Traditional laboratory tests of cement-stabilized soil often overlook the in-situ conditions under which the material is formed. To investigate how different preparation parameters affect compressive strength

this study selected three types of parent soils from a construction site in Jiangxi Province. Key factors considered include the initial moisture state of the foundation soil before stabilization and a post-stabilization underwater curing environment at constant temperature. The complex characteristics of the parent soils were quantified using gravel content

while the water-cement ratio of the cement slurry was deconstructed into two independent variables: cement content and added water. Based on both engineering design codes and field construction data

a series of multi-factor combination tests were conducted to analyze the effects of these three preparation parameters on compressive strength. Results show that the optimal compressive strength

is achieved when the parent soil has an ideal moisture condition

with a gravel content of 100%

cement content of 25%

and added water at 16%.These findings provide valuable empirical references for mix design in cement-stabilized soil engineering.