铝掺杂水化硅酸钙的纳微米结构及其性能研究

项目名称： 铝掺杂水化硅酸钙的纳微米结构及其性能研究

项目编号： No.51272193

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 吕林女

作者单位： 武汉理工大学

项目金额： 80万元

中文摘要： 水化硅酸钙（C-S-H）是硅酸盐水泥水化的最重要水化产物。铝（Al）是硅酸盐水泥中继钙、硅之后的主要元素，随着粉煤灰、矿渣等富含活性铝的工业废渣广泛应用于混凝土，C-S-H结构中Al的掺杂在混凝土力学性能、稳定性等方面发挥着愈来愈重要的作用。项目拟围绕铝掺杂水化硅酸钙（C-A-S-H）的纳微米结构及其性能问题，研究Al在C-A-S-H结构中的配位形式和位置；C-A-S-H的纳微米结构特征参数（层间距、硅氧四面体聚合度、Si-O链长、Al的配位、孔结构等）随原始组成和反应条件的演变机制；C-A-S-H的弹性模量、硬度、徐变等微观力学性能与化学稳定性；揭示C-A-S-H组成、结构与性能的关系；设计和制备具有优异性能的C-A-S-H，探索其对水泥浆体中C-A-S-H结构的诱导与调控机理。研究成果对丰富水泥化学应用基础理论，开发新一代具有优异性能的水泥基复合材料，以及学科交叉发展具有重要意义。

中文关键词： 水化硅酸钙；铝掺杂；纳微米；结构；性能

英文摘要： Calcium silicate hydrate is the most important hydration product of Portland cement. Auminium is the primary element after calium and silicon in Portlant cement. Accompanied with a large amount of mineral admixtures such as fly ash and slag are applied in concrete,aluminum substitution in calcium silicate hydrate plays much more important role in the mechanical properties, drying shrinkage, creep and chemical stability of concrete than before. Coordination environment of aluminum in the nanostructure of C-S-H will be studied. Effect of chemical composition and reaction condition of aluminum-substituted calcium silicate hydrates (C-A-S-H) on its interlayer spacing, polymerization degree and mean chain length of silicon tetrahedral, coordination state of aluminum, and pore characteristics will be investigated. Elastic modulus, stiffness, creep and chemical stability of C-A-S-H, and the relationship among chemical composition, structure and property of C-A-S-H will be investigated. C-A-S-H with excellent properties will be designed and prepared, and the induction, adjusting and controlling mechanism of C-A-S-H in cement paste will be studied. This project is important for enriching the applied basic theory of cement chemistry, exploring new cement-based material with excellent property, and courses cross developmen

英文关键词： calcium silicate hydrate；aluminum substituted；nano-micro；structure；property