锂渣粉作为辅助胶凝材料在水泥基材料中的研究进展

Applying Lithium Slag Powders to Cement-based Materials as Supplementary Cementitious Component:An Overview

锂渣是生产锂盐过程中产生的工业废渣,其含有大量活性SiO_2和Al_2O_3,有作为辅助胶凝材料的应用潜力。从物理性质、化学成分与矿物组成、活性评价与活性激发等方面介绍了锂渣自身的物理化学特性和水化活性潜质。从力学性能、工作性、耐久性、水化反应与微结构四方面重点综述了锂渣粉对水泥基材料各方面性能的影响,并进行了理论分析与总结。最后指出锂渣粉用于水泥基材料需要在活性提高、高含量SO_3和多孔结构的改善及利用等方面加强研究。

Lithium slag is an industrial solid waste generated from the production of lithium salt, but it is rich in active SiO2 and Al2O3, and has great application potential as supplementary cementitious additives. This paper describes and summarizes the physical-chemical characteristics and potential hydration activity of lithium slag from the aspects of physical characteristics, chemical composition, mineral composition, activity evaluation, activity excitation, etc. It also analyzes and discusses the influences of lithium slag powders on the properties of cement-based materials from the perspectives of mechanical properties, workability, durability, hy- dration reaction and microstructure, and proposes the corresponding mechanisms. Finally, we suggest that several research directions need more attention, such as improving hydration activity, utilizing abundant SO3 component, optimizing porous structure and so forth.