## 1 Introduction
Microscopic analysis revealed that the main reason for the strength improvement of stabilized soft soil was due to the formation of C-S-H, C-A-S-H, and N-A-S-H gels, as well as ettringite and zeolite hydration products from solid waste-based inorganic cementitious materials. [PERSON] et al. [18] found that SiO\({}_{2}\) and Al\({}_{2}\)O\({}_{3}\) in the soil could chemically react with a small amount of Ca(OH)\({}_{2}\) in the geopolymer to form a gel, which fills the space between the soil particles and connects them. Additionally, the alkali activator in the geopolymer undergoes substitution reactions with exchangeable alkali metal cations in the soil, resulting in the precipitation of alkali metal hydroxide near the surface of the soil particles. After the replacement reaction, the residual alkali activator reacts with SiO\({}_{2}\) and Al\({}_{2}\)O\({}_{3}\) in the soil to form a thin film on their surface, consisting mainly of sodium silicate and sodium aluminate. Extensive in-depth research has been recently carried out on the durability of soft soil solidified by solid waste-based cementitious materials. [PERSON] et al. [19] used alkali-activated slag instead of cement as a soil stabilizer, and the results showed that soft soil solidified with alkali-activated slag exhibited higher compressive strength, lower water permeability and chloride ion mobility coefficient, better sulfate resistance, and lower porosity. [PERSON] et al. [20] compared the durability of slag-based and cement-stabilized soil under sulfate attack, and the results showed that after full immersion in Na\({}_{2}\)SO\({}_{4}\) solution for 120 days, the surface of geopolymer-stabilized soil remained intact with almost no cracks. This is because the higher pH value and Na\({}^{+}\) content in the Na\({}_{2}\)SO\({}_{4}\) solution help maintain the uniformity of the internal pore structure in the geopolymer. Significant lateral and longitudinal cracks appeared on the surface of cement soil. The compressive strength of cement soil increased before 28 days of immersion but decreased sharply at later stages, while the compressive strength of geopolymer-stabilized soil decreased slowly and steadily with increasing immersion time. In summary, large amounts of marine soft soil are found in coastal areas as a result of long-term deposition by rivers. When traditional cement is used as the stabilization material for mixing piles, there are problems such as low early strength, slow strength growth, and poor resistance to seawater erosion. On the other hand, the high-value utilization of general industrial solid waste is an important opportunity to help the cement industry reduce carbon emissions. With the increasing promotion of solid waste-based cementitious materials by our state, steel slag, granulated blast furnace slag, desulfurization gypsum, fly ash, etc., are also used for soil stabilization. However, further verification of the mechanical properties, stability, and environmental impact of stabilized soil is urgently needed along with studying the corresponding mechanisms of action. This study aims to investigate the use of general industrial wastes, such as ground, granulated blast furnace slag (GGBS), dust ash (DA), and activated cinder powder (ACP), as well as additives like naphthalene sulfonate formaldehyde condensate (NS) and compound salt early strength agent (SA), to produce solid waste-based cementitious materials (SWC) for marine soft soil stabilization. The incorporation of GGBS and ACP promotes the generation of hydraulic cementitious products, thereby enhancing the structural bonding between soil particles. Meanwhile, the addition of DA encourages the production of filling hydraulic products, which fill the numerous pores present in the soft soil and convert the free water within the soil into crystalline water, thus reducing the soil's free water content.