A stabilization or electro-cementation method of calcareous sand is provided. Calcareous sand, SiO.sub.2 nanoparticles, AI.sub.2O.sub.3 powder and NaCl solution are first mixed. The mixture is treated by passing a DC current through the mixture in which the applied voltage is sufficient as a decomposition voltage of the mixture to cause electrolysis so that pozzolanic reactions can take place within the mixture. Pozzolanic reactions continue to take place beyond the electrokinetic (EK) treatment time. In one embodiment, the post EK treatment time required to achieve hardening caused by pozzolanic reactions can last for at least 60 days. Once the treatment is considered satisfactory, the treated mixture can be tested or loaded. The compressive and shear strengths of the treated sand are significantly improved. The nature of the treated soil is changed from a granular material into a rock. The method has a low carbon footprint compared to other stabilization methods.

The present application provides a precise ion implantation type modified geopolymer and an efficient preparation method thereof, wherein the precise ion implantation type modified geopolymer comprise: a geopolymer source material with a specific size, which implanted by Si and Al ions with a designated dose by an ion implanter. The geopolymer source material consists of a mixture of solid waste, alkali activator, and water.