Abstract : This study examines the feasibility of using recycled tire chips in replacing the percentage of subgrade soils in the construction of roads and airport projects. To determine the impact of waste tire rubber inclusion and cement stabilization on the geotechnical properties of loose subgrade sand soils, a laboratory testing program was conducted. As a chemical stabilizer to enhance the soil's strength properties, 10% of the cement was added to the mix. The cemented-sand mixtures were then treated with varying amounts of 0.5 to 2 cm-sized rubber tire chips. A modified Proctor test, an unconfined compressive strength test, and a California bearing ratio test were all performed in the lab. All samples of the cemented-sand-tire-chips mixes performed 1, 3, and 7 days of curing. The results of experimental results indicate that increasing the cement concentration significantly enhances the soil's strength, bearing resistance, and brittleness behavior. Additionally, the findings showed that when tire chips replacement increases, dry density, unconfined compressive strength, stiffness, and soil bearing resistance all decrease. The geotechnical characteristics of cemented-sand soil combinations, however, are improved by adding 5 to 10% tire chips, compared to those of poor natural subgrade soils. As a result, adding cement and tire chips to loose subgrade soils may lower the cost of stabilizing the process and lessen the environmental impact of trash tire scrap.