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<p>This study presents a modified two-phase relationship model to effectively predict changes in soil structure and consolidation behavior when superabsorbent polymer (SAP) is introduced. Laboratory experiments are conducted to examine the effects of SAP on water retention, compressibility, and permeability under different conditions. The findings indicate that a 0.6% SAP dosage forms a gel-like matrix that enhances soil structure, increases drainage efficiency, and improves consolidation performance in high-water-content dredged clay. Key factors influencing these changes, such as SAP dosage, initial water content, and particle interactions, are analyzed. The traditional phase relationship model is modified to incorporate the unique properties of SAP, revealing how it alters the distribution and connectivity of solid, liquid, and void phases within the soil. This refined model provides improved accuracy in predicting soil behavior under varying initial water contents and consolidation stresses, addressing limitations in conventional methods. Additionally, the study highlights the nonlinear relationship between water absorption and volume expansion of SAP, emphasizing its role in enhancing pore structure and soil stability. Overall, this study provides a reliable predictive framework for SAP-treated soils and offers valuable guidance for sustainable sediment treatment in geotechnical engineering applications.</p>

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Optimizing dredged clay treatment with superabsorbent polymer: a new phase relationship approach and geotechnical implications

  • 期刊论文

  • 发表日期：

    2025年7月29日

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  • Yupeng Cao,
  • Wei Liu,
  • Mingdong Li,
  • Yufan Song,
  • Nuo Xu,
  • Jie Yin

摘要

This study presents a modified two-phase relationship model to effectively predict changes in soil structure and consolidation behavior when superabsorbent polymer (SAP) is introduced. Laboratory experiments are conducted to examine the effects of SAP on water retention, compressibility, and permeability under different conditions. The findings indicate that a 0.6% SAP dosage forms a gel-like matrix that enhances soil structure, increases drainage efficiency, and improves consolidation performance in high-water-content dredged clay. Key factors influencing these changes, such as SAP dosage, initial water content, and particle interactions, are analyzed. The traditional phase relationship model is modified to incorporate the unique properties of SAP, revealing how it alters the distribution and connectivity of solid, liquid, and void phases within the soil. This refined model provides improved accuracy in predicting soil behavior under varying initial water contents and consolidation stresses, addressing limitations in conventional methods. Additionally, the study highlights the nonlinear relationship between water absorption and volume expansion of SAP, emphasizing its role in enhancing pore structure and soil stability. Overall, this study provides a reliable predictive framework for SAP-treated soils and offers valuable guidance for sustainable sediment treatment in geotechnical engineering applications.