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    孙文标, 冯向鹏. [Si(Al)O4]四面体聚合度对Na+固化性能的影响[J]. 机械工程材料, 2009, 33(6): 40-44.
    引用本文: 孙文标, 冯向鹏. [Si(Al)O4]四面体聚合度对Na+固化性能的影响[J]. 机械工程材料, 2009, 33(6): 40-44.
    shu
    SUN Wen-biao, FENG Xiang-peng. Influence of [Si(Al)O4] Polymerization Degree on Solidification of Na+[J]. Materials and Mechanical Engineering, 2009, 33(6): 40-44.
    Citation: SUN Wen-biao, FENG Xiang-peng. Influence of [Si(Al)O4] Polymerization Degree on Solidification of Na+[J]. Materials and Mechanical Engineering, 2009, 33(6): 40-44.
    shu

    Si(Al)O4四面体聚合度对Na+固化性能的影响

    Influence of Si(Al)O4 Polymerization Degree on Solidification of Na+

      摘要
    • 摘要: 运用核磁共振分析手段(NMR),采用结构分析的方法研究了赤泥基胶凝材料的水化过程,探讨了Si(Al)O4四面体聚合度对Na+固化性能的影响.结果表明:当原料中硅以SiQ0、SiQ1等低聚合度形式存在时,由于低聚合度的Si(Al)O4四面体易在早期发生解聚,并在富含Ca2+的溶液中发生反应生成钙硅比较高的C-S-H凝胶,这不利于Na+的固化;当硅主要以SiQ2、SiQ3等中聚合度形式存在时,由于水化后期Si(Al)O4四面体的逐渐解聚和铝对硅的取代作用,促进了低钙硅比的(Na,Al)-C-S-H凝胶的生成,改善了Na+的固化性能;而在硅主要以SiQ4高聚合度形式存在时,又不利于Na+固化.

       

      Abstract: Using structural analysis methods,the hydration process of cementitious materials and the effect mechanism of the polymerization degree of Si(Al)O4 on the solidification of Na+ during hydration process were studied.The results indicate that the Si(Al)O4 polymerization degree in raw materials had a remarkable influence on the solidification of Na+.When Si existed in the form of SiQ0 and SiQ1,it depolymerized in the early stage of hydration process,and then reacted with Ca2+ in the solution to form high Ca/Si C-S-H gel.When Si existed in the form of SiQ2 and SiQ3,it was depolymerized mainly in the late stage of hydration process,then Al readily entered the Si(Al)O4 tetrahedral sites and made the hydration into low Ca/Si (Na,Al)-C-S-H gel,which was more useful for the solidification of Na+.When Si existed in the form of SiQ4,it was not useful for the solidification of Na+.

       

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