聚丙烯纖維和聚合物干粉改性水泥砂漿的性能研究.pdf

1、同濟(jì)大學(xué)博士后學(xué)位論文聚丙烯纖維和聚合物干粉改性水泥砂漿的性能研究姓名：劉麗芳申請學(xué)位級別：博士后專業(yè)：材料學(xué)指導(dǎo)教師：王培銘20050112A№In叭AbstractConcreteblockiSakindofnewwallmatcrialinsteadofclaybrickwhichcanavoidthedecreaseofarablelandeveryyearSOitisdefinitelystipulatedtoapplyand

2、developin“theTenthFive—YearPlait’’establishedbyMinistryofConstruction，Howeverordinaryplasteringmortarcouldn’tpreventthewallbuiltbyconcreteblockfromcrackingandseepage，forconcreteblockhavegreaterdifferenceinshrinkageratio，

3、Inordertesolvethisproblem，fiberandpolymerpowderaremixerintocementmortartoimproveitsanti—crackingandwaterproofpropertieshereBasedontheresearchinthispapertheapplicationofconcreteblockaswallmaterialcanbeextended，SOcanmakeco

4、ntributionforourcontinuabledevelopmentInthispaperblendingratioofplasteringmortarisstudied，andsomeparametersuchaswater／cementratio，cement／sandratioandamountoffly—ash，areselectedTheeffectofstirringmethodsondistribulionoffi

5、berinmortarissystemicallydiscussedandsogetsthebeststirringmethodforfiber—reinforcedmortarTheeffectsoffiberkinds，parametersofpolypropylenefiberandhydroxyethylmethylcelluloseoncementmortarproperties，suchasmechanicalpropert

6、ies，anti—crackingpropertiesdry—shrinkageratiowaterproofpropertyandSOon，areemphaticallyanalyzedFurthermore，themechanismsofpolypropylenefiberandhydroxyethylmethylcellulosereinforcedcementmortarareinvestigated，tooTheresearc

7、hesinthispapershowthat，cementmortarwithC／Sof1：3，W／Cof063，andfly—ashamountof10％havethebestexcellentpropertiesThestudyaboutstirringprocessshowthat，putsand，cementandfly—ashtogetherintoagitatorfirstandstarttostirthenpotfiber

8、inlOsandstirtogetherwithothercomponents確【20s，finallyputwaterinlosandthenstirtill3min，stirringusingthismethodcanguaranteetheuniformityoffiberincementmortarTheresearchesintiffspaperShowthat，themixoffiberintocementmortarcan