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<p>This study proposes an EICP method utilizing calcium lignosulfonate (CaLS) to treat sand-amended red clay, aiming to enhance cementation and radon reduction performance by optimizing seepage channels. The study demonstrates that sand particles expand seepage channels, facilitating the diffusion of the cementation solution. CaLS provides nucleation sites for calcium carbonate, inducing its enrichment at the soil–sand interfaces. The ESS-15 group exhibited the lowest radon diffusion coefficient, indicating superior radon barrier performance compared to the PS and ES groups.This effectively cements particles and fills pores, thereby blocking radon migration pathways. This method offers valuable insights for improving cover layers over uranium mill tailings impoundment.</p>

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Radon reduction effect of uranium mill tailings covering by EICP-improved red clay-sand mixture

  • 期刊论文

  • 发表日期：

    2025年12月12日

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  • Changshou Hong,
  • Chengyu Zhang,
  • Fubing Li,
  • Biqian Lu,
  • Zhien Zou,
  • Hong Wang,
  • Fuliang Jiang,
  • Qian Kang

摘要

This study proposes an EICP method utilizing calcium lignosulfonate (CaLS) to treat sand-amended red clay, aiming to enhance cementation and radon reduction performance by optimizing seepage channels. The study demonstrates that sand particles expand seepage channels, facilitating the diffusion of the cementation solution. CaLS provides nucleation sites for calcium carbonate, inducing its enrichment at the soil–sand interfaces. The ESS-15 group exhibited the lowest radon diffusion coefficient, indicating superior radon barrier performance compared to the PS and ES groups.This effectively cements particles and fills pores, thereby blocking radon migration pathways. This method offers valuable insights for improving cover layers over uranium mill tailings impoundment.