水玻璃激发矿渣制备纳米地质聚合物研究  

Study on Preparation of Nano-geopolymer from Slag Powder Activated by Waterglass

作　　者：张耀君[1] 赵永林[1] 李海宏[1] 徐德龙[1] 

机构地区：[1]西安建筑科技大学材料科学与工程学院,西安710055

出　　处：《非金属矿》2009年第1期39-41,44,共4页Non-Metallic Mines

基　　金：陕西省自然科学基础研究计划资助项目(SJ08E106);教育部留学回国人员科研启动基金(200555)

摘　　要：采用扫描电镜(SEM)、结合能量散射X-射线能谱分析(EDXA)、场发射扫描电镜(FESEM),对水玻璃激发矿渣细粉水化产物的生成及发展进程中的微观形貌进行了系统的研究。在水化早期,矿渣玻璃体快速解体,形成大量的硅溶胶和铝溶胶覆盖于矿渣表面;随着龄期的延长,硅铝溶胶之间发生缩聚反应,生成相互搭接的树枝状网络结构的地质聚合物凝胶体,表明矿渣玻璃体的解体是一个形成溶胶的过程,而缩聚反应是一个形成凝胶的胶凝过程。纳米地质聚合物结构密实,抗压强度从1d的26.5MPa增至28d的60.1MPa。地质聚合物是由20nm左右的颗粒搭建成的网络结构所组成。The microstructural morphologies of hydration products by waterglass activating slag powder in period of the generation and evolution are systematically studied by scanning electron microscopy （SEM） coupled with energy dispersive X-ray analysis （EDXA） and field emission scanning electron microscopy （FESEM）. In the early stage of hydration, the glassy phase of slag powder rapidly disaggregates and forms a large amount of silicon sol covering with the surface of slag particles. With the increase of curing age, polycondensation reaction takes place between silicon sol and aluminum sol and produces the cementitious material of geopolymer with network structure through the overlapping of tree-branch geopolymer gels. It is demonstrated that the decomposition of glassy phase is a sol process and the polycondensation of [SiO4]4- and [AIO4]5- tetrahedrons is a gelation process. The structure of geopolymer becomes close-grained and the compressive strength increases from 26.5MPa in curing time for ld to 60.1MPa in curing time for 28d. The geopolymer consists of network structure with 20 nm particles.

关 键 词：水玻璃 矿渣细粉 水化 地质聚合物 微观形貌 

分 类 号：TQ172.78[化学工程—水泥工业]