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Volume 43 Issue S2
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WAN Jia-lei, FENG Ya-song, LI Shuang-jie, ZHOU Shi-ji, WANG Shui, DU Yan-jun. Leaching, physical and mechanical characteristics of nickel-zinc-contaminated clay solidified/stabilized by a novel steel slag-based binder subjected to wetting-drying cycles[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 213-216. DOI: 10.11779/CJGE2021S2050
Citation: WAN Jia-lei, FENG Ya-song, LI Shuang-jie, ZHOU Shi-ji, WANG Shui, DU Yan-jun. Leaching, physical and mechanical characteristics of nickel-zinc-contaminated clay solidified/stabilized by a novel steel slag-based binder subjected to wetting-drying cycles[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 213-216. DOI: 10.11779/CJGE2021S2050
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Leaching, physical and mechanical characteristics of nickel-zinc-contaminated clay solidified/stabilized by a novel steel slag-based binder subjected to wetting-drying cycles

  • 1.

    Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China

  • 2.

    Jiangsu Provincial Academy of Environmental Science, Nanjing 210036, China

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  • Received Date: August 14, 2021
  • Available Online: December 05, 2022
    Graphical Abstract
    • Abstract
  • A novel steel slag-based binder is used to solidify/stabilize the contaminated clay with nickel (Ni) and zinc (Zn). The effects of wetting-drying cycles on the mass loss rate, unconfined strength and leaching characteristics of the treated soil are studied by modified wetting-drying cycle tests. The results demonstrate that with the increase of wetting-drying cycles, the change rate of leaching concentration of heavy metals and the relative cumulative mass loss rate of the treated soil both decrease at first and then increase with the lowest values are -3.23%, -4.29% and -1.06%, respectively, while the change rate of unconfined compressive strength of the treated soil exhibits an opposite trend with the highest values is 27.25%. When the deterioration of the treated soil happens, the number of the critical wetting-drying cycles corresponding to the change rate of the leaching concentration of heavy metals is 6, while the number corresponding to the change rate of the relative cumulative mass loss and unconfined compressive strength is 18.
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    • References (8)
  • [1]
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    ZHA Fu-sheng, LIU Jing-jing, XU Long, et al. Cyclic wetting and drying tests on heavy metal contaminated soils solidified/stabilized by cement[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(7): 1246-1252. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201307011.htm
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    FENG Ya-song. Solidification/Stabilization of Clay Soil Contaminated with Nickel and Zinc: Sustainable Binder Development and Performance Evaluation[D]. Nanjing: Southeast University, 2021. (in Chinese)
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