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Cellulose -based concrete preparation and application of superplasticizer


Pumping water reducer and the critical content [J]. Shenyang Institute of Architectural Engineering , 1997,15 (3 ) :251 -255 [12 ] Sun Zhenping , Chiang formal, Fan Jiandong , et al. Sulphamate Synthesis and application of high performance water reducer EJ]. Ceramic Society ,[link widoczny dla zalogowanych], 2005,33 (7) :864-870Preparationsandapplicationsofcellulose. basedconcretehigh'rangewater-reducingagentWANGLi. jiu, HUANGFeng-yuan,. , ZHANGHong '. , MAXi-chen '. (1.SchoolofCivilandHydraulicEngineering, DalianUniversityofTechnology, Dalian116024, Ohina ~ 2.CollegeofChemicalIndustryandMaterials, LiaodongUniversity, Dandong118001, Chinm3.SchoolofChemicalIndustryandMaterials, DalianPolytechnicUniversity, Dalian116034, China) Abstract: Water-solublesulfobutylatedcellulose (SBC) waspreparedbypolymermodificationmethodvia1.4-butanesultone (BS), NaOHandcellulose. ThestructureofSBCwastestifiedwithFT-IR, andSEMwasappliedtostudythesurfaceofhydratedcement. Theoptimumconditionsfortheproductwereobtained: n (NaOH). n (AGU). n (BS) a 2.5:1:1.7, andreactiontimeis4.5h, reactiontemperatureis75 ℃. Itsperformancesaswater-reducingagentforcementwerealsostudied. TheresultsshowthatthefluidityofcementpastewithappropriateamountofSBCcanbeincreasedobviously. fluiditylosWhendosageis1, thewater-reducingratioreachesashighas16.5inmortarandSisverylittlein120min, lessthan4. TheSBCpresentsalittleretardingeffectoncementintheexperiment. SEMshowsthatthestructureofthehardenedcementpastebecomesmoreuniformandcompactthanthatoftheContro1. TheresultsofapplicationofSBCinconcretealsoindicatethatSBCcanimprovethestrengthofconcrete. Thus, SBChasthepotentialtobedevelopedashigh-rangewater-reducingagent. Keywords: cellulose ~ sulfobutylatedcellulose (SBC); high-rangewater-reducingagent ~ cementpaste