摘要
以铁尾矿为主要原料,氢氧化钠和水玻璃混合液为碱激发剂,制备地质聚合物凝胶材料。利用单因素试验和正交试验研究了固体原料的组分、物料液固比、激发剂的模数和浓度对地质聚合物抗压强度的影响,并分析了各因素对地质聚合反应的作用机理。结果显示:各因素影响铁尾矿基地质聚合物抗压强度的主次顺序为:物料液固比>激发剂浓度>激发剂模数>固体原料硅铝比;当物料液固比n(Na2O)/n(Al2O3)=0.8、激发剂浓度n(H2O)/n(Na2O)=7、激发剂模数n(SiO2)/n(Na2O)=1.6、固体原料硅铝比n(SiO2)/n(Al2O3)=3.2时,试验制备的地质聚合物养护抗压强度最高,养护28d时达到55.97MPa。
The geopolymer cementitious material was prepared by using iron tailings as the main raw materials, and the mixture of sodium hydroxide and water glass as alkali activator. The effects of composition, liquid-solid ratio, modulus and concentration of the alkali activator on the compressive strength of geopolymers were studied by orthogonal tests and single factor tests. The mechanism of various factors on geopolymerization was analyzed. The results showed that the primary and secondary order of the factors aff ecting compressive strength were liquid solid ratio>modulus of the alkali activator>activator concentration>solid materials silicon-aluminum ratio. The highest compressive strength reached 55.97 MPa when it was cured for 28 days, which was achieved at n (SiO2 )/n (Al2O3 )= 3.2,(SiO2 )/n (Na2O )= 1.6, n (Na2O )/n (Al2O3 )=0.8 and n (H2O)/n (Na2O )= 7.
作者
汪应玲
罗绍华
姜茂发
刘承军
邓明雪
赵鑫
Wang Yingling;Luo Shaohua;Jiang Maofa;Liu Chengjun;Deng Mingxue;Zhao Xin(School of Metallurgy, Northeastern University, Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education), Northeastern University, Shenyang, Liaoning, China;School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, Hebei, China)
出处
《矿产综合利用》
CAS
北大核心
2019年第5期121-126,共6页
Multipurpose Utilization of Mineral Resources
基金
国家自然科学基金(51674068,51874079)
河北省自然科学基金—钢铁联合研究基金(E2018501091)
河北省“三三三人才工程”培养经费(A2016005004)
中央高校基本科研业务项目-重点科技创新项目(N172302001)
关键词
赤泥
微波改性
Fe-Al基絮凝剂
Iron tailings
Geopolymer
Compressive strength
Process conditions
