<p>This study investigates the mass stabilization process for soft, highly organic soil with high moisture content, known for its inconsistent geotechnical properties that pose challenges in construction. The research employed varying percentages of ordinary Portland cement (10%, 15%, and 20%) as a binding agent to enhance the geotechnical properties of the soil through soil–cement mixing. Specimens were prepared under preloading (P) and non-preloading (NP) conditions and compared with field specimens. The study identified key factors influencing the cement-stabilization process, including binder percentages, organic content, and loading conditions during the curing process, and demonstrated a direct correlation among them. The inclusion of cement decreased porosity and organic content, which led to an increase in the compressive strength of the soil. The strength levels in preloaded samples were up to fifteen times higher than those in field conditions and roughly 1.5 to 2 times higher than those in non-preloaded conditions. Approximately 80% of the soil’s strength is attained within the initial seven days of the curing period. Furthermore, a multiple regression analysis was performed to establish predictive relationships among unconfined compressive strength (UCS), cement content, curing time, and porosity, which demonstrate strong correlations (R² ≈ 0.94 to 0.95) observed under loading and unloading conditions. These findings confirm the combined influence of these parameters on strength development. The research findings highlight the potential of cement stabilization to improve the strength and stability of highly organic soils, providing valuable insights into the relationship among cement content, soil properties, curing periods, and loading conditions.</p>