掺杂对硅铝酸二钙结构及水化活性的影响  

Effect of doping on structure and hydration reactivity of dicalcium aluminosilicate

作　　者：王宏霞[1] 刁桂芝[1] 刘光华[1] 

机构地区：[1]中国建筑材料科学研究总院绿色建筑材料国家重点实验室,北京100024

出　　处：《中国建材科技》2019年第2期47-49,共3页China Building Materials Science & Technology

基　　金："十三五"国家重点研发计划项目(2016YFB0303500)

摘　　要：利用X射线衍射仪、微量热分析、扫描电子显微镜等,研究了MgO、BaO及MgO与Al_2O_3复掺对硅铝酸二钙C_2AS结构及水化活性的影响。结果表明,BaO掺杂对C_2AS的结构几乎无影响,3%掺量的MgO能促使C_2AS某一晶面的衍射峰增强。MgO与Al_2O_3复合掺杂可促进Q相的生成。较之MgO、BaO单掺,MgO与Al_2O_3复合掺杂可大幅提高C_2AS的水化活性,其7d的水化总放热量可达到400J/g。Effect of MgO, BaO and MgO+Al2O3 doping on Structure and Hydration Reactivity of dicalcium aluminosilicate(C2AS) was studied by X-ray diffraction, scanning electron microscopy and isothermal calorimetry. The results showed that BaO doping has almost no effect on the structure of C2AS, and 3% MgO can promote the diffraction peak intensity of a crystal plane of C2AS. MgO and Al2O3 doping can promote the formation of Q phase. Compared with MgO and BaO single doping, MgO and Al2O3 doping can greatly improve the hydration activity of C2AS, and the total hydration heat of 7 d can reach 400 J/g.

关 键 词：掺杂 硅铝酸二钙 结构 水化活性 

分 类 号：TQ172.1[化学工程—水泥工业]