摘要
运用NMR、IR等分析手段,采用结构分析的方法研究了赤泥基胶凝材料的水化过程,揭示了胶凝材料钙硅比对水化产物Na+固化性能的影响规律。结果表明,随着钙硅比的降低,在Al对Si的取代作用下,[Si(Al)O4]结构单元聚合度增大,桥[SiO4]、[AlO4]四面体增多,Si以Q1、Q2结构形式存在的C-S-H凝胶转变为具有SiQ2、SiQ3和SiQ4结构单元的(Na,Al)-C-S-H凝胶,利于Na+以化学吸附和化学固溶形式的固化。
The hydration process of red mud-based cementing material is studied by NMR and IR means and by structural analysis method. The effect of Ca/Si ratio of red mud cementing material on the solidification performance of Na ^＋ of hydration product is disclosed. The results show that with the decrease of Ca/Si Ratio, along with the substitution of Al for Si, the structural unit polymerization degree of [ Si（Al） O4 ] increases and [ SiO4 ] and [ AlO4 ] tetrahedra increase. Consequently, the C-S-H gel where Si occurs in Q 1 and Q2 forms turns into （Na, Al）-C-S-H gel with SiQ2, SiQ3 and SiQ4 structural units, benefiting the solidification of Na ^＋ in forms of chemical adsorption and chemical sosoloid.
出处
《金属矿山》
CAS
北大核心
2008年第6期130-137,144,共9页
Metal Mine
基金
国家自然科学基金项目(编号:50674062)
国家科技支撑计划项目(编号:2006BAE03A11)
关键词
赤泥基胶凝材料
Na^+的固化
钙硅比
Red mud-based cementing material, solidification of Na ^＋ , Ca/Si Ratio
