納米硅粉生態(tài)纖維混凝土抗碳化性能研究.pdf

1、獨(dú)創(chuàng)性聲明本人聲明所呈交的論文是我個(gè)人在導(dǎo)師指導(dǎo)下進(jìn)行的研究工作及取得的研究成果。盡我所知，除了文中特別加以標(biāo)注和致謝的地方外，論文中不包含其他人已經(jīng)發(fā)表或撰寫過的研究成果，也不包含為獲得寧夏大學(xué)或其它教育機(jī)構(gòu)的學(xué)位或證書而使用過的材料。與我一同工作的同志對(duì)本研究所做的任何貢獻(xiàn)均已在論文中作了明確的說明并表示了謝意。研究生簽名：時(shí)間：年月R關(guān)于論文使用授權(quán)的說明本人完全了解寧夏大學(xué)有關(guān)保留、使用學(xué)位論文的規(guī)定，即：學(xué)校有權(quán)保留送交論文的

2、復(fù)印件和磁盤，允許論文被查閱和借閱，可以采用影印、縮印或掃描等復(fù)制手段保存、匯編學(xué)位論文。同意寧夏大學(xué)可以用不同方式在不同媒體上發(fā)表、傳播學(xué)位論文的全部或部分內(nèi)容。(保密的學(xué)位論文在解密后應(yīng)遵守此協(xié)議)研究生簽名：導(dǎo)師虢喜V立呀時(shí)間：年月F1時(shí)間：年月AbstractInrecentvears。ithasbecameamoreandmoreseriousproblemthatconcreteconstructionsgettingdam

3、agedorevendestroyedbyforestandcarbonerosionSocarryingonconcreteforestandcarbonatlonresistanceresea甜lhasimportantpracticalsignificanceforimprovingdurabilityofconcreteSincetraditionalconcreteitselfhassomeinevitableweakness

4、，suchaslowerstrength，higherbrittleness，baddurabilitywasteenergyresourceandSOon，whichhascouldn’tadapttotheneedotmod鋤cons扛uctionInordertomeettheneedsoffinemechanicalpropertyanddurability，savingresourcesandenvironmentfriend

5、lythegreenhighperformanceconcretehasemergedasthetimes‘equl‘eThispaperbasedonthisstartingpoint，takesnanosiliconpowderandflyashasmineraladITllxtllretosubstitutecementequivalentlyandmixeswithcompoundecologicalfibertogethert

6、oimprovetheDe怕徹anceofhighperformanceconcreteUsingmacroscopictestcombined、)Irlmmlcmscoplcanalvsiswhichincludesorthogonaltest，thefreeze—thawcycletest，carbonizationtest，mlcroscoplctestandcontrasttestStudyinghownanosiliconpo

7、wderandcompoundecologicalfiberinfluencethemechanicalpropertyandforestandcarbonationresistanceofconcrete，thenanalysisingthesuperpositioneffectandoptimizationmechanismtoprovidereferenceforpracticalen91nee徹gapplicationThema

8、inresearchresultsarelistedasfollows：1Obtaintheoptimalmixproportionofnanosiliconpowdercompoundecologicalfiberconcretethroughorthogonalexperiment：thewaterbinderratiois030，theoptimizedSPis46％，thedosageofnanosiliconpowder，ny

9、ashandcompoundecologicalfiberare2％，20％and09kg／m’respectively2111eresultsof28daysofconcretemechanicsperformancetestsshowthatthenanosiliconpowdersingledopedgroup(Si)concretehasthehighestcompressivestrength，theten810nandcom

10、pressionratioofmixinggroup(Y)issignificantlyhigherthanothergroupsand20％higherthanthereferencegroup，whichprovesitcanpreventcracksandincreaseintoughnessofconcretesignificantlybyputtingmineralfineadmixturesandcompoundecolog

11、icalfibermtoconcrete3Therangeanalysisoforthogonaltest’sdatashowsthattheinfluencingsignificantsizeorderotfivefactorsincludeswaterbinderratio(A)、flyash(B)、nanosiliconpowder(C)、SP(D)andecologicalfiber(E)forthecompressivestr

12、engthof28days’concreteisACDBE；forsplittingtensilestrengthof28daysconcreteisACEBD；fortensionandcompressionratioof28days’concreteIS：CAEDB4ARer100timesoffreezethawcycle，thenanosiliconpowdersingledopedgroup(Si)concretehasthe

13、bestforestresistance，butthemixinggroup(Y)haslittleeffectonimprovingtheforestresistanceofconcrete，inaddition，thecompoundecologicalfibersingledopedshowsgoodantistnpperformance5ACCOrdingtoresultsofthe42daysrapidcarbonationt

14、est，thecarbonationdepthotmixinggroup(Y)isthesmallestamongallgroups，thesecondisthenanosiliconpowdersingledopedgroup(Si)，thecarbonationdepthofbothdecrease356％and327％separatelycomparedwithreference鏟oupthatDresentsgoodcarbon

15、ationresistanceInaddition，thecompoundecologicalfibermixedalonehasnothingeffectonimprovingthecarbonationresistanceofconcrete6Thetestofconcretecarbonationshowsthatthedepthofcarbonationincreaseswiththeextensionofcarbonizati