国际会议作报告英语发言稿

Thankyou,prof.….Mynameis…..I’mfrom…..Iamverypleasedtobeheretojointhisforum.Thetopicofmypresentationispropertiesofrapidconstructionmaterialsforsoilpavementoffieldairfield.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.Cantabriatestandothertestsarealloriginalexperiments;theyareusedinstabilizedsoilforfirsttime,hereIwillnotdevelopmynarrative.Asregardstheinnovation,Ithinkitthroughoutthewholeresearch,includingmaterialschoosing,schememaking,mechanicalandwater-stableexperiments.Ithinkitcanbedrawledfromthefollowingkeywords,suchassoilchoosing,sand,powders,fibers,andsoon.Threemainpartscanbesummarized.First,selectingtwokindsofsoils,threekindsofpowders,severalcombinations;second,severalkindsoffibers,differentlengthandadmixture;third,comprehensiveexperiments,testmethodandtestinstrument.