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Zeolite-based soil stabilization: A review
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DOI：10.1016/j.jrmge.2025.06.039.png)
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Abstract
En 中文
Over the past decade, zeolites have received considerable attention for their capacity to address environmental and geotechnical challenges, owing to their distinctive porous structure and ion-exchange properties. This makes them particularly promising for the development of new low-carbon cementitious binders for soil stabilization. This paper presents a comprehensive investigation into the diverse applications of zeolites, emphasizing their roles in soil improvement and environmental remediation. A systematic review of the current literature thoroughly explores how zeolites—particularly the natural zeolite clinoptilolite—contribute to soil stabilization and heavy metal removal from contaminated soils. The study highlights the significant impact of zeolites on the structural integrity and geotechnical properties of soil mixtures, demonstrating their exceptional potential as a sustainable solution to geo-structural instability and soil contamination challenges. A wide range of geotechnical properties of zeolite-improved soils—including consistency, compaction, swelling, dispersivity, permeability, strength, stiffness, compressibility, and durability, as well as their microstructural and environmental attributes—are critically evaluated and discussed. Investigations indicate that zeolite-treated soils exhibit up to a 16.7-fold increase in unconfined compressive strength (UCS), up to a 100% reduction in swelling potential, and an adsorption efficiency exceeding 90% for heavy metals, notably Pb2+ and Zn2+. Furthermore, permeability values in zeolite-treated soils are notably low, demonstrating their effectiveness in hydraulic barrier applications. Finally, the diverse geotechnical applications, challenges, and potential future research directions for utilizing zeolite in civil engineering infrastructure projects are explored. The findings of this paper provide a foundation for future investigations aimed at broadening the applications of zeolites, developing novel zeolite composites, and exploring cost-effective production methods.
Keywords:
Zeolite
Soil stabilization
Microstructural behavior
Strength
stiffness
Geotechnical properties
Environmental remediation
Heavy metal removal
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