摘要
为提高锂渣在水泥基材料中的利用率,对比了不同微波功率对锂渣火山灰活性的影响。结果表明,微波处理促进了锂渣中的石膏与锂辉石等矿物相的分解,提高了锂渣的火山灰活性,致使锂渣-水泥复合体系形成更多的水化产物。随着微波功率的增加,锂渣复合水泥水化第二放热峰提前出现,且峰值增加,水化放热总量也显著增加。相较原始锂渣,采用40%功率微波激活后的锂渣复合水泥胶砂3 d、7 d及28 d的抗压强度分别增加15.2%、5.0%、13.1%。
In order to improve the utilization rate of lithium slag in cement-based materials,effects of different microwave power on pozzolanic activity of lithium slag were investigated.The results showed that microwave treatment promoted the decomposition of gypsum and spodumene in the lithium slag improved the pozzolanic activity of the lithium slag,and more hydration products were formed in the lithium slag-cement composite system.With the increase of microwave power,the second heat release peak of lithium slag composite cement hydration appeared in advance,and the peak value increased,the total heat release from hydration also increased significantly.Compared with cement mortar incorporated with raw lithium slag,the compressive strength of lithium slag composite cement mortar activated by 40%power microwave increased by 15.2%,5.0%and 13.1%at 3 d,7 d and 28 d,respectively.
作者
李萌
何燕
高志扬
郜志海
Li Meng;He Yan;Gao Zhiyang;Gao Zhihai(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou,Jiangsu 215011;Yangtze River Research Institute,Wuhan,Hubei 430010)
出处
《非金属矿》
2024年第2期89-93,共5页
Non-Metallic Mines
基金
国家自然科学基金(51808369,51890911)
长江科学院开放研究基金资助项目(CKWV20221020/KY)
江苏省研究生科研与实践创新计划项目(SJCX22_1577,SJCX23_1722)。
关键词
水泥
锂渣
水化性能
微波激活
抗压强度
cement
lithium slag
hydration performance
microwave activation
compressive strength
