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Volume 43 Issue S2
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ZHONG Yu-qing, CAI Guang-hua, WANG Jun-ge, WANG Zhong, SONG Long-guang. Strength and electrical conductivity characteristics of zinc contaminated soil carbonated/stabilized with GGBS-reactive MgO[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 221-224. DOI: 10.11779/CJGE2021S2052
Citation: ZHONG Yu-qing, CAI Guang-hua, WANG Jun-ge, WANG Zhong, SONG Long-guang. Strength and electrical conductivity characteristics of zinc contaminated soil carbonated/stabilized with GGBS-reactive MgO[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S2): 221-224. DOI: 10.11779/CJGE2021S2052
shu

Strength and electrical conductivity characteristics of zinc contaminated soil carbonated/stabilized with GGBS-reactive MgO

  • 1.

    College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China

  • 2.

    State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China

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  • Received Date: August 14, 2021
  • Available Online: December 05, 2022
    Graphical Abstract
    • Abstract
  • In this study, the compound binder of ground granulated blast furnace slag (GGBS)-reactive MgO is used for the carbonization/stabilization treatment of zinc (Zn)-contaminated soil. The unconfined compression and electrical conductivity tests on the carbonated/stabilized Zn-contaminated soil are conducted, and the uncarbonated Zn-contaminated soil after 28-day standard curing is used for comparison. The effects of Zn-ion concentration and binder mixing ratio on the unconfined compressive strength (qu) of the carbonated/stabilized soils and the conductivity of the pore fluid are investigated. The test results indicate that: (1) When the mixing ratio of curing agent is fixed, the qu of the carbonated Zn- contaminated soil first increases and then decreases with the increase of Zn ion concentration, while the conductivity increases. (2) When the content of Zn-ion concentration is fixed, the qu of the carbonated Zn-contaminated soil increases with the increase of reactive MgO content in the binder, but its conductivity decreases slightly. (3) The qu of the carbonated zinc contaminated soil is higher compared with that of the noncarbonated Zn- contaminated soil (28-day standard curing), but the conductivity is almost the same. This study will provide a new approach for the reuse of industrial wastes and carbon dioxide as well as the low-carbon treatment of Zn-contaminated soil, and be of important significance for accelerating the "carbon peak".
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    • References (11)
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