粉煤灰和矿粉对磷酸镁水泥性能的影响李国新

352Vol．35No．220162BULLETINOFTHECHINESECEＲAMICSOCIETYFebruary2016710055magnesiumphosphatecementMPC。MgO、、。MPC10%MPCMPCMPCXＲD、、MPCMgNH4PO4·6H2OMPC28dMgNH4PO4·6H2O。TU525A1001-1625201602-0352-06InfluenceofFlyAshandSlagonthePropertiesofMagnesiumPhosphateCementLIGuo-xinTONGWan-liangZHANGGeWUYanSHILingHUANGＲu-jieXi’anUniversityofArchitecture＆TechnologyXi’an710055ChinaAbstractMagnesiumphosphatecementMPCisanewtypeofgashardeningcementitiousmaterialaddingmineraladmixturecanimproveitsperformance．InthispaperMPCwaspreparedwithhighpuritydeadburnedmagnesiumoxideammoniumdi-hydrogenphosphateboraxandacertainamountofflyashorslag．TheinfluencesofflyashandslagonthesettingtimemechanicalpropertyandwaterresistanceofMPCwerestudied．TheresultsdemonstratethatwiththeincreaseofflyashandslagcontentthesettingtimeofMPCpastesshortenedthecompressivestrengthofmortarspresentedthetrendofincreasingfirstlyandthendecreasing．Whenthecontentisupto10%thecompressivestrengthisthehighest．ThesamecontentofslagcontributedtotheearlyandlatestrengthofMPCwasbetterthanflyash．FlyashimprovedthewaterresistanceofMPCbuttheslagdecreasedthewaterresistanceofMPC．TheresultsofXＲDdemonstratethatthemainproductofMPCpastewithnomineraladmixtureorwithflyashandslagisMgNH4PO4·6H2OandsomeamorphousphasethesampleofMPCwithslagimmersedinwaterfor28dthemainingredientsofthesurfaceleachingsubstancesisMgNH4PO4·6H2O．Keywordsmagnesia-phosphatecementflyashslagsettingtimeproperty2013JK09751975-．．1MPC、、DOI:10.16552/j.cnki.issn1001-1625.2016.02.003235312。MPC3-5、。MPC、、6-8。MPC、、。MPC。9、10。11、。12。。、。。22．11MgO99．0%1500℃6h250m2/kg。2NH4H2PO499．0%。3Na2B4O7·4H2O99．5%。4FAI。5SGS95。6S。7。2．21《、、》GB/T1346-20010．18MPC。。30s15s。MPC、。2《》GB/17671-199920mm×20mm×20mm20±2℃50%1h1h、8h、1d、7d、28d。3X0．18MPC1∶140℃M1MISTＲALX-。2．310%、20%、30%、40%、50%M∶P4∶13．0%1∶10．200．18。10%、20%、30%、40%、50%M∶P3∶1、2．29∶1、1．75∶1、1．33∶1、1∶13．0%、6．0%、9．0%、12%15%1∶10．200．18。CaOCa2+B4O2－7CaO1314。NH4H2PO4。3543533．1MPC1、MPC。1MPC。B4O2－7MgOB4O2－7Mg2+MgONH+4H2PO－4MgO15。MPC。MPCCaOCa2+B4O2－7CaO。1、Tab．1InfluencesofflyashandslagonthesettingtimeofMPCpastes0%10%20%30%40%50%8＇7＇306＇305＇305＇155＇8＇7＇6＇156＇5＇4＇3．2MPC1MPC。1。、MPC。、10%。1ab。1abMPCFig．1InfluencesofflyashaslagbonthecompressivestrengthofMPCmortars3．3MPC2ab、、MPCXＲD。2、、MPCMgO、MgNH4PO4·H2OMgNH4PO4·6H2O。MgNH4PO4·H2OMgNH4PO4·6H2O。。1h7d10%、MgNH4PO4·H2OMgNH4PO4·6H2O。。23551h10%、F10-1h、S10-1h、F0-1h、S0-1hMgNH4PO4·H2OMgNH4PO4·6H2O、MPC。1h10%、1hMPC。7d30%、F30-7d、S30-7d10%F10-7d、S10-7dMgNH4PO4·H2OMgNH4PO4·6H2O、MPC。、MPC、、。2ab、MgNH4PO4·H2OMgNH4PO4·6H2OMPCMgNH4PO4·H2O、MgNH4PO4·6H2O。MPC。2abMPCXＲDFig．2XＲDpatternsofMPCpasteswithdifferentdosageofaflyashbslag3．4MPC。MPC。。。Wn=Ｒcn/ＲcWnndＲcnndＲc28d。2MPC。228d0．62。28d。10%20%28d0．930．86。MPC。2MPCTab．2StrengthandstrengthretentioncoefficientoftheMPCmortarswithvariousflyashcontentsFAcontent0%10%20%30%40%50%Ｒc/MPa53．8457．6644．1531．2126．7517．59Ｒc28/MPa33．3853．6237．9722．7817．8511．43W280．620．930．860．730．670．653MPC。328d。0．623563510%、20%、30%、40%50%0．61、0．66、0．59、0．600．59MPC。3MPCTab．3StrengthandstrengthretentioncoefficientoftheMPCmortarswithvariousslagcontentsSGcontent0%10%20%30%40%50%Ｒc/MPa53．8470．9340．7934．2930．6129．44Ｒc28/MPa33．3843．0026．7820．5018．3017．43W280．620．610．660．590．600．593．5328dMPC。3MPC28d。4MPC28dX。4MgNH4PO4·6H2OMgNH4PO4·H2O。。328dMPCFig．3SamplesofMPCmortarswithslagimmersedinwaterfor28d4MPC28dXＲDFig．4XＲDpatternofsurfaceleachingsubstancesfromthesampleofMPCwithslagimmersedinwaterfor28dMPC。MPC51MPC2。MPC1MPC2CaO143Mg2+、NH+4、PO3-44。MPCKH2PO4NH4H2PO4MPC。。4110%23MPCMPC。23571．MPBJ．20012196-198．2DuLYanYHuZH．ＲesearchandapplicationstatusofchemicallybondedmagnesiumphosphatebindingmaterialsJ．Cement2007523-25．3．D．2007．4．D．2004．5LiYChenB．FactorsthataffectthepropertiesofmagnesiumphosphatecementJ．ConstructionandBuildingMaterials201347977-983．6LiJSZWBCY．LaboratoryevaluationofmagnesiumphosphatecementpasteandmortarforrapidrepairofcementconcretepavementJ．ConstructionandBuildingMaterials201458122-128．7YangQBZhangSQWuXL．Deicer-scalingresistanceofphosphatecement-basedbinderforrapidrepairofconcreteJ．CementandConcreteＲesearch200232165-168．8HallDAStevensＲ．Effectofwatercontentonthestructureandmechanicalpropertiesofmagnesia-phosphatecementmortarJ．JournalofAmericanCeramicsSociety19988161550-1556．9．J．20051241-43．10．J．2005638-40．11．J．2010136716-720．12．J．20115470-473．13．J．20114721-726．14．M．19838188-117．15．D．櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒櫒2006．035119LiJ．EffectsofFeIIIonfloccharacteristicsofactivatedsludgeJ．JournalofChemicalTechnologyandBiotechnologyBiotechnology200580313-319．20ParkPKLeeCHLeeS．PermeabilityofcollapsedcakesformedbydepositionoffractalaggregatesuponmembranefiltrationJ．EnvironmentalScienceandTechnology20064082699-2705．21．、J．20063772-75．22ChoBDFaneAG．Foulingtransientsinnominallysub-criticalfluxoperationofamembranebioreactorJ．JournalofMembraneScience2002209391-403．23．MBＲJ．20133341-5．