2023年第6期（总第404期）Number6in2023(TotalNo.404)doi:10.3969/j.issn.1002-3550.2023.06.019混凝土ConcreteMATERIALANDADMINICLE原材料及辅助物料蛋壳粉对偏高岭土一水泥水化和强度的影响胡春华，马腾（湖北工业大学土木建筑与环境学院，湖北武汉430064)摘要：为探究蛋壳粉(ESP)对偏高岭土(MK)一水泥体系的影响，将蛋壳粉与偏高岭土以不同的质量比取代水泥制备试件，对试件的强度结果以及水化产物进行分析。结果表明,ESP与MK分别取代10%水泥的试件，与单掺20%MK的水泥相比，各个龄期强度除3d强度降幅较大外,7、28d强度都仅有略微的降低。与对照组PC相比3d强度降低过大,7d强度略微降低,28d强度略高于PC;ESP和MK分别取代10%和20%水泥的试件，与单掺30%MK相比，各个龄期强度除3d强度略微降低外，7、28d强度大致相同，与PC相比有类似结果。所有复掺试样中，ESP和MK的分别取代5%和20%水泥试件抗压强度结果最优，与PC相比提升了约15%。偏高岭土-水泥体系中加人蛋壳粉可增加浆体溶液中碳酸根离子的浓度，与偏高岭土中的铝相结合生成碳酸铝盐，可增加水泥水化产物体积，从而提高水泥后期强度的发展。关键词：蛋壳粉；偏高岭土；水化；强度；影响机理中图分类号：TU528.041(CollegeofCivilEngineering,ArchitectureandEnvironment,HubeiUniversityofTechnology,Wuahan430064,China)Abstract:Toexplorethecompositeeffectofeggshellpowder(ESP)andmetakaolin(MK)incement,eggshellpowderandmetakaolinwerecompoundedtoreplacecementwithdifferentmassratios.Theeffectofcompoundmixingeggshellpowderandmetakaolinoncementstrengthwasstudied.TheresultsshowthatESPandMKreplace20%cementwith1:1.Comparedwithcementwith20%MK,thestrengthateachagedecreasesslightlyat7and28days,exceptthatthestrengthat3daysdecreasesgreatly.ComparedwithPC,3dstrengthdecreasedtoomuch,7dstrengthdecreasedslightly,and28dstrengthwasslightlyhigherthanPC.WhenESPandMKreplace30%cementwith1:2,comparedwithcementwith30%MK,the3dstrengthdecreasesslightly,andthe7dand28dstrengthisbasicallythesame.ComparedwithPC,the3dstrengthislower,the7dstrengthisbasicallythesame,the28dcompressivestrengthisslightlyhigherthanPC,andtheflexuralstrengthissignificantlyimproved.Amongallthemixedsamples,thecompositestrengthofESPandMKwith1:4insteadof25%cementisth...
