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透水
水泥
混凝土
力学性能
中文
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透水水泥混凝土的力学性能【中文5430字】,透水,水泥,混凝土,力学性能,中文
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JCENTSOUTHUNIV201211933293334DOI101007SL177101214L19MECHANICALPROPERTIESOFPERVIOUSCEMENTCONCRETECHENY_U陈瑜，WANGKEJIN王科进，LIANGDI梁地垒SPRINGER1SCHOOLOFTRAFFICANDTRANSPORTATIONENGINEERING，CHANGSHAUNIVERSITYOFSCIENCEANDTECHNOLOGY,CHANGSHA410004，CHINA；2DEPARTMENTOFCIVIL，CONSTRUCTIONANDENVIRONMENTALENGINEERING，IOWASTATEUNIVERSITY，AMES，IA50010，USACENTRALSOUTHUNIVERSITYPRESSANDSPRINGERVERLAGBERLINHEIDELBERG2012ABSTRACTCOMPRESSIVEANDFLEXURAISTRENGTHFRACTUREENERGY,ASWELLASFATIGUEPROPERTYOFPERVIOUSCEMENTCONCRETEWITHEITHERSUPPLEMENTARYCEMENTITIOUSMATERIALSSCMSORPOLYMERINTENSIFIED，WEREANALYZEDTESTRESULTSSHOWTHATTHESTRENGTHDEVELOPMENTOFSCMMODIFIEDPERVIOUSCONCRETEFSPCDIFFERSFROMTHATOFPOLYMERINTENSIFIEDPERVIOUSCONCRETEPPCANDPOROSITYHAS1ITTLEEFFECTONTHEIRSTRENGTHGROWTHPPCHASHIGHERFLEXURALSENGTHANDREMARKABLYHIGHERFLEXNRA1TOCOMPRESSIVESFFENGTHRATIOTHANSPCATTHESAMEPOROSITYLEVE1RESULTSFROMFRACTURETESTOFPERVIOUSCONCRETEMIXESWITHPOROSITYAROUND195SHOWTHATTHEFRACTUREENERGYINCREASESWITHINCREASINGTHEDOSAGEOFPOLYMER,REFLECTINGTHEDUCTILEDAMAGEFEATURESRATHERTHANBRITTLENESSPPCDISPLAYSFARLONGERFATIGUELIFETHANSPCFORANYGIVENFAILUREPROBABILITYANDATANYSFFESSLEVE1ITISPROVEDTHATTWOPARAMETERWEIBULLPROBABILITYFUNCTIONDESCRIBESTHEFLEXURALFATIGUEOFPERVIOUSCONCRETEKEYWORDSPERVIOUSCONCRETE；STRENGTH；FRACTURE；FATIGUELIFE1INTRODUCTIONPERVIOUSCEMENTCONCRETEWASACONCRETEWITHCONTINUOUSVOIDSTHATWEREINTENTIONALLYINCORPORATEDINTOCONCRETEBYBLENDINGWITHNOORVERYLITTLEAMOUNTOFFINEAGGREGATESCEMENTITIOUSMATERIALSWERENOTENOUGHTOFILLTHEVOIDSAMONGCOARSEAGGREGATESWITHSPECIALPARTICLESIZEDISTRIBUTIONTOMAKEINTERCONNECTEDMACROPORES卜2THERANGEOFPOROSITYTHATWASCOMMONLYREPORTEDFORPERVIOUSCONCRETEUTILIZEDINPAVEMENT，WASABOUT15一2534THESIGNIFICANTLYREDUCEDSTRENGTHOFCONVENTIONALPERVIOUSCONCRETEDUETOHIGHPOROSITY,NOTONLYLIMITEDITSAPPLICATIONINHEAVYTRAFFICROADSBUTALSOINFLUENCEDTHESTABILITYANDDURABILITYOFTHESTRUCTURES，BECAUSEOF,FOREXAMPLE，SUSCEPTIBILITYTOFROSTDAMAGEANDLOWRESISTANCETOCHEMICALSHOWEVER,BYUSINGAPPROPRIATELYSELECTEDAGGREGATES，SILICAFTLMESFORORGANICINTENSIFIERS，ANDBYADJUSTINGCONCRETEMIXINGPROPORTION，THEMECHANICALPROPERTIESOFPERVIOUSCONCRETECOULDBEIMPROVEDGREATLY56YANGANDJIANG7SHOWEDTHATTHEUSEOFSFANDSUPERPLASTICIZERSPINPERVIOUSCONCRETECOULDOBVIOUSLYENHANCEITSSTRENGTHTHERESULTSALSOINDICATEDTHATSFHADABETTEREFFECTFORIMPROVINGTHEPROPERTIESOFPERVIOUSCONCRETETHANPOLYMERWHENUSINGWITHSP；ANDITCOULDOBTAINCOMPRESSIVESTRENGTHOF50MPAANDFLEXURAISTRENGTHOF6MPAKEVERN81PRESENTEDTHATTHEADDITIONOFPOLYMERSTYRENEBUTADIENERUBBERINPERVIOUSCONCRETEIMPROVEDITSWORKABILITY,STRENGTH，PERMEABILITYANDFREEZETHAWRESISTANCE，RESULTINGINHIGHERSTRENGTHATRELATIVELYLOWERCEMENTCONTENTSANDHIGHERPOROSITYFUNDAMENTALINFORMATIONINCLUDINGTHEEFFECTSOFPOROSITY,WATERTOCEMENTRATIO，CEMENTPASTECHARACTERISTIC，VOLUMEFRACTIONOFCOARSEAGGREGATES，SIZEOFCOARSEAGGREGATESONPERVIOUSCONCRETESTRENGTH，HADBEENSTUDIEDF3，9121HOWEVER,FORTHEREASONTHATTHEPOROSITYPLAYEDAKEYROLEINTHEFUNCTIONALANDSTRUCTURALPERFORMANCESOFPERVIOUSCONCRETES1314，THEREWASSTILLANEEDTOUNDERSTANDMOREABOUTTHEMECHANICALRESPONSESOFPERVIOUSCONCRETESPROPORTIONEDFORDESIREDLEVELSOFPOROSITIESALTHOUGHITWASPOSSIBLETOHAVEWIDELYDIFFERENTPORESTRUCTUREFEATURESFORAGIVENPOROSITY,ORSIMILARPORESTRUCTUREFEATURESFORVARIEDPOROSITIESINPERVIOUSCONCRETE，ITWASIMPERATIVETOFOCUSONTHEMECHANICALRESPONSESOFPERVIOUSCONCRETEATDIFFERENTDESIGNEDPOROSITIESHOWEVER,COMPAREDWITHTHERELATEDRESEARCHONCONVENTIONALCONCRETEVERYLIMITEDSTUDYHADBEENCONDUCTEDONTHEFRACTUREANDFATIGUEBEHAVIORSOFPERVIOUSCONCRETE，WHICHWEREESPECIALLYIMPORTANTFORPAVEMENTCONCRETESUBJECTEDTOHEAVYTRAFFICANDTOSEVERESEASONALTEMPERATURECHANGEFOUNDATIONITEMPR0JECTKQO80205SUPPORTEDBYKEYLABORATORYOFROADSTRUCTUREANDMATERIALOFMINISTRYOFTRANSPORTCHANGSHA，CHINARECEIVEDDATE20111025；ACCEPTEDDATE20120222C0RRESP0NDINGAUTHORCHENYU，ASSOCIATEPROFESSOR，PHD；TEL8673185779355；EMAILJUST4UJUST43163CORN3330JCENTSOUTHUNIV20121933293334THEPRESENTEDWORKOUTLINEDTHERAWMATERIALSANDMIXINGPROPORTIONSTOPRODUCEHIGHSTRENGTHSUPPLEMENTARYCEMENTITIOUSMATERIALSCM、MODIFIEDPERVIOUSCONCRETESPCANDPOLYMERINTENSIFIEDPERVIOUSCONCRETEPPCATDIFFERENTPOROSITIESWITHINTHERANGEOF1525THENTHEMECHANICALPROPERTIESOFPERVIOUSCONCRETE，INCLUDINGTHECOMPRESSIVEANDFLEXURALSTRENGTHS，FRACTUREENERGY,ASWELLASFATIGUEPROPERTY,WERE1NVESTIGATEDINDETAILS2EXPERIMENTPROGRAM21RAWMATERIALSANDMIXINGPROPORTIONSTYPEIORDINARYPORTLANDCEMENTOPC，WITHTHEDETAILSIN11ABLE1、ANDGRANITEAGGREGATESWEREUSEDFORALLPERVIOUSCONCRETEMIXTURESTHECOMBINEDAGGREGATES，475MILLAND95MMPARTICLESWERECHOSENTOPREPARETHEMIXTURESTOCASTSPC，FLYASHTYPEC，FA，SFANDSPWEREUSED；WHILESJ601THEMIXTUREOFVINYLACETATEETHYLENECOPOLYMERVAEANDACRYLICEMULSION，WASADDEDTOPRODUCEPPC1AB1E21ISTSTHEMAINPROPERTIESOFSJ601TWOSERIESOFTESTINGSPECIMENSWERECASTINACCORDANCEWITHTHEDESIGNATEDMIXINGPROPORTIONSPRESENTEDIN11AB1E3INWHICHINDICATESTHEMASSRATIOOFAGGREGATEIN1MCONCRETETOTHELOOSEDENSITYAFTERBEINGDENSELYVIBRATEDTHEPERCENTAGESOFFAANDSFWERETHEREPLACEMENTSOFTHESAMEMASSOF0PC；WHILETHOSEOFSPANDSJ601WERETHEADDITIONALDOSAGESITSHOULDBECLARIFIEDTHATTOOMUCHPOLYMERBLOCKEDTHEVALIDPORESANDBADLYINFLUENCEDTHEPERMEABILITYOFPERVIOUSCONCRETESJ一601DOSAGEMORETHAN12WASNOTRECOMMENDED1，622TESTMETHODSTHESTRENGTHTESTSWERECARRIEDOUTACCORDINGTOGTB500812002STANDARDFORTESTMETHODOFMECHANICALPROPERTIESINORDINARYCONCRETETABLE1PROBERTIESOF0PCSTRAINGAUGESWERESTICKATTHEMID。POINTONTHEBOTTOMSURFACEOFBEAMSPECIMENFL50MMX150MM550MMWHICHSUSTAINEDTWOTHIRDSSYMMETRICA11OADINGETHECORRESPONDINGSTRAINWASMEASUREDBY，_YDIGITA1RECORDERWASTHENTRANSLATEDINTOVWHICHMEANTTHEMIDSPANDEFLECTIONOFBEAMSPECIMENINACCORDANCEWITHEQFL1SO，THEENVELOPEDAREABY卜CURVEANDXAXISWASDEFINEDASFRACTUREENERGYOFCONCRETE，WHICHCOULDBECALCULATEDBYEQ215一L6V3L24A12JFDV12WHEREVISTHEDYNAMICDEFLECTIONOFTHEMIDSPANBEAM；LANDHARETHESPANANDHEIGHTOFBEAMSPECIMENRESPECTIVELYISTHESTRAINVALUEMEASUREDATTHEMIDPOINTOFBEAMBOTTOMWHILEAREFERSTOTHEHORIZONTALDISTANCEFROMTHELOADINGPOINTTOTHESUPPORTABUTMENTSMTS810TESTSTARANELECTROHYDRAULICSERVOTYPEMATERIALTESTINGMACHINE，WASSERVEDTOMEASURETHEFLEXURALFATIGUELIFEOFPERVIOUSCONCRETETHREESTRESSLEVELSOFSINEWAVE1OADINGF090080AND0701WITH01OFCYCLINGEIGENVALUE，10HZOFFREQUENCYANDZEROTIMEGAP，WEREADOPTEDTHENUMBEROFTHECYCLICLOADTHATTHETESTEDSPECIMENSWERESUBJECTEDUNTILFAILUREWASRECORDED3RESULTSANDDISCUSSION31STRENGTHTHECOMPRESSIVESTRENGTHSOFAL1MIXESAREEXPRESSEDASAPERCENTAGEOFTHEIR28DSTRENGTHANDSHOWNINFIG1NOEVIDENTEFFECTOFPOROSITYONTHESTRENGTHDEVELOPMENTFORBOTHSPCANDPPCISOBSERVEDTHATIS，PERVIOUSCONCRETESATDIFFERENTPOROSITIESFOLLOWTHESAMESTRENGTHGROWTHPROCESSTHESTRENGTHDEVELOPMENTOFSPCISOBVIOUSLYRAPIDATEARLYAGESWITHMORETHAN50AT3DAND80AT7DWHILETHEFURTHERTABLE2PROOERTIESOFSJ一601TABLE3MIXINPROPORTIONSOFOERVIOUSCONCRETEJCENTSOUTHUNIV201219332933343331AGEDAGEDFIG1STRENGTHDEVELOPMENTOFPERVIOUSCONCRETEASPC；BPPCTABLE4RESULTSOFSTRENGTHTESTINCREMENTSAREONLY56AT56DAND89AT90DONAVERAGE，RESPECTIVELYFIG1AIMMEDIATELYAFTERCEMENTPASTEISHARDENED，WHICHISACCELERATEDBVSFANDSP,AGGREGATESAREWRAPPEDANDCEMENTEDTOGETHERTOFORMTHESKELETONPORESTRUCTURE，OBTAININGQUITESTRONGABILITYTORESISTDESTRUCTIVELOADHOWEVER，DUETOMUCHLARGERQUANTLTYOTAGGREGATESINPERVMUSCONCRETECOMPAREDTOTHATINCONVENTIONA1CONCRETEITISREASONABLETHATTHEREISNOREMARKABLESTRENGTHINCREASINGATLATERAGESFIGURELBSHOWSTHATTHECOMPRESSIVESTRENGTHOFPPCISSHORTOF50AT7DANDREACHESONLYABOUT70AT14D，WHICHQUITELAGSBEHINDTHESTRENGTHDEVELOPMENTOFSPCCEMENTHYDRATIONANDPOLYMERFILMFORMINGPROCESSTAKEPLACEATTHESAMETIMEITISTIMECONSUMINGF0RCEMENTHYDRATIONPRODUCTSANDORGANICFILMSTOINTERTWINE，TOINTERPENETRATEANDTOBUILDUPTHENETWORKSTRUCTUREOFPASTE，FIRMLYWRAPPINGANDBINDINGAGGREGATEPARTICLESTOGETHERTHEREFORE，PPCOBTAINSACCELERATEDSTRENGTHIMPROVINGATLATERAGES，IEUPTOL17AT90DONAVERAGEITISWORTHNOTINGTHATBECAUSETHEREISACONTRADICTIONBETWEENCEMENTHYDRATIONANDSJ一601POLYMERIZATIONITISBENEFICIALFORPPCTOBEWETCUREDAT1EAST3DTOENSURECONTINUOUSHYDRATIONOFCEMENT，ANDTHENTOBESTOREDATADRYENVIRONMENTWITHRELATIVEHUMIDITY1ESSTHAN70FORBETTERFORMINGOFPOLYMERSEENFROMTABLE4PPCHASHIGHER28DFLEXURALSTRENGTHSANDREMARKABLYHIGHERFLEXURALTOCOMPRESSIVE曩0。IIL0_LL0IIU10CLIIL。S3332JCENTSOUTHUNIV201211933293334STRENGTHRATIOSTHANSPCATTHESAMEPOROSITY1EVE1SJ一601INTENSIFIESPERVIOUSCONCRETEBYFORMINGSTRONGLYCOHESIVEFILMATTHEINTERFACIALTRANSITIONZONEITZBETWEENAGGREGATESANDHARDENEDPASTE，ANDBYFILLINGTHEMICROPORESWITHINCONCRETEITMAKESPREVIOUSCONCRETELESSBRITTLEANDHAVESTRONGERRESISTANCETOFLEXURALDAMAGEFIGURE2REPRESENTSTHATTHEFLEXURALTOCOMPRESSIVESTRENGTHRATIOSDECREASEWITHTHEINCREASEOFPOROSIWHICHMAYBEATTRIBUTEDTOTHEFACTTHATTHEFLEXURALSTRENGTHOFPERVIOUSCONCRETEISMORESENSITIVETOPOROSITYTHANCOMPRESSIVESTRENGTHOPOROSITYFIG2FLEXURALTOCOMPRESSIVESTRENGTHRATIOOFPERVIOUSCONCRETE32FRACTUREENERGYTHEMIXESWITHSIMILARPOROSITYIEAROUND1951PPC3PPC4ANDSPC6WERECHOSENTOTESTTHEFRACTUREPROPERTIES8AND10OFSJ601WEREADDEDINTOPPC3ANDPPC4RESPECTIVELY,WHILESPC6HADNOPOLYMERADDITIONTHERESULTSARESHOWNINFIG3DEFLECTONMMFIG3LOADDEFLECTIONCURVESOFPERVIOUSCONCRETEWITHDIFFERENTDOSAGESOFSJ一601ATTHEBEGINNINGOFLOADING，THECURVEISAPPROXIMATELYASTRAIGHTLINE，WHICHEXPLAINSTHATBOTHSPCANDPPCSHOWGOODELASTICITYUNDERLOWSTRESSESWHENTHELOADISUPTOSOMEEXTENTIE173KNFORSPC6，THESTRAIGHTLINEINFIG3BECOMESNONLINEARATTHEPOINTOF942OFTHEMAXIMUMLOADANDTHECLRVESEGMENTISQUITESHORT，ILLUSTRATINGTHATTHEDAMAGEMAINLYBELONGSTOBRITTLEFRACTUREINCONTRAST，THESTARTINGPOINTSONTHENONLINEARSECTIONAREAT879FORPPC3AND825FORPPC4OFTHECORRESPONDINGMAXIMUM1PADWITHMOREANDMOREAPPARENTDEFLECTIONTHEREFORE，THECONCLUSIONCANBEDRAWNTHATWITHTHEINCREASEOFPOLYMERDOSAGE，PERVIOUSCONCRETEREFECTSSOMECHARACTERISTICSOFPLASTICFLOWANDGOODTOUGHNESSRESULTSOFFRACTURETESTAREALSOGIVENIN1ABLE5ITISDEMONSTRATEDTHATTHEFRACTUREENERGYSIGNIFICANTLYINCREASESWITHTHEINCREASEOFPOLYMERDOSAGETHEFRACTUREENERGIESOFPPC3ANDPPC4AREIMPROVEDBY44AND73INDIVIDUALLYCOMPAREDTOTHATOFSPC6SOCOMPAREDTOSPC，PPCHASMUCHMOREEXCELLENTRESISTANCETOCRACKINGANDCRACKPROPAGATION，ANDNEEDSMOREFRACTUREENERGYTOBETOTALLYDESTROYEDITISPROVEDMATPOLYMERMATERIALSINPERVIOUSCONCRETEINTENSIFVCEMENTPASTEANDMODIFYITZ，LEADINGTOTHECHANGEOFFAILUREMODE，ASSHOWNINFIG4FORPPCTHEFRACTUREPASSESTHOUGHTHECOREOFAGGREGATEPARTICLES，PROVINGTHATNEITHERTHEPORENORTHEITZISTHEWEAKESTPARTWITBINPERVIOUSCON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