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<p>To investigate the freeze-thaw (F-T) properties of cement-stabilized soda residue soil (CSSRS), four conditions of dry (D), wet (W), capillary (C), and capillary loading (CL) were set. The evolution of volume, mass, water content, and durability index (DI) of CSSRS during the F-T cycles was analyzed, a strength degradation model was established, and the degradation mechanism was investigated. The results showed that DF-T exhibited small changes in volume, mass, and water content, with values of 0.34%, -0.10%, and 3.03%, respectively. In contrast, CF-T showed more significant changes in volume, mass, and water content, with values of 8.64%, 5.52%, and 8.15%, respectively. The degradation rates followed the order: CF-T &gt; CLF-T &gt; WF-T &gt; DF-T. During the initial cycle, the loss in DI could reach up to 60%, with the lowest being only 5.82%. The durability evolution under all four systems conformed to an exponential model (<i>R</i><sup>2 </sup>&gt; 0.8), influenced by coupled effects of cycle numbers and capillary water action. Mercury intrusion porosimetry analysis showed that CF-T exhibited the largest cumulative pore volume, with the big holes reaching a peak at the 5th F-T cycle, accounting for 8.72% of the total pore volume. In contrast, DF-T showed a smaller cumulative pore volume, with the porosity only reaching 12.09% after 10&#xa0;F-T cycles.</p>

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Investigating the Mechanical and Physical Properties of Cement Stabilized Soda Residue Soil in Different Freeze-Thaw Systems

  • 期刊论文

  • 发表日期：

    2026年3月4日

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  • Cheng Jiang,
  • Zimeng Zhou,
  • Minrui Zhao,
  • Bo Huang,
  • Bingxue Qi,
  • Xiaoqing Zhao,
  • Tianfeng Yang

摘要

To investigate the freeze-thaw (F-T) properties of cement-stabilized soda residue soil (CSSRS), four conditions of dry (D), wet (W), capillary (C), and capillary loading (CL) were set. The evolution of volume, mass, water content, and durability index (DI) of CSSRS during the F-T cycles was analyzed, a strength degradation model was established, and the degradation mechanism was investigated. The results showed that DF-T exhibited small changes in volume, mass, and water content, with values of 0.34%, -0.10%, and 3.03%, respectively. In contrast, CF-T showed more significant changes in volume, mass, and water content, with values of 8.64%, 5.52%, and 8.15%, respectively. The degradation rates followed the order: CF-T > CLF-T > WF-T > DF-T. During the initial cycle, the loss in DI could reach up to 60%, with the lowest being only 5.82%. The durability evolution under all four systems conformed to an exponential model (R2 > 0.8), influenced by coupled effects of cycle numbers and capillary water action. Mercury intrusion porosimetry analysis showed that CF-T exhibited the largest cumulative pore volume, with the big holes reaching a peak at the 5th F-T cycle, accounting for 8.72% of the total pore volume. In contrast, DF-T showed a smaller cumulative pore volume, with the porosity only reaching 12.09% after 10 F-T cycles.