水泥基復(fù)合材料彎曲性能及改性機理研究

1、Y’937862分類芍：銜緞：學(xué)校代碼學(xué)號蔫叁斜麓太警碩士研究生學(xué)位論文論文題目：水泥基復(fù)合材料彎曲性能姓名指導(dǎo)教師學(xué)科專業(yè)專業(yè)代碼研究方向及改性機理研究于辰龍李樹塵應(yīng)用化學(xué)081704材料化學(xué)2006年5月24HTHERESEARCHONBENDINGPROPEIHYANDMODIFYINGMECHANISMOFCEⅣ匝NTBASEDCOM咿0SITEABSTRACTOrganicmaterial(polyvinylalcohol(P

2、VA)，vinylversatateacrylatecopolymeremulsionetc)andinorganicmaterial(wollastonitepowderandsilicasoletc1areaddedrespectivelyasreinforcingphaseTheirreinforcingeffectiscomparedandstudiedMoldingprocessisstudiedtevealitsinflue

3、nceonflexuralstrength，elasticmodulusanddeflectionModifyingeffectandreinforcingmechanismofthesematerialsarestudiedTheresultofthosecompositeshows：1Flexuralstrengthofsamplewithoutreinforcementequals163MPa16％higherthanitscou

4、nterpartwith20MPamoldingpressureThereissignificanteffectofmoldingpressureonsizestructureanddensityofsamples舡aresultitaffectsflexuralstrengthapparently2Themaximmofsilicasol／cementcompositeis115％highertllanthatofreferences

5、ampleItsdeflectionis2timesofthatofreferencesampleAmongreinforcingmaterialwhosemaincontentisSi02，silicasolcanenhanceflexuralstrengthanddeflectionthoughlesseningtheporosityasisshowninSEMphotographsThemechanismofreinforceme

6、ntisgivenanddiscussedWollastonite／cementcompositehasflexuralstrengthtwiceashighasthatofreferencesampleThemaximumdeflectionequals025millAccordingtothemodelinthispaperfavorablecontentofreinforcingmaterialis2％47％3Thereislim

7、itedeffecttothereinforcementofpolyesterpolyurethaneThemoduluspoursasitscontentanddeflectionhikesThedeflectioncanbebetteredwithamaximumdeflection7111111FlexuralstrengthofPVA／cementcomposite(20MPamoldingpressure)is115％high