofhighcost,butwithlongendurancegreatfunctionsBioconcrete(Self-healingconcrete)

2.Whatchangestookplaceinmaterials?Steelfiberreinforcedconcrete

2.Whatchangestookplaceinmaterials?

Foamedconcrete

2.Whatchangestookplaceinmaterials?Transparentconcrete

3.GreenbuildingmaterialsHowmuchdoyouknowaboutit?Youmaythink…Itisnew?Itisclean?Itiseco-friendly?Itisrecyclable?

3.GreenbuildingmaterialsYes,youareallright!But,letmeremindyou…Thesepicturesbelowarecloselyrelated,too.

3.GreenbuildingmaterialsBecause,greenmaterialsarealwaysrelatedtorecyclableresources.Thismeanssomeareproducedoutofdiscardedmaterials.And,thisleadstothefirstfeatureofgreenmaterial—recyclability.1

3.GreenbuildingmaterialsSecondly,greenmaterialsshouldbringlittlepollutiontothenaturalenvironment,duringitsproductionandafter-use.Thirdly,theyareintendedtoimprovepeople’shealthandlivingquality.23

3.GreenbuildingmaterialsSo,wemaygetironandsteelmaterials,plasticmaterials,rubbermaterials,woodmaterials,stoneandbrick