黄金尾矿制备高贝利特相胶凝材料试验研究-武汉理工大学学报.PDFVIP

第 30 卷 第 11 期 武 汉 理 工 大 学 学 报 Vol .30 No .11 2008年 11 月 JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY Nov .2008 黄金尾矿制备高贝利特相胶凝材料试验研究 张国强 ,肖国先 ,郜志海 ,周 慈 (苏州大学材料与化学化工学部 ,苏州 215021) 摘 要 : 利用黄金尾矿和石灰石,通过配料、粉磨、高温煅烧制备出富含高贝利特相矿物的胶凝材料,实现黄金尾矿的 资源化。采用X 射线衍射仪(XRD)测定矿物材料的矿物组成,用扫描电子显微镜(SEM)对其水化物相进行了研究 ,并 考察其胶凝性能。结果表明 :以黄金尾矿配以石灰石为原料可低温烧成富含高贝利特相矿物的水泥胶凝材料,其水化浆 体中水化产物AFt 晶相的数量较多,对浆体起到了良好的补偿收缩作用 ,强化了硬化水泥石的结构。 关键词 : 黄金尾矿 ; 胶凝材料 ; 高贝利特 ; 水化产物 中图分类号 : TQ 172 .72 文献标识码 : A 文章编号 :1671-4431(2008)11-0072-03 Research on Producing High-belite Cementitious Materials by Gold Mine Tailings ZHANG Guo-qiang ,XIAO Guo-xian ,GAO Zhi-hai ,ZHOU Ci (School of Chemistry ,Chemical Engineering and Materials Science ,Suzhou Universtiy ,Suzhou 215021 ,China) Abstract : It is an effectivemeasure to produce high-belite cementitious material by burning goldmine tailingsand limestone at high temperature after milling .The mineral composition of this cementitious material was measured using X-ray diffraction . The scanning electron microscopy (SEM) was also used to study its hydration production and cementitious property as well . The preliminary investigation shows that it iss feasible to generate high-belitemineral admixture using gold mine tailings .With- in the hydration products of the high-belite cementitious material ,the quantity of AFt phase was increased which could offer a reinforcement for the contraction effect of the paste .As a result ,the microstructurecould be improved and harden cement paste got more homogeneous and dense . Key words : gold mine tailings ; cementitious material ; high-belite ; hydration products 随着对水泥工业可持续发