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The modification of dispersive soils remains a prominent and challenging issue in the field of geotechnical engineering. Using lime, fly ash, and CaCl2 as benchmark materials, this study explores the potential of enzymeinduced calcite precipitation (EICP) technology to modify three kinds of dispersive soils. The modification effects of the four materials were systematically evaluated through crumb and pinhole tests. By linking the modification performance to curing time and material dosage, the study proposes a novel formula to compare the modification efficiency of the materials. To enhance practical applicability in engineering contexts, the study also investigates the impact of these materials on the mechanical properties of dispersive soils through unconfined compressive strength (UCS) tests. Furthermore, the modification mechanisms of the materials were compared using exchangeable sodium percentage (ESP) analysis, scanning electron microscopy (SEM), Energy Dispersive Spectrometer (EDS), and X-ray diffraction (XRD). The results indicate that both EICP technology and lime exhibit superior modification effects, effectively enhancing the resistance to water erosion and the mechanical properties of dispersive soils. Compared to lime, EICP technology demonstrates higher modification efficiency and greater environmental sustainability. Notably, low-concentration EICP solutions can effectively modify all three kinds of dispersive soils tested in this study.

来源平台：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING