·612023年5月试验与研究江西建材碱激发凝灰岩石粉-水泥复合胶凝材料性能研究唐智，宋云龙”，姜美玲*1.长沙市财政评审中心，湖南长沙410205;2.山东建筑大学设计集团有限公司，山东济南250013;3.中南大学土木工程学院，湖南长沙410004摘要：文中采用凝灰岩石粉替代部分水泥，向其中掺入不同掺量和种类的碱激发剂（脱硫石膏、NaOH、Na,SiO3）激发凝灰岩石粉的活性，借助对试件的力学性能测试，比较不同激发剂的效果。此外，利用X射线衍射（XRD）和扫描电镜（SEM）等技术研究试样的成分和微观形貌。结果表明，随着凝灰岩石粉掺量增加，试件强度降低；凝灰岩石粉含量较高时，碱激发剂的掺入能够提高试件抗压强度；凝灰岩石粉含量较低时，碱激发剂的掺入会使试件的抗压强度降低。三种激发剂中，脱硫石膏效果最好，主要表现为对试件反应产物的影响最小，试件的微观结构也最紧密。关键词：凝灰岩石粉；碱激发；力学性能；微观结构中图分类号：TQ172文献标识码：A文章编号：1006-2890（2023）05-0061-06StudyonPropertiesofAlkali-ActivatedTuffPowder-CementCompositeCementitiousMaterialsTangZhil,SongYunlong’,JiangMeiling3*1.ChangshaFinancialEvaluationCenter,Changsha,Hunan410205;2.ShandongJianzhuUniversityDesignGroupCo.Ltd.,Jinan,Shandong250013;3.SchoolofCivilEngineering,CentralSouthUniversity,Changsha,Hunan410004Abstract:Inthispaper,tuffpowderwasusedtoreplacepartofcement,anditisproposedtostimulatetheactivityoftuffpowderbyaddingdifferentamountsandtypesofalkaliactivators(desulfurizationgypsum,NaOH,Na,SiO,)toit.Themechanicalpropertiesofthepreparedsamplesweretestedtoinvestigatetheeffectsofdifferentalkaliactivators.Inaddition,X-raydiffraction(XRD)andscanningelectronmicroscopy(SEM)wereusedtostudythecompositionandmicroscopicmorphologyofthesamples.Theresultsshowthatasthecontentoftuffrockpowderincreased,thestrengthofthespecimendecreased.Also,whenthecontentoftuffpowderwashigh,theadditionofalkaliactivatorcouldimprovethecompressivestrengthofthespecimen,butwhenthecontentoftuffrockpowderislow,thestrengthofalkaliactivatorIncorporationwillreducethecompressivestrengthofthespecimen.Amongthethreeactivators,theeffectofdesulfurizedgypsumasactivatorwasthebest.Thisisrefl...
