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金属矿山 ›› 2022, Vol. 51 ›› Issue (01): 71-75.

• 工业固废资源化利用新理论与新技术 • 上一篇    下一篇

极细高硅型铁尾矿制备超高性能混凝土研究

顾晓薇1徐建宇2贾泽藩2韩继宝2陈亮霄2阿如日2   

  1. 1.东北大学智慧水利与资源环境科技创新中心,辽宁 沈阳 110819;2.东北大学资源与土木工程学院,辽宁 沈阳 110819
  • 出版日期:2022-01-15 发布日期:2022-02-14
  • 基金资助:
    “十三五”国家重点研发计划项目(编号:2019YFC1907202);辽宁省重点研发计划项目(编号:2019JH2/10300051);辽宁省“兴辽英才计划”项目(编号:XLYC1905016);辽宁省重大科技专项(编号:2020JH1/10300005);东北大学博士生基本科研业务费项目(编号:N2001005);东北大学创新创业项目(编号:X202010145071)

The Study on Preparation of UltraHigh Performance Concrete Utilizing UltraFine Silicon Iron Tailings

GU Xiaowei1XU Jianyu2JIA Zefan2HAN Jibao2CHEN Liangxiao2A Ruri2   

  1. 1.Technology Innovation Center for Intelligent Water Resources and Environment,Northeastern University,Shenyang 110819,China;2.School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China
  • Online:2022-01-15 Published:2022-02-14

摘要: 基于骨料堆积理论和颗粒最紧密堆积理论,利用辽宁地区的高硅型铁尾矿砂替代天然河砂制备绿色新型超高性能混凝土(UHPC),并针对其浆体性能和力学性能开展了研究。结果表明,随着铁尾矿砂替代量的增大,UHPC浆体的流动性逐渐降低,含气量逐渐增大;UHPC试件的抗折强度随着掺量的增大有所上升,但7 d抗压强度随着铁尾矿砂掺量的增大而减小,而28 d龄期的抗压强度随着铁尾矿掺量的增大而增大,并在40%时达到最大值。

关键词: 高硅型铁尾矿, 最紧密堆积理论, 超高性能混凝土, 力学性能

Abstract: Based on the aggregate packing theory and the dense packing theory,a new type of green ultrahigh performance concrete (UHPC) was prepared by utilizing highsilicon iron tailing sand in Liaoning Province instead of natural river sand,and its paste properties and mechanical properties were studied.The results show that the workability of UHPC paste decreases and the air content increases with the increase of iron tailings content.The flexural strength of UHPC increases with the increase of iron tailings content,but the 7day compressive strength decreases with the increase of iron tailings content,while the 28day compressive strength increases with the increase of iron tailings content,and reaches the maximum at 40%.

Key words: 高硅型铁尾矿, 最紧密堆积理论, 超高性能混凝土, 力学性能