新型复合材料论文：新型石膏基复合胶凝材料的性能和结构.pdf

全国中文核心期刊 新型石膏基复合胶凝材料的性能和结构 应俊，石宗利，高章韵 （湖南大学 材料科学与工程学院，湖南长沙 410082） 摘要：以脱硫石膏和氟石膏为基材，利用矿渣改性，并掺入普通硅酸盐水泥以及激发剂、保水剂等制备新型石膏基复合胶凝材 料。介绍了生产工艺，产品力学性能、耐水性和抗冻性。采用XRD 、ESEM 和DCS-TG 分析手段研究了石膏基复合胶凝材料的高强、 耐水机制。结果表明，制备的新型石膏基复合胶凝材料综合性能优良；二水石膏与钙矾石为结构骨架，水化硅酸钙（C-S-H）凝胶为 粘结剂的致密结构决定了材料的高强、耐水的性能；新生产方法提高了工业副产石膏的资源化利用和建筑材料生产的节能水平。 关键词： 石膏基复合胶凝材料；耐水性；抗冻性；结构骨架；硅酸钙（C-S-H）凝胶 （ ） 中图分类号：TQ177 ，X781.5 文献标识码：A 文章编号：1001-702X 2010 07-0007-04 The performance and structure of a new gypsum-based cementing composite YING Jun，SHI Zongli ，GAO Zhangyun （College of Materials Science and Engineering, Hunan University ，Changsha 410082，Hunan，China） The gypsum-based cementing composite is prepared by taking flue gas desulphurization gypsum and fluorgypsum as Abstract ： base material ，slag as modifier ，and adding Portland cement ，activator ，and aquasorb ，etc.. The production process ，mechanics ，water resistance and frost resistance properties of the product are introduced. The mechanism of high strength and water resistance of the gypsum -based cementing composite are studied by scanning electronic microscopy ，X -ray diffraction and differential scanning calorimetry-thermogravimetry analysis. The results indicate that the physical performances of gypsum-based cementing composite are good. The densified structure taking calcium sulfate dehydrate and ettringite as structural framework and C-S-H gel as binder leads the material to have high performances on mechanics and water resistance. This new manufacturing method efficiently improves the resource utilization of