第16卷第1期建筑材料学报V01.16,No.12013年2月J()URNALOFBUILDINGMATERIALSFeb.,2013文章编号:1007—9629(2013)01010605减水剂与乳液复掺对水泥浆zeta电位的影响钟世云1,李晋梅1’2,韩冬冬1,倪坤1’(1.同济大学先进土木工程材料教育部重点实验室,上海201804;2.中国中材国际工程股份有限公司中材研究院,北京100102;3.中国建筑股份有限公司技术中心,北京101300)摘要:采用萘系减水剂(NF)、聚羧酸系减水剂(PC),研究了减水剂与乳液不同复掺方式对水泥浆zeta(r)电位的影响.结果表明:随Pc掺量不同,Pc与乳液同掺水泥浆}电位或正或负;NF与乳液同掺水泥浆r电位介于单掺NF水泥浆与单掺乳液水泥浆善电位之间.NF滴加后,掺乳液水泥浆平衡r电位绝对值低于单掺NF水泥浆、单掺乳液水泥浆及NF与乳液同掺水泥浆平衡善电位绝对值;随PC的滴加,掺乳液水泥浆r电位值可以降至与单掺乳液水泥浆平衡}电位值接近.随乳液滴加量的增大,掺1.o%(质量分数)PC水泥浆的r电位几乎没有变化,掺o.1%PC水泥浆的善电位最初急剧降低,而后几乎不变;掺NF水泥浆f电位随乳液的滴入由一10mV迅速升高至一6mV,而后随乳液滴加量的增大,r电位仅略微升高.减水剂(NF或PC)与乳液同掺或者乳液后掺,均可降低水泥粒子对聚合物颗粒的吸附量.关键词:减水剂;乳液;复掺方式;f电位中图分类号:TU528.0文献标志码:Adoi:10.3969/j.issn.1007—9629.2013.01.020InfluenceOfMixingPrOcuresofSuperplasticizerandLatexonZetaPotentialofCementPastesZHONGS^i—y“以1,LJ.,i门一mPil”,HANDo,zg—do咒91,NIK“扎1’3(1.KeyLaboratoryofAdvancedCivilEngineeringMaterialsofMinistryofEducation,Ton西iUniversity,Shanghai201804,China;2.SinomaResearchInstitute,SinomaInternationalEngineeringCo.,Ltd.,Be巧ing100102,China;3.TechnicalCenter,ChinaStateConstructionEngineeringCo.,Ltd.,Be巧ing101300,China)Abstract:Becauseoflessthoroughstudyonthepropertiesofcementpasteswithsuperplasticizersandlatexmixedtogether,theinfluenceofdifferentmixingproceduresofsuperplasticizersandlatexonthe善poten—tialofcementpastes(fresh)wereanalyzedusingtheZetaProbeinstrument.Theexperimentalresultsshowthatwithaddingdifferentuse1evel(bymass)ofp01ycarboxylicsuperplasticizer(PC),thecementpasteswithbothPCandlatexaddedhavenegativeorpositiVe善potential.However,the善potentialofcementpasteswithbothnaphthaleneformaldehydecondensatesuperplasticizer(NF)andlatexaddedislowerthanthatofcementpasteswithNFaddedbuthigherthanthatofcementpasteswith1atexadded.AddingNFintocementpasteswithlatexadded,theabsolutevalueofequilibriumfpotentialofthecementpastesis10werthanthatofcementpasteswithNFadded,cementpasteswithlatexaddedandcementpasteswithbothNFandlatexadded.AddingPCintocementpasteswithlatexadded,the善potentialofthecementpastescanevenreachtheequilibrium}potentialofcementpastewithlatexadded.Whenlatexisaddedin,the善potentialofcementpastewith1.o%PCaddeddoesn’tchange,butthe}potentialofcementpastewith0.1%PCaddeddecreasesgreatlytoacertainvalue.ThefpotentialofcementpastewithNFadded收稿日期:201卜08一01;修订日期:2011一09—13第一作者:钟世云(1961),男,江西兴国人,同济大学教授,博士生导师,博士.E—mail:syzhong@ton翻i.edu.c“万方数据国内最好的聚羧酸减水剂公司三瑞企业www.sunrisechem.com.cn第1期钟世云,等:减水剂与乳液复掺对水泥浆zeta电位的影响107increasesfrom~10mVto一6mVwhen1atexisaddedin,andthenincreasesslowlywiththeincreaseofuseleVeloflatex.Byaddingsuperplasticizer(NForPC)andlatexintocementpastessimultaneouslyoraddinglatexintocementpasteswithsuperplasticizer(NForPC)added,theadsorbedproportionofp01y—merparticlesoncementgr...