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材料导报  2025, Vol. 39 Issue (2): 23120264-8    https://doi.org/10.11896/cldb.23120264
  无机非金属及其复合材料 |
废弃加气混凝土基胶凝材料协同锂渣制备充填料的研究
张凯帆1, 王晓军1,*, 王长龙2,3,*, 胡凯建1, 白云翼2, 陈辰4, 付兴帅2
1 江西理工大学资源与环境工程学院,江西 赣州 341000
2 河北工程大学土木工程学院河北省建筑工程低碳建造与韧性提升重点实验室,河北 邯郸 056038
3 武汉科技大学国家环境保护矿冶资源利用与污染控制重点实验室,武汉 430081
4 核工业井巷建设集团有限公司,浙江 湖州 313001
Study on the Preparation of Cemented Paste Backfill from Waste Aerated Concrete Cementitious Materials Combined with Lithium Slag
ZHANG Kaifan1, WANG Xiaojun1,*, WANG Changlong2,3,*, HU Kaijian1, BAI Yunyi2, CHEN Chen4, FU Xingshuai2
1 School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
2 Hebei Province Key Laboratory for Low-Carbon Construction and Resilience Enhancement of Construction Engineering, School of Civil Engineering, Hebei University of Engineering, Handan 056038, Hebei, China
3 State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Science and Technology, Wuhan 430081, China
4 Nuclear Industry Shaft Construction Group Co., Ltd., Huzhou 313001, Zhejiang, China
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摘要 针对工业固体废弃物堆存量大、资源化利用率低的问题,本工作尝试以废弃加气混凝土(WAC)、钢渣、矿渣、脱硫石膏、水泥为复合胶凝材料(CCMs),锂渣为细骨料,制备全尾砂绿色矿井充填料。采用粒度分析、力学性能测试、X射线衍射(XRD)及扫描电镜(SEM)等手段研究了WAC活性、充填料性能及CCMs水化机理。结果表明,粉磨40 min的WAC比表面积达到655 m2/kg,其28 d活性指数为81.43%。当CCMs配合比为m(WAC)∶m(钢渣)∶m(矿渣)∶m(脱硫石膏)∶m(水泥)=20∶15∶38∶7∶20、充填料中m(CCMs)∶m(锂渣)=1∶7、料浆质量浓度为83%、m(NaCl)∶m(CCMs)=0.01,充填料3、28 d抗压强度分别为1.7、3.0 MPa。充填料用CCMs的主要水化产物为C-S-H凝胶、Ca(OH)2、钙矾石(AFt)、Friedel盐。
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张凯帆
王晓军
王长龙
胡凯建
白云翼
陈辰
付兴帅
关键词:  废弃加气混凝土(WAC)  复合胶凝材料(CCMs)  锂渣  矿井充填料  水化产物    
Abstract: In order to solve the problems of large stock and low utilization rate of industrial solid wastes, this work made a sound attempt to prepare full-tailing green backfill using waste aerated concrete (WAC), steel slag (SS), slag (S), desulfurization gypsum (DG), cement (C) as composite cementitious materials (CCMs), and lithium slag (LS) as fine aggregates. It investigated the WAC's activity, backfill performance, and CCMs's hydration mechanism by means of particle size analysis, mechanical properties test, XRD, and SEM. The results showed that the WAC grinded for 40 min had a specific surface area of 655 m2/kg and a 28 d activity index of 81.43%. The backfill prepared by using the CCMs with mixing proportion of m(WAC)∶m(SS)∶m(S)∶m(DG)∶m(C)=20∶15∶38∶7∶20 and by adopting a m(CCMs)∶m(LS)=1∶7, the mass concentration of backfill slurry is 83%, and a m(NaCl)∶m(CCMs)=0.01 achieved 3 and 28 d compressive strengths of 1.7 and 3.0 MPa, respectively. It was revealed that the hydration products of the CCMs were mainly C-S-H gel, Ca(OH)2, ettringite (AFt) and Friedel salt.
Key words:  waste aerated concrete (WAC)    composite cementitious materials (CCMs)    lithium slag (LS)    mine backfill    hydration product
出版日期:  2025-01-25      发布日期:  2025-01-21
ZTFLH:  TD853.3  
基金资助: 国家重点研发计划(2021YFC1910605);河北省科技重大专项(21283804Z);固废资源化利用与节能国家重点实验室开放基金(SWR-2023-007);国家环境保护矿冶资源利用与污染控制重点实验室开放基金(HB202306)
通讯作者:  *王晓军,江西理工大学教授,博士研究生导师。2012年1月于北京科技大学获工程力学专业博士学位。主要从事岩石力学、采矿工程等领域的教学与科研工作。wangxiaojun@jxust.edu.cn;王长龙,河北工程大学教授,博士研究生导师。2014年1月于北京科技大学或矿业工程专业博士学位。长期从事固体废弃物高值化利用的理论及关键技术研究。baistuwong@139.com   
作者简介:  张凯帆,江西理工大学博士研究生,2021年6月于河北工程大学获结构工程专业工学硕士学位,从事新型建筑材料、矿物材料及复杂共生矿产资源综合利用研究。
引用本文:    
张凯帆, 王晓军, 王长龙, 胡凯建, 白云翼, 陈辰, 付兴帅. 废弃加气混凝土基胶凝材料协同锂渣制备充填料的研究[J]. 材料导报, 2025, 39(2): 23120264-8.
ZHANG Kaifan, WANG Xiaojun, WANG Changlong, HU Kaijian, BAI Yunyi, CHEN Chen, FU Xingshuai. Study on the Preparation of Cemented Paste Backfill from Waste Aerated Concrete Cementitious Materials Combined with Lithium Slag. Materials Reports, 2025, 39(2): 23120264-8.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.23120264  或          https://www.mater-rep.com/CN/Y2025/V39/I2/23120264
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