Dredged slurry generally exhibits high water content, high clay content, and low permeability, which frequently lead to drainage clogging and soil column formation during vacuum preloading. To address these issues, this study investigates composite curing agents based on cement and lime, incorporating industrial wastes (specifically steel slag and blast furnace slag) as partial replacements. Laboratory water bleeding tests and consolidation tests were performed, identifying an optimal total curing agent dosage of 2%. At this dosage, the modified slurry develops a semi-solidified skeletal structure capable of sustaining overburden loadings while preserving effective seepage channels. Notably, a composite formulation with an 80% industrial waste replacement ratio exhibited superior performance compared to pure cement, maintaining permeability 2–5 times higher than those of remolded slurry. Overall, this approach provides a low-carbon and cost-effective solution for large-scale land reclamation, with substantial economic and environmental benefits for soft ground improvement.
Liu et al. (Fri,) studied this question.