硅灰配制海工自密实高性能混凝土的研究.pdfVIP

学兔兔 2013年第 7期(总第 285期 ) 混 凝 土 原材料及辅助物料 Number 7 in 2013(Tota1 No．285) MATERIAL AND ADMINICLE Concrete 硅灰配制海工自密实高性能混凝土的研究 王成启，张悦然 (中交上海三航科学研究院有限公司，上海 200032) 摘 要： 开展了复掺硅灰与矿渣粉海工自密实高性能混凝土的试验研究。试验结果表明，矿渣粉较大的海工自密实混凝土 作 性较差，采用硅灰替代矿渣粉可改善海工自密实混凝土的工作性，在复掺硅灰和矿渣粉总掺量为70％，硅灰掺量5％的条件下，掺 人55％～65％矿渣粉自密实混凝土具有较高的流动性、填充性、间隙通过性和抗离析性等工作性；28 d抗压强度大于50MPa，56 d 的电通量小于1 000C，90d扩散系数小于1．5x10 zm2／s，具有较高的抗压强度和抗氯盐侵蚀性能，满足海洋环境下抗氯盐侵蚀的 质量要求。 关键词：硅灰；矿渣粉；海工自密实高性能混凝土；流动性；填充性；间隙通过性；抗氯盐侵蚀性能 中图分类号： TU528．041 文献标志码： A 文章编号： 1002—3550(2013)07—0076—04 Experimental study of high performance serf—compacting concrete for marine structure with silica fume WANGChengqi，ZHANG Yueran (ChinaCommunicationsShanghaiThirdHarborEngineeringScienceandTechnologyResearchInstituteCo．，Ltd．，Shanghai200032，China) Abstract： High performance self-compacting marine concrete with silica fume and slag powder was experimentally studied．Experimen- ta1 results showed that the workability of high perform ance self-compacting marine concrete with high content slag powder was bad and the workability could be improved by using limestone powder．Moreover，the fluidity and filling ability and passing ability and segregation resistance and etc of self-compacting concrete containing 5％ silica fume and 55％-65％ slag powder was good when mineral admixtures content was 70％ and it satisfied marine concrete construction．At the same time，concrete’compressive strength in 28 d was over 50 MPa and charge passed in 56 d was under 1 000 C and chloride