硅酸盐通报2017，Vol.36Issue(7)：2167-2172,6.
新型混凝土表面防护材料的研究
New Type Surface Protection Materials for Concrete
摘要
Abstract
In the experiment,nano-SiO2,silica fume and fly ash were respectively used as mineral additive to modify cement-based materials,forming a protective layer on the surface of concrete.To explore the improvement mechanism of these additives,the chloride diffusion coefficient was determined by rule RCM and through SEM,XRD and DSC,the composition of modified cement-based materials' hydration products was studied,as well as its micro structure.The result suggestes that the mortar protective layer on the surface of concrete enhanced its ability to resist chloride ion erosion by 56.75％,and with the addition of fly ash,silica fume and nano-SiO2,their improvement effects are more obvious,meanwhile,their improvement ability is increased in turn.Fly ash increases cement stone's compactness with its micro aggregate effect and filling effect,while nano-SiO2 and silica fume facilitate cement 's hydration and generate second hydration,thus enhance its resistance to chloride ion erosion.The research finding shows that using ceramic mineral admixture for modification to form a protective layer can significantly enhance concrete's resistance to chloride ion erosion,laying the foundation of further study about the exterior protective system of ceramic coagulation body.关键词
氯离子侵蚀/砂浆保护层/纳米SiO2/硅灰/粉煤灰Key words
chloride ion erosion/mortar protective layer/nano-SiO2/silica fume/fly ash分类
建筑与水利引用本文复制引用
马保国,戚华辉,梅军鹏,李海南,刘晓海,姜文斌..新型混凝土表面防护材料的研究[J].硅酸盐通报,2017,36(7):2167-2172,6.基金项目
"十三五"国家重点研发计划(2016YFC0701003-05) （2016YFC0701003-05）
