- 張敏杰,蔣亞清,趙 越
2017年第6期
摘要
引用本文
摘??要:對海工高性能混凝土的配制與耐久性能進行了研究。采用粉煤灰、礦渣、聚羧酸高效減水劑和纖維素類增稠劑(VMA)外摻技術,通過正交試驗設計和配合比優化,選出C40、C45、C50強度等級混凝土最優配合比。結果表明,新拌混凝土初始坍落度為180~200mm,后期強度和耐久性能均滿足海工工程設計要求,混凝土氯離子遷移系數DRCM小于4×10-12m2/s,電通量小于800C,抗凍等級達到F200,抗滲等級遠大于W4;通過微觀分析,混凝土內部結構致密,有害孔較少,可有效防止環境有害離子的侵蝕。Abstract:Thepreparationanddurabilityofmarineengineeringhigh-performanceconcretearestudied.Usingtheadditivetechnologyofflyash,slag,polycarboxylicacidsuperplasticizer,andcellulosethickener(VMA),throughtheorthogonalexperimentdesignandtheoptimizationofmixproportion,theoptimalmixproportionofC40,C45,C50concreteisselected.Theresultsshowedthat,theinitialslumpofthefreshconcreteis180~200mm.Thelatestrengthanddurabilityperformancecanmeettherequirementsofcoastalengineering,thechloridemigrationcoefficient(DRCM)ofconcreteislessthan4×10-12m2/s,theelectricfluxisalsolessthan800C,theconcretefrostresistancegradecanreachF200,andconcreteimpermeabilitygradeismorethanW4.Throughmicroscopicanalysis,theinternalstructureofconcreteisverydense,whichhaslessharmfulhole,sotheconcretecaneffectivelypreventerosionoftheenvironmentalharmfulion.
張敏杰,蔣亞清,趙越.海工高性能混凝土配制及耐久性研究[J].混凝土與水泥制品,2017(6):1-5.
ZHANG M J, JIANG Y Q, ZHAO Y.Research on Preparation and Durability of Marine Engineering High-performance Concrete[J].China Concrete and Cement Products,2017(6):1-5.