聚乙烯醇纤维改性混凝土及抗盐蚀研究贾青(杨凌职业技术学院,陕西杨凌712100)收稿日期:2023-05-17作者简介:贾青(1982—),女,山东聊城人,硕士研究生,讲师,研究方向为建筑新材料。联系方式:15388627856摘要:针对普通混凝土耐久性和抵抗恶劣环境差的问题,提出通过聚乙烯醇纤维对混凝土进行改性,并研究了纤维对混凝土的改性效果。试验结果表明,当聚乙烯醇纤维掺量为12%时(PVA12样品),混凝土坍落度较基础混凝土下降了约45%。在28d龄期,PVA12混凝土抗压强度约为65MPa,较基础混凝土抗压强度提升了约28%;抗折强度达到了8.5MPa,较基础混凝土提升了约55%;剩余强度较PVA6混凝土剩余强度增加了约210%;电阻率较基础混凝土大18.6Ω·cm;氯离子迁移系数与基础混凝土较为接近,满足抗氯离子渗透能力极高的标准要求。改性混凝土表现出良好的工作性能、力学性能和抗氯离子渗透能力。关键词:聚乙烯醇纤维;抗盐蚀性能;氯离子迁移系数;力学性能中图分类号:TU528.572文献标识码:A文章编号:2096-3408(2024)01-0038-05StudyonPolyvinylAlcoholFiberModifiedConcreteandItsSaltCorrosionResistanceJIAQing(YanglingVocational&TechnicalCollege,Yangling712100,China)Abstract:Inresponsetothepoordurabilityandresistancetoharshenvironmentsofordinaryconcrete,itisproposedtomodifyconcreteusingpolyvinylalcoholfibers,andthemodificationef⁃fectoffibersonconcreteisstudied.Theexperimentalresultsshowedthatwhenthecontentofpoly⁃propylenealcoholfiberis12%(PVA12sample),theslumpofconcretedecreasesbyabout45%comparedtothebasicconcrete.Attheageof28days,thecompressivestrengthofPVA12concreteisabout65MPa,whichisabout28%higherthanthecompressivestrengthofthebasicconcrete;Theflexuralstrengthreached8.5MPa,whichisabout55%higherthanthebasicconcrete;There⁃sidualstrengthofPVA6concretehasincreasedbyabout210%comparedtothatofPVA6concrete;Theelectricalresistivityis18.6Ω·cmhigherthanthatofthebasicconcrete,andthechlorideionmigrationcoefficientisrelativelyclosetothatofthebasicconcrete,meetingthehighstandardre⁃quirementsforresistancetochlorideionpenetration.Itexhibitsgoodworkingperformance,me⁃chanicalproperties,andresistancetochlorideionpenetration.Keywords...