再生微粉对海工混凝土抗氯离子侵蚀性能影响的研究  

Effect of re-production powder on marine concrete chloride penetration resistance

作　　者：代飞 郭蕾 赵日煦[1] 杨文[1] 黄汉洋 贺行洋 DAI Fei;GUO Lei;ZHAO Rixu;YANG Wen;HUANG Hanyang;HE Xingyang(China Construction Ready Mixed Concrete Co. Ltd.,Wuhan 430074,China;Office for Building Energy Saving,Wuhan 430015,China;The School of Civil Engineering,Architectural and Environment,Hubei University of Technology,Wuhan 430068,China)

机构地区：[1]中建商品混凝土有限公司,湖北武汉430074 [2]武汉市建筑节能办公室,湖北武汉430015 [3]湖北工业大学土木建筑与环境学院,湖北武汉430068

出　　处：《新型建筑材料》2019年第7期13-15,31,共4页New Building Materials

摘　　要：混凝土预拌厂废渣与其它废渣粉磨制备再生微粉,采用RCM法研究再生微粉对混凝土氯离子扩散系数的影响规律,同时制备相应水泥净浆,通过XRD、SEM、MIP、EDS等测试方法分析其作用机理。结果表明,再生微粉可显著减小海工混凝土氯离子扩散系数。再生微粉减少了水化产物中Ca(OH)2含量,生成了低钙硅比的C-S-H凝胶,同时优化了孔结构,提高了海工混凝土的抗氯盐侵蚀性能。The re-production powder was made by waste residue of ready-mix plant and other slags. The influence law of re-production powder on the chloride diffusion coefficient was studied by RCM method,and meanwhile corresponding cement pastes were prepared. Its function mechanism was analyzed by the use of XRD,SEM,MIP and EDS. The results show that chloride diffusion coefficient of marine concrete decreased significantly by the re-production powder because of the lower content of Ca(OH)2 in the hydration products and C-S-H gel with low calcium silicon ratio which were formed. In addition,the re-production powder refined the concrete pore structure,that can improve the chloride penetration resistance of the marine concrete.

关 键 词：再生微粉 海工混凝土 氯离子扩散系数 孔结构 

分 类 号：TU528.36[建筑科学—建筑技术科学]