国际会议作报告英语发言稿.docx

国际会议作报告英语发言稿.docx

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Thankyou, prof.…. Myname is….. I’m from….. Iam verypleasedtobeheretojointhisforum. Thetopic ofmypresentationispropertiesofrapidconstructionmaterialsforsoilpavementoffieldairfield.Asisshowninthepicture,themainpartsofmyresearchareaboutsoilpavement.

Mypresentationwillincludethesefourparts:

First,somebackgroundinformationaboutthisresearch;second,themainworkwehavedone;third,someconclusionswehavegotandthelast:

innovationandpresentationofourpublishedpapers.

WhyIchoosethisitem?

Ithinkitcanbeillustratedfromthefollowingfourparts.First,theexistingquantityofairfieldsisstillnotsufficientandtheairfieldshavemanyshortcomingsespeciallyinwartime. Second,thecomplementaryfacilities,suchashighwayrunwaysarefarlessthanairfields,however,havemoreweakness.Third,acertainamountoffieldairfieldisquitenecessaryconsideringsomeemergenciessuchasrescueanddisasterrelief.Forth,thefieldairfieldcanfillthevoidofairfieldandtheycanbecombinedtobeairfieldnetwork.

Themeaningandaimofthisresearchcontainsthreeparts.Fast,convenientandvalidity,fastmeansthefieldairfieldmustbeconstructedasfastaspossible,convenientmeanstheconstructionshouldneedtheminimumequipment,laborandmaterialsconsideringtheactualconstructioncondition,validitymeanstheconstructedairfieldisabletosupporttheoperationofgivenaircraftinspecificallytime.

Justlikemanyotherterritories,thesituationoftheresearchisthattheU.S.Armytakesadvancedline.TheU.S.Armydeclaresthattheycanreachtoanywhereontheearthin96hours,themostimportantmethodforforceprojectionisthoughaircraft,thusrapidconstructionofpavementisthekeyproblemforrapidforcetransportation.

Themainworkwehavedonecanbesummarizedasfourparts,materialschoosing,schememaking,mechanicalpropertiesresearchandwater-stablepropertiesresearch.

Wechoosetwokindsofsoils,whicharegotfromXi’an,ShanxiprovinceandJiuquan,Gansuprovinceseparately.ThesandfromBaRiverwasconsideratetoinvestigatetheinfluenceofsandtothepropertiesofstabilizedsoil.Thechosenthreekindsofpowdersarecement,limeandnew-typestabilizerdevelopedbyChang’anUniversity.Theprinciplesinconsideringthefunctionof4kingsoffibersarereferringdifferentlength,typeandmixingthem.

Onaccountofthetime,Iwillmakeabriefdescriptionabouttheexperimentscheme.Insummary,threepartswereproposedtodistinguishtheaffectingfactorsinmakingexperimentscheme.Theyarepowdercontrol,fibercontrolandotherfactors.Takingpowdercontrolforexample,thedosageofcementisrespectively6%,8%and10%whenthesoilisstabilizedonlybycement,whilethedosageofcementdecreaseto3%,5%and7%whenthelimeisaddictedtostabilizedsoil.Thefollowingtwofactorsarestabilizerandsand.

Sixkindsofexperimentswereperformedtoinvestigatetheinfluenceofabovefactorstothemechanicalpropertiesofstabilizedsoil.Theaimofcompactiontestistofindthemaximumdrydensityandoptimummoisturecontent.Theaimofcompressionstrengthtestistodeterminetheoptimumdosageofcement,lime,powderstabilizerandfiber,meanwhileevaluatingtheperformanceofstabilizedsoil.Theaimofsplittingtensionstrengthtestissimilartocompressionstrengthtest,theleftpictureissamplestabilizedbycement,whiletherightpictureisthesamplestabilizedbyfiberandcement.Thedirectsheerisanotherimportantparameteringeotechnicalengineering.Itinfluencesthefoundationbearingcapacityandmanyotherpropertiesespeciallyforsoilbaseandbasecourse.Theleftpictureshowsthecourseofmakingsampleandtherightpictureshowsthetestprocess.

TheCBRtestandreboundmodulustestarereferencedfromhighwaytestspecificationtoevaluatingthecomprehensivecapacitiesofeachstructurelevelofthepavement.Forboththetwotests,theleftpictureshowsthecourseofmakingsampleandtherightpictureshowsthetestprocess.Whatshouldbenotedisthatthenumberofsampleisatleast6,thelastresultistheaveragevalueofthesedategotfromtestaftereliminatingthebadresults.

Fourkindsofexperimentswereperformedtoinvestigatetheinfluenceofabovefactorstothewater-stablepropertiesofstabilizedsoil.Thescouringtestisnotthestatedexperimentincurrentspecification.Itisperformedbyusthroughlookinguplargequantityofinterrelatedliterature,andtwodifferentwaystocarryout.Theleftpictureshowsthemethodofvibrationtableandtherightpictureshowsthemethodoffatiguetestinstrument.Penetranttestreferstotheexperimentinrelatingconcretespecification.Theleftpictureshowstheprocessofsaturation,therightpictureshowsthetestprocess.