摘要
以钼尾矿、矿渣、熟料和石膏为原料制备胶凝材料,研究了钼尾矿在胶凝材料中的掺量、减水剂掺量、养护工艺对胶砂试块性能的影响,并通过XRD和SEM-EDS对水化产物进行了深入研究。结果表明,当钼尾矿在胶凝材料中掺量为20%、减水剂掺量为0.4%、采用60℃湿热养护所制备的钼尾矿胶砂试块力学性能最好,28 d抗压强度可以达到73.2 MPa。利用钼尾矿制备的胶凝材料的水化产物以钙矾石和C-S-H凝胶为主,二者的相互交织促进了胶砂试块强度的增长。
Cementitious materials were prepared with molybdenum tailings, slag, clinker and desulfurization gypsum. The influence of dosage of molybdenum tailings, dosage of water reducing agent anti curing process on compressive strength was researched. The hydration products of gelled material were analyzed with XRD and SEM. The results show that when the mass ratio of molybdenum railings in cementitious materials is 15%, dosage of PC super plastici- zer is 0. 4% amount of cement, curing process is wet and heat curing at 60 ~C ,the highest compressive strength of molyb- denum tailings concrete is 73. 2 MPa. The hydration products of gelled material prepared with molybdenum tailings are mainly ettringite and C-S-H gel. The intertwining of ettringite and C-S-H gel,has enhanced the strength of concrete.
作者
崔孝炜
狄燕清
刘璇
南宁
周春生
Cui Xiaowei Di Yanqing Liu Xuan Nan Ning Zhou Chunsheng(College of Chemical Engineering and Modem Materials, Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, Shangluo University, Shangluo, Shaanxi, Chin)
出处
《矿产综合利用》
北大核心
2017年第4期102-106,共5页
Multipurpose Utilization of Mineral Resources
基金
商洛市科技计划项目(SK2014-01-03)
陕西省自然科学基金项目(2014JM2055)
关键词
钼尾矿
胶凝材料
抗压强度
水化产物
Molybdenum tailings
Cementitious materials
Compressive strength
Hydration products
