Soil stabilization, achieved through the use of binders such as cement, lime, or ashes, along with special additives, significantly enhances the durability of substructure construction and earthen road surfaces. The article presents the results of compression strength tests on clayey rubble samples. These samples were stabilized with a hydraulic binder (specifically, cement 32.5 R) at concentrations of 5%, 7%, and 10%, and with the use of special additives that significantly strengthen the structure of the stabilized soil. Additives to the cement, such as the ion-exchangeable one marked K1, the chemical one marked EN1, and the polymer NC, play a role in strengthening the bond between the soil and the binder at a molecular level. This results in a more durable and resistant structure of the soil-concrete mixture. The results obtained were compared with those for soil stabilized with cement alone. All results were evaluated based on the current standard.