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<p>Rapid urban industrialization has significantly increased the generation of industrial solid waste, posing substantial challenges for its effective and sustainable disposal. This study utilizes industrial waste combined with construction waste (CW) to solidify dredged sediment (DS), resulting in the creation of a novel solid waste-based landfill cover material (GH). After 20 dry-wet cycles, GH retained favorable mechanical performance, with compressive strength ranging from 4.31 to 6.83&#xa0;MPa, volumetric shrinkage between 1.56% and 2.96%, and a stabilized permeability coefficient of 8.74 × 10<sup>− 8</sup>−1.412 × 10<sup>− 7</sup> cm/s. Furthermore, the GH material functions as an impermeable layer within landfill cover systems, which were evaluated through a field-scale model test. The cover system at a depth of 40–60&#xa0;cm exhibited the most substantial recharge from rainfall, with volumetric water contents were 17.97−51.19%. The GH at the bottom of the model box did not achieve saturation at any point during the experiment. A comprehensive characterization of the GH was conducted using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy coupled with energy dispersive spectroscopy (SEM-EDS). The solidification mechanisms of industrial solid waste and municipal construction waste in lake sediment were elucidated.</p>

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A Gelling Material Derived from Industrial Solid Waste and Dredged Sediment: Mechanical Characterization, Microscopic Analysis, and Potential Applications

  • 期刊论文

  • 发表日期：

    2025年7月23日

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  • Qiming Luo,
  • Mengyi Liu,
  • Meng Zang,
  • Yiqie Dong,
  • Xinghua He,
  • Guanghui Shao,
  • Haijun Lu

摘要

Rapid urban industrialization has significantly increased the generation of industrial solid waste, posing substantial challenges for its effective and sustainable disposal. This study utilizes industrial waste combined with construction waste (CW) to solidify dredged sediment (DS), resulting in the creation of a novel solid waste-based landfill cover material (GH). After 20 dry-wet cycles, GH retained favorable mechanical performance, with compressive strength ranging from 4.31 to 6.83 MPa, volumetric shrinkage between 1.56% and 2.96%, and a stabilized permeability coefficient of 8.74 × 10− 8−1.412 × 10− 7 cm/s. Furthermore, the GH material functions as an impermeable layer within landfill cover systems, which were evaluated through a field-scale model test. The cover system at a depth of 40–60 cm exhibited the most substantial recharge from rainfall, with volumetric water contents were 17.97−51.19%. The GH at the bottom of the model box did not achieve saturation at any point during the experiment. A comprehensive characterization of the GH was conducted using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy coupled with energy dispersive spectroscopy (SEM-EDS). The solidification mechanisms of industrial solid waste and municipal construction waste in lake sediment were elucidated.