低活性铝硅质尾矿基矿物聚合材料的抗化学侵蚀性能研究  

Research on Resistance to Chemical Attack of the Low-reactive Aluminosilicious Tailing Based Geopolymer

作　　者：焦向科[1,2,3] 张一敏[4] 

机构地区：[1]江西理工大学资源与环境工程学院,赣州341000 [2]江西理工大学江西省矿冶环境污染控制重点实验室,赣州341000 [3]江西理工大学工程研究院,赣州341000 [4]武汉理工大学资源与环境工程学院,武汉430070

出　　处：《硅酸盐通报》2014年第12期3097-3102,共6页Bulletin of the Chinese Ceramic Society

基　　金：江西理工大学博士科研启动基金项目(3401223152);江西理工大学科研基金项目重点课题(NSFJ2014-K01);江西省教育厅项目(GJJ14426);江西省科技厅青年科学基金项目(20142BAB216008);国家"十二五"科技支撑计划重点项目(2011BAB05B04)

摘　　要：以某低活性铝硅质尾矿作为硅铝原料(基质),分别与四种不同的铝校正料复合,在碱硅酸盐溶液激发作用下制备矿物聚合材料;同时将该尾矿与硅灰以及钙质原料(包括矿渣和钢渣)复合制备"免配碱激发剂溶液型"矿物聚合材料。对各试样的抗化学侵蚀性能进行测试,并与普通硅酸盐水泥砂浆试样进行对比;在微观上借助SEM和FTIR对代表性试样进行表征。结果表明,以铝酸盐水泥为铝校正料制备的矿物聚合材料试样经H2SO4溶液侵蚀后有较多沸石相生成,其抗化学侵蚀性能较为良好;普通硅酸盐水泥砂浆试样经硫酸盐侵蚀后其初期强度有所提高,但后期强度可能会因钙矾石的增多而降低。Combined with four different Al-correcting materials respectively and activated by alkaline silicate solution,a low-reactive aluminosilicious tailing was used as Si-Al source material（ base material）for geopolymer synthesis. Meanwhile,the tailing was combined with silica fume,calcium-bearing source materials（ including ore residue and steel residue） for preparing the ＂ alkaline solution-free＂ geopolymer samples. Compared with the ordinary Portland cement（ OPC） mortar sample,resistance to chemical attack of the geopolymer samples were tested; In the microscopic view,the representative geopolymer sample was characterized by SEM and FTIR analyses. Results showed that,much zeolite phase formed in the aluminate cement-contained geopolymer sample after chemical attack of H2SO4 solution,giving rise to its excellent resistance to chemical attack; After chemical attack of sulphate solution,the initial strength of OPC mortar sample improved,but its long-term strength would most likely decrease due to the increase of ettringite.

关 键 词：低活性铝硅质尾矿 铝校正料 钙质原料 矿物聚合材料 抗化学侵蚀性能 

分 类 号：TQ177[化学工程—硅酸盐工业]