Research Review of Reaction Mechanism and Mechanical Properties of Chemically Solidified Silt

Dredged silt, characterized by high moisture content, low shear strength, and poor permeability, presents significant challenges for direct engineering application, leading to excessive land occupation and unsustainable resource management. To address these issues, solidification-lightweight composite technology has emerged as a promising approach to transform dredged silt into sustainable geo-materials. This review systematically evaluates international research progress on silt solidification, focusing on (1) the chemical reaction mechanisms of varied solidification agents, (2) the quantitative effects of key factors (e.g., agent dosage, curing time, and organic content) on the mechanical properties (unconfined compressive strength and shear strength) of treated silt, and (3) a critical discussion on technological limitations and future research directions. The findings provide insights for optimizing treatment protocols and advancing large-scale applications.