不同活化方式锂渣地聚物性能研究  

Performance of Lithium Slag Geopolymer with Different Activation Process

作　　者：刘柯阳 何燕 蒋明镜 石鹏程[1] 郜志海[1] Liu Keyang;He Yan;Jiang Mingjing;Shi Pengcheng;Gao Zhihai(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou,Jiangsu 215011)

机构地区：[1]苏州科技大学土木工程学院,江苏苏州215011

出　　处：《非金属矿》2024年第3期49-51,55,共4页Non-Metallic Mines

基　　金：国家自然科学基金(51808369);长江科学院开放课题(CKWV20221020/KY)。

摘　　要：为揭示不同活化方式锂渣制备碱激发地聚合物可行性,对比分析了未活化、微波活化和热活化锂渣基地聚合物物理力学性能。结果表明,热活化和微波活化可以显著提高锂渣活性,增强锂渣基地聚合物放热速率和放热量,且热活化锂渣活性高于微波活化锂渣。掺2%NaOH和4%Na_(2)SiO_(3)时地聚物放热速率和放热量最佳,在Na_(2)SiO_(3)掺量相同的情况下,NaOH掺量过多会导致放热速率减慢,累计放热量降低。热活化和微波活化可以显著提高锂渣基地聚合物的抗压强度。掺加2%NaOH和4%Na_(2)SiO_(3)时,微波活化锂渣基地聚合物3 d抗压强度最高,较未活化锂渣基地聚合物增加9.3%。热活化锂渣基地聚合物28 d抗压强度最高,较未活化锂渣基地聚合物增加18.69%。掺加4%NaOH和4%Na_(2)SiO_(3)时,热活化锂渣基地聚合物3 d抗压强度最高,较未活化锂渣基地聚合物增加23.75%。微波活化锂渣基地聚合物28 d抗压强度最高,较未活化锂渣基地聚合物增加9.73%。热活化和微波活化活性增强,锂渣地聚合物碱激发反应生成的钙矾石、水化硅铝酸钙或硅铝酸钠((N)C-A-S-H)凝胶等含量高于原始锂渣地聚物,在Na_(2)SiO_(3)掺量相同的情况下,锂渣基地聚合物的活性随NaOH掺量的增加而降低。To reveal the feasibility of preparing alkali activated geogeopolymer using different activation methods of lithium slag,the hydration performances of non activated,microwave activated,and thermally activated lithium slag based geopolymer were compared and analyzed.The results show that thermal activation and microwave activation can significantly improve the activity of lithium slag,enhance the hydration heat and heat release of lithium slag based geopolymer,and the activity of thermal activated lithium slag is higher than that of microwave activated lithium slag.When 2%NaOH and 4%Na_(2)SiO_(3)are added,the hydration heat and heat release of the geopolymer are the best.When the content of Na_(2)SiO_(3)is the same,excessive NaOH addition will slow down the hydration heat release rate and reduce the accumulated heat.Thermal activation and microwave activation can significantly improve the compressive strength of lithium slag based geopolymer.When 2%NaOH and 4%Na_(2)SiO_(3)are added,the 3 d compressive strength of the microwave activated lithium slag based polymer is the highest,increasing by 9.3%compared to the non-activated lithium slag based polymer.The compressive strength of thermally activated lithium slag based geopolymer is the highest at 28 d,which is 18.69%higher than that of non-activated lithium slag based geopolymer.When 4%NaOH and 4%Na_(2)SiO_(3)are added,the 3 d compressive strength of thermally activated lithium slag based geopolymer is the highest,increasing by 23.75%compared to the non-activated lithium slag based geopolymer.The compressive strength of microwave activated lithium slag based polymer is the highest at 28 d,which is 9.73%higher than that of non-activated lithium slag based polymer.The thermal activation and microwave activation activities are enhanced.Ettringite and(N)C-A-S-H gel,produced through the alkaline activation reaction of lithium slag geopolymer,contain a greater amount than the initial lithium slag geopolymer.With the same Na_(2)SiO_(3)content,the activity of lithium slag

关 键 词：微波活化 热活化 碱激发 锂渣 地聚合物 

分 类 号：TQ172[化学工程—水泥工业] X705[化学工程—硅酸盐工业]