摘要
Abstract
This study focuses on the optimization of the performance of modified lithium slag as mortar fine aggregate,and the influence of the replacement rate of lithium slag on the hydration characteristics of cement is systematically discussed by XRD,thermogravimetric analysis and infrared spectroscopy.The results show that the hydration products are mainly C-S-H gel,Ca(OH)2 and unhydrated particles,and the activity of lithium slag can consume part of Ca(OH)2 and promote the formation of C-S-H.With the increase of the substitution rate,the Ca(OH)2 content decreases first and then increases,and the content is about 50%of the pure cement slurry at 7 and 28 days,and its 28 d compressive strength can reach63.0 MPa(substitution rate 20%).In addition,the strong water absorption of lithium slag can improve the workability of the slurry,but excessive incorporation will prolong the setting time.The research proves that reasonable use of modified lithium slag as fine aggregate can improve the resource utilization rate and optimize the performance of mortar,and provide a theoretical basis for the application of industrial waste slag with high value.关键词
改性锂渣/细骨料/水泥水化Key words
Modified lithium slag/Fine aggregate/Hydration分类
建筑与水利
