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时间:2018-07-26
《基于致密配合比法的索塔清水混凝土配合比设计及性能研究》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、doi:10.3969/j.issn.1002-3550.2012.10.030基于致密配合比法的索塔清水混凝土配合比设计及性能研究万纯斌1,唐凯2,李北星2,胡峰强3(1.江西省交通运输厅九江长江公路大桥项目建设办公室,江西九江332000;2.武汉理工大学硅酸盐建筑材料国家重点实验室,湖北武汉430070;3.南昌大学建筑工程学院,湖北南昌330031)摘要:结合九江长江公路大桥索塔工程,采用致密配合比方法对C50高性能清水混凝土进行了配合比设计,通过试验验证了混凝土的性能。试验结果表明:粉煤
2、灰填充细骨料的填塞率α为13%,粉煤灰与细骨料混合物填充粗骨料的填塞率β为45%时,粉煤灰-细骨料-粗骨料粒料系统达到最密实堆积;水泥浆的富裕系数n为1.3和1.35时,设计出的高性能混凝土的工作性、力学性能和耐久性均满足索塔工程的设计和施工要求,且经济性较优。混凝土在索塔工程中的应用效果良好,索塔混凝土的外观质量完全达到了清水混凝土的质量要求。关键词:致密配合比设计法;清水混凝土;配合比;性能中图分类号:TU528.062文献标志码:A文章编号:1002-3550(2012)10-0100-03
3、Mixtureproportionandpropertiesoffair-facedconcreteforcablesupporttowerusingadensifiedmixturedesignalgorithmWANChun-bin1,TANGKai2,LIBei-xing2,HUFeng-qiang3(1.JiujiangYangtzeRiverExpresswayBridgeProjectConstructionOffice,DepartmentofTransportationJiangx
4、iProvince,Jiujiang332000,China;2.StateKeyLaboratoryofSilicateMaterialsforArchitecture,WuhanUniversityofTechnology,Wuhan430070,China;3.SchoolofCivilEngineeringandArchitecture,NanchangUniversity,Nanchang330031,China)Abstract:Aimingattheengineeringpracti
5、ceofcablesupporttowerofJiujinagYangtzeRiverExpresswayBridge,themixtureproportionofC50gradehighperformancefair-facedconcretehasbeendesignedusingadensifiedmixturedesignalgorithm(DMSA),andtheconcreteproper-tiesweretestedandverified.Theexperimentalresulti
6、ndicatedthatwhenthefillingratioαoffineaggregatefilledwithflyashis13%andthefill-ingratioβofcoarseaggregatefilledwiththemixtureofflyashandfineaggregateis45%,themineralparticlessystemincludingflyash,fineag-gregateandcoarseaggregatereachedtheclosestpackin
7、g;whenthecementpasterichcoefficientnis1.3and1.35,theworkability,mechanicalpropertiesanddurabilityofthedesignedHPCmixturescanmeetthedesignandconstructionrequirementsofcablesupporttowerengineering,andtheproductioncostofconcretemixturesisrelativelyeconom
8、ical.Theconcretemixtureshavebeenconfirmedbytheapplicationincablesupporttowerprojectsandtheconcreteappearancemeetsthequalityrequirementsforthefair-facedconcrete.Keywords:densifiedmixturedesignmethod;fair-facedconcrete;mixtureproportion;properti
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