Exploring the Correlation Between Compressive Strength and Hydraulic Conductivity in Soft Soil with Metakaolin as a Stabilizing Agent: An Experimental Study

For strong foundations, especially in residential projects, the building industry needs effective soil quality improvement technologies. This study will evaluate whether metakaolin (MK) stabilizes clay soils. We treated certain soil samples with 0, 5, 10, and 15% metakaolin after examining their physical and chemical properties. They were lab-tested for durability and water transfer. The 15% metakaolin content decreased hydraulic conductivity by nearly 70% relative to unmodified soil. The metakaolin-hydrated calcium silicate gel (C-S-H gel) is more water-resistant due to its pore-filling and pore-shrinking actions. With 15% metakaolin, the treated soil samples had 75% greater unconfined compressive strength (UCS). Pozzolanic interaction between metakaolin and dirt caused this rise. The reaction produced more concentrated products, strengthening the substance. Adding metakaolin to clay soil increases erosion resistance and decreases water permeability. This may be a cost-effective way to improve clay soil’s mechanical and hydraulic qualities for building. This information may be used to plan and build clay soil embankments, dams, and retaining walls. We now have another instrument to preserve earth’s balance.