ABSTRACT
In order to achieve the strategic goal of safeguarding national maritime rights and building maritime power, large-scale reclamation projects have been carried out by China on islands and reefs in the South China Sea. These projects are usually far away from the land, and it is extremely expensive to transport a large amount of engineering-filling materials from the land. So the calcareous sand widely distributed near the islands and reefs is usually used as the filling material. However, the friability of calcareous sands will lead to the characteristics of high compressibility and low bearing capacity of hydraulic reclamation soil foundations accumulated by coral calcareous sands. In order to explore the strength characteristics and solidified mechanism of calcareous sand under different curing agents, the unconfined compressive strength test was carried out on the solidified calcareous soil specimens under different conditions, and the influencing factors of its strength were studied from a microscopic perspective combined with the SEM test. This study provides a theoretical basis for future strength properties of solidified calcareous soils.
