Effect of Mechanical Activation on Pozzolanic Activity of Iron Tailings

被引：0
|
作者：
Gu X.-W. [1 ]
Yin S.-Q. [1 ]
Zhang W.-F. [1 ]
Li X.-H. [1 ]
机构：
[1] School of Resources & Civil Engineering, Northeastern University, Shenyang
来源：
Dongbei Daxue Xuebao/Journal of Northeastern University | 2022年 / 43卷 / 08期
关键词：
activity index; hydration product; iron tailing; micro-grading; pore structure;
D O I：
10.12068/j.issn.1005-3026.2022.08.014
中图分类号：
学科分类号：
摘要：
In order to improve the pozzolanic activity of iron tailings, the effects of different activation time and ball to material ratios on the activity index of iron tailing mortar were studied by means of PSD, XRD and SEM. The test results showed that the mechanically activated iron tailings have potential cementitious property, and its activity index is greatly affected by the activation time and ball to material ratio. The activity index of iron tailings with mechanical activation for 40 min, ball to material ratio of 9:4 and mechanical activation for 30 min, and ball to material ratio of 2: 1 can meet the application requirements of pozzolanic mixtures. The cementitious property of mechanically activated iron tailings is greater than its micro-filling effect, and the micro-grading uniformity of activated iron tailings is less than that of non-activated iron tailings. The addition of iron tailings changes the alkalinity of cement systems and the pore structure of hydration products, and makes more CO2 enter the mortar, resulting in more carbonate products. © 2022 Northeastern University. All rights reserved.
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页码：1168 / 1175and1200
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共 22 条
  • [1] Liu Wen-bo, Yao Hua-yan, Wang Jing-feng, Et al., Current situation of comprehensive utilization of iron tailings [J], Materials Reports, 34, pp. 268-270, (2020)
  • [2] Xing-dong Lyu, Zhan-ao Liu, Zhi-gang Zhu, Et al., Study of the progress of tailings comprehensive utilization of raw materials in cement and concrete [J], Materials Reports, 32, sup2, pp. 452-456, (2018)
  • [3] Qin Fu-rong, Shi-ying Zhang, Yun-sheng Xia, Et al., Investigation of dominant plants and analysis of ecological restorationpotential in Lailishan tin tailings [J], Environmental Science, 42, 8, pp. 3963-3970, (2021)
  • [4] Yang Sheng-xiang, Cao Jian-bing, Li Feng-mei, Et al., Ecological effects of species siversity on plant growth and physical-chemical properties in a Pb-Zn mine tailings [J], Environmental Science, 42, 8, pp. 3953-3962, (2021)
  • [5] Cheng Y H, Huang F, Qi S S, Et al., Durability of concrete incorporated with siliceous iron tailings [J], Construction and Building Materials, 242, pp. 118147-118156, (2020)
  • [6] Cheng Y H, Huang F, Li W C, Et al., Test research on the effects of mechanochemically activated iron tailings on the compressive strength of concrete [J], Construction and Building Materials, 118, pp. 164-170, (2016)
  • [7] Qiang Zheng, Wen-yuan Wu, Xue Bian, Experimental study on one-step roasting of Bayan Obo tailings [J], Journal of Northeastern University (Natural Science ), 39, 2, pp. 205-210, (2018)
  • [8] Yang Ying-chun, Mao Yu-guang, Influence of iron tailing powder of different fineness on properties of cement-based material[J], Journal of Xi' an University of Architecture & Technology (Natural Science Edition), 52, 2, pp. 241-247, (2020)
  • [9] Ren Feng-yu, Yang Liu, He Rong-xing, Et al., Flow-through features of tailings in subsidence area under ore drawing conditions [J], Journal of Northeastern University (Natural Science), 41, 6, pp. 858-862, (2020)
  • [10] Cheng Yun-hong, Huang Fei, Qi Shan-shan, Et al., Effects of high-silicon iron tailings on carbonation and sulphate corrosion resistance of concrete, Journal of Northeastern University (Natural Science), 40, 1, pp. 121-125, (2019)
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