Non-traditional stabilizers are widely used in the application of treating weak soils. In recent years, the application of nanotechnology in engineering has increased. Nano-silica (NS) has emerged in soil stabilization. The application of nanotechnology can enhance soil properties. A comparative study of hydromechanical properties such as Compressive strength, shrinkage and consolidation tests were performed on mudstone soil from the Kaoushing region, stabilized with Hydrophilic Nano-silica (Hpi-NS) and Hydrophobic Nano-silica (Hpo-NS). This study examined the effect of NS-Hpi and NS-Hpo on the geotechnical properties of low plasticity (CL) mudstone soil (using). Unconfined Compressive Strength (UCS) was analyzed to infer the degree of strength enhancements with different percentages of Nano-silica (0.3%, 0.6%, 0.9%, 1.2%) during the 7D, 14D, and 28D curing period. The experimental results show a significant increase in strength from the UCS test. One-dimensional consolidation is carried out to study mudstone's compressibility properties before and after stabilization. The microstructural analysis using Scanning Electron Microscopy (SEM) illustrates the stabilization effects in the soil. From the test results, soil treated with Nano-silica improved the properties of the earth in terms of strength.

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