锂渣对水性环氧砂浆性能的影响研究  

Study on effect of lithium slag on the performance of water-based epoxy mortar

作　　者：刘文杰 毛晟 朱群敏 康国旺 徐坤 王红英 曾兴华 LIU Wenjie;MAO Sheng;ZHU Qunmin;KANG Guowang;XU Kun;WANG Hongying;ZENG Xinghua(Jiangxi Institute of Building Materials Research and Design Co.Ltd.,Nanchang 330001,China)

机构地区：[1]江西省建材科研设计院有限公司,江西南昌330001

出　　处：《新型建筑材料》2024年第12期97-100,共4页New Building Materials

基　　金：江西省重点研发基金项目(20214BBG74002)。

摘　　要：为了探索锂渣资源化利用的新路径,测试分析了锂渣的物化性能,并研究了锂渣替代率对水性环氧砂浆凝结时间、力学性能、尺寸稳定性的影响。结果表明,锂渣的重金属浸出毒性、放射性符合相关标准要求,且机械研磨可以较好地激发锂渣的火山灰活性;当锂渣替代0~12%水泥时,随着锂渣替代率的增加,水性环氧砂浆的凝结时间不断延长,抗压、抗折及拉伸粘结强度均先提高后降低,收缩率先减小后增大。当锂渣替代率为6%时,水性环氧砂浆的抗压、抗折及拉伸粘结强度分别为58.8、14.3、1.96 MPa,收缩率为0.036%,其力学性能和尺寸稳定性改善最明显。In order to explore a new way of lithium slag resource utilization,this paper based on the analysis of physical and chemical properties of lithium slag,the effects of different amounts of lithium slag on the setting time,mechanical properties and dimensional stability of water-based epoxy mortar were studied.The results show that the heavy metal leaching toxicity and radioactivity of lithium slag meet the requirements of relevant national standards,and mechanical grinding can better stimulate the pozzolanic activity of lithium slag;when the lithium slag content replaces 0~12%of cement mass,with the increase of lithium slag content,the setting time of water-based epoxy mortar is increased,the compressive strength,flexural strength and tensile bond strength show a change trend of first increasing and then decreasing,while the shrinkage rate decreases first and then increases;when the lithium slag content is 6%,the compressive strength,flexural strength,tensile bond strength and shrinkage rate of water-based epoxy mortar respectively are 58.8 MPa,14.3 MPa,1.96 MPa and 0.036%,and its mechanical properties and dimensional stability are the most obvious improvement.

关 键 词：锂渣 物化性能 水性环氧砂浆 替代率 凝结时间 力学性能 尺寸稳定性 

分 类 号：TU578.12[建筑科学—建筑技术科学]