预览加载中，请您耐心等待几秒...

碱激发矿渣胶凝材料的制备及其性能研究的综述报告.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

碱激发矿渣胶凝材料的制备及其性能研究的综述报告 Introduction Mineraladmixturesareessentialcomponentsintheproductionofdifferentcementitiousmaterials,includingconcrete,mortar,andpaste.Thesematerialsareusedforvariousconstructionapplications,suchasbuildingfoundations,roads,bridges,anddams.Mineraladmixturesalterthepropertiesofcementitiousmaterialsthroughtheirphysicalandchemicalinteractions.Alkali-activatedslag(AAS)isonesuchmaterial,whichisproducedbythealkalineactivationofgranulatedblastfurnaceslag(GBFS)withanalkaliactivatorsolution,suchassodiumhydroxide(NaOH)orpotassiumhydroxide(KOH).TheresultingAASisconsideredasustainableandenvironment-friendlyalternativetoconventionalcementitiousmaterialsbecauseofitslowcarbonfootprint,highmechanicalstrength,anddurability. ThisreportprovidesacomprehensivereviewoftherecentdevelopmentsinthepreparationandperformanceofAASusingdifferentactivatingagents.Specifically,thereportaimstodiscusstheeffectsofalkaliconcentration,activatorcomposition,curingconditions,andotherparametersonthepropertiesofAAS-basedmaterials. PreparationofAAS-basedMaterials ThepreparationofAAS-basedmaterialsinvolvesthealkalineactivationofGBFS,whichcontainssubstantialamountsofcalciumsilicates,aluminates,andferrites,toproduceareactiveslaggel.ThealkaliactivatorsolutionusedintheprocesstypicallycontainsNaOHorKOH,withaconcentrationrangingfrom5Mto16M.ThereactionbetweentheGBFSandthealkaliactivatorsolutionresultsinthedissolutionandprecipitationoftheamorphousslagcomponents,whichsubsequentlyreacttoformaporousandrigidslaggelmatrix. IthasbeenreportedthattheconcentrationandcompositionofthealkaliactivatorsolutionsignificantlyaffectthepropertiesoftheAAS-basedmaterials.Forexample,increasingtheconcentrationofNaOHfrom6Mto16MresultsinanincreaseinthecompressivestrengthoftheAAS-basedmaterialfrom30MPato87MPa.Similarly,theuseofpotassiumsilicate(K2SiO3)orsodiumsilicate(Na2SiO3)asanalkaliactivatorinsteadofNaOHorKOHleadstoanincreaseinthecompressivestrengthofAASspecimensbyupto50%.TheuseofamixedactivatorsystemconsistingofNaOHa