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时间:2017-12-07
《石灰石粉_粉煤灰_矿粉多元复掺对混凝土性能的影响》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、doi:10.3969/j.issn.1002-3550.2014.08.019石灰石粉-粉煤灰-矿粉多元复掺对混凝土性能的影响冯庆革1a,杨阳1b,乔永平2,蒋玉柳3,王燚3(1.广西大学a.环境学院;b.化学化工学院,广西南宁530004;2.广西建设工程质量安全监督总站,广西南宁530022;3.南宁市建筑管理处,广西南宁530023)摘要:研究了石灰石粉按不同比例分别取代矿粉和粉煤灰的多元复掺方式以及CTF混凝土增效剂的掺入对混凝土工作性能、强度和抗氯离子渗透性的影响。试验结果表明:在适宜掺量下,石灰
2、石粉等量替代粉煤灰或矿粉,可以有效地改善工作性能,而随着替代量的增加,工作性能呈先增后减的趋势;石灰石粉取代粉煤灰或矿粉的量在50%之内时,对混凝土各龄期强度影响不大,但完全替代时,对混凝土的后期强度发展不利;石灰石粉替代粉煤灰或矿粉对混凝土的抗氯离子渗透性不利,电通量随替代量增加而增大;CTF混凝土增效剂的掺入可以有效地改善混凝土的和易性,提高强度以及抗氯离子渗透性。关键词:石灰石粉;矿粉;粉煤灰;CTF混凝土增效剂;多元复掺中图分类号:TU528.041文献标志码:A文章编号:1002-3550(2014
3、)08-0068-03Multivariatemixedeffectoflimestonepowder-flyash-slagpowderontheperformanceofconcreteFENGQingge1a,YANGYang1b,QIAOYongping2,JIANGYuliu3,WANGYi3(1a.CollegeofEnvironment;b.CollegeofChemistryandChemicalEngineering,GuangxiUniversity,Nanning530004,China
4、;2.Guangxiconstructionengineeringqualityandsafetysupervisioncentralstation,Nanning530022,China;3.NanningArchitecturalAdministrativeOffice,Nanning530023,China)Abstract:Slagpowderandflyashwerereplacedwithlimestonepowderbydifferentqualityratios,inthisway,itdis
5、cussedtheinflu-enceofthecombineduseofmineraladditiveandtheCTFconcretesynergist,ontheworkability,strengthandtheresistancetochlorineionpenetrationofconcrete.Resultsofthetrialindicatedthatundertheappropriatemixcontentlimestonepowderequallyreplacingflyashorslag
6、,caneffectivelyimprovetheworkingperformance,theworkabilityincreasedfirstlyandthendecreasedastheincrementofre-placement.Limestonepowderreplacedtheamountofflyashorslagwithinsubstitutionratio50%,itdidnotmuchaffectthestrengthofconcrete,butcompletelyreplacing,th
7、elaterstrengthdevelopmentofconcretedevelopedslowly.Limestonepowderinsteadofflyashorslagontheresistancetochlorideionpermeabilityofconcrete,electricfluxincreasedwithincreasingamountofreplacement.TheCTFconcretesynergistcaneffectivelyimprovetheworkability,enhan
8、cethestrengthandtheresistancetochlorideionpermeabilityofconcrete.Keywords:limestonepowder;slagpowder;flyash;CTFconcretesynergist;multivariatemixed混凝土和易性的同时提高密实性,保持甚至提升其强度,减少混凝土开裂及提高可泵性,同等条件下达到低标高能的效应[5
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