碱激发胶凝材料:早期成核、化学相演变和体系性能（英文）

发布时间：2018-03-17 16:11

本文选题：混凝　切入点：耐久性　出处：《硅酸盐学报》2015年10期 　论文类型：期刊论文

【摘要】：近些年,通过碱激发硅铝酸质材料形成聚合物水泥基材料的研究受到了广泛关注。由于在此聚合物胶凝体系中,硅铝质原料存在多样性,包括粉煤灰、矿渣、煅烧高岭石等,因此其原料化学性质在动力学和固相演变过程中起到非常重要的作用,并决定了最终产品的化学和物理性质。分析了原料化学组成对从溶解到最终水化产物性能的碱激发全过程的影响。并使用了包括X射线同步衍射分析在内的一系列分析技术对多种原料的无定形和沸石状结构进行了表征。研究了具有特定无定形SiO_2/Al_2O_3比的钠锅硅酸盐沸石在Al_2O_3-SiO_2-H_2O凝胶中的结晶趋势,并基于可识别的三元相图中的组成结构,研究了钙离子和剩余阳离子种类的主要影响。讨论了不同体系的相组成和化学成分、物相转变、微观结构变化及其长期强度发展和耐化学性的关系。
[Abstract]:In recent years, much attention has been paid to the formation of polymer cement-based materials by alkali excitation of silica-aluminate materials. In this polymer cementitious system, there are many kinds of silica-alumina raw materials, including fly ash, slag, calcined kaolinite, etc. So the chemical properties of the raw materials play a very important role in the process of kinetics and solid evolution. The chemical and physical properties of the final product were determined. The influence of the chemical composition of the raw material on the whole process of alkali excitation from dissolution to the final hydration product was analyzed. A series of methods, including X-ray synchronous diffraction analysis, was used. The amorphous and zeolite-like structures of various raw materials were characterized by column analysis. The crystallization trend of sodium pan silicate zeolites with a specific amorphous SiO_2/Al_2O_3 ratio in Al_2O_3-SiO_2-H_2O gels was studied. Based on the structure of the recognizable ternary phase diagram, the main effects of calcium ions and residual cations are studied. The phase composition, chemical composition and phase transition of different systems are discussed. Microstructural changes and the relationship between long term strength development and chemical resistance.
【作者单位】： CSIRO
【分类号】：TU528

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