WangYiren, WangDongmin, ZhaiMengyi, et al. Effect of polymeric aluminum on hydration hardening characteristics of lithium slag⁃cement composite cementitious materials[J]. Journal of Mining Science and Technology, 2019, 4(1): 86-94.
Citation: WangYiren, WangDongmin, ZhaiMengyi, et al. Effect of polymeric aluminum on hydration hardening characteristics of lithium slag⁃cement composite cementitious materials[J]. Journal of Mining Science and Technology, 2019, 4(1): 86-94.

Effect of polymeric aluminum on hydration hardening characteristics of lithium slag⁃cement composite cementitious materials

  • Lithiumslagisusedasasupplementarycementitiousmaterialincement⁃basedmaterialsdue toitspozzolanicactivity,butitslowerhydrationactivityleadstoadeclineinthemechanicalproperties anddurabilityofthecement⁃basedmaterial*Inthispaper,forthelowdegreeofhydrationoflithiumslag incompositecementitiousmaterials,aninorganicpolymeraluminumwasusedasanactivatortoimprove thehydrationactivityoflithiumslag*Theeffectsandmechanismofpolymericaluminumonhydration hardeningof lithium slag⁃cement composite cementitious materials were investigated through macro propertiesofcompressivestrengthandnon⁃evaporablewatercontent,andmicrocharacteristicsofhydra⁃ tionheat,mineralcompositionofhydrationproductsandBSEmicroscopicmorphology*Theresultsindi⁃ catethattheadditionofpolymericaluminumsignificantlyimprovesthecompressivestrengthandnon⁃e⁃
    vaporablewater content in the lithium slag⁃cement composite cementitious material,which increases 26*8% and5% respectivelyinthe28dperiod*Intheearlyhydration,polymericaluminumaccelerates themineralphasedissolutionandcrystalgrowthinthelithiumslag⁃cementcompositecementitiousma⁃ terial,andincreasesthetotalnucleationofhydrationproducts*Alargenumberofettringite,hydration calciumaluminates,calciumhydroxideandamorphoushydrationgelsappeareinthehydrationproducts, whichpromotehydrationoflithiumslag⁃cementcompositecementitioussystem,thedissolutionandero⁃ sionoflithiumslagparticles*
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