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- 保温材料与建筑节能
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锂尾矿砂制备蒸压加气混凝土砌块的实验研究
作者：权宗刚，陈媛媛，马茸茸，刘蓉
（西安墙体材料研究设计院有限公司，陕西 西安 710061）
摘要：以锂尾矿砂为主要硅质原料制备蒸压加气混凝土砌块，研究了球磨时间、配方、静停养护时间及静停温度等对蒸压加气混凝土砌块干密度、抗压强度等性能的影响。研究表明，最优配方为：锂尾矿砂65%、生石灰13%、水泥17%、石膏5%、铝粉0.06%，水固比为0.55；最优球磨时间25 min，静停养护时间3 h，静停温度60 ℃，制得的砌块抗压强度可达到3.62 MPa，干密度为597 kg/m3。
关键词：锂尾矿砂；蒸压加气混凝土；配方；抗压强度；干密度
中图分类号：TU528.2 文献标识码：A 文章编号：1001-702X（2022）02-0120-04
Experimental study on preparation of autoclaved aerated concrete block from lithium tailings
QUAN Zonggang，CHEN Yuanyuan，MA Rongrong，LIU Rong
（Xi'an Walling Material Research and Design Institute Co. Ltd.，Xi'an 710061，China）
Abstract：Autoclaved aerated concrete blocks were prepared with lithium tailings as the main siliceous raw material in this study. The effects of ball-milling time，formula，static stop time and static stop temperature on the dry density and compressive strength of autoclaved aerated concrete blocks were studied. The results show that the optimum formula is：lithium tailings 65%，quicklime 13%，cement 17%，gypsum 5%，aluminum powder 0.06%，water-solid ratio 0.55；The optimum milling time is 25 min，the static stop curing time is 3 h. The static stop temperature is 60 ℃. The compressive strength of the obtained block is 3.62 MPa and the dry density is 597 kg/m3.
Key words：lithium tailings，autoclaved aerated concrete，formula，compressive strength，dry density