The ballast layer is one of the main components from the conventional rail track structure that experienced the greatest load in resisting the repetitive loads from train vehicle traffic. This results in a relatively short service life of ballast layer and impact on the high maintenance costs of the rail track structure. Therefore, further action need in the form of research on technological innovation in ballast material as added material to enhance the quality of the ballast layer. The asphalt addition as a binder between on ballast material expected be alternative to increase the durability, service life and to reduce the maintenance cost of the rail track. The purpose of this research is to analyze the characteristics of vertical deformation, elastic modulus, and durability due to the addition of asphalt in the balllast layer. The method used in this research was the compressive strength test method with the test sample modeled into a ballast box made of steel with the dimension 400mm x 300mm x 200mm. There are three specimens, which are ballast without modification (sample I), ballast with 2% asphalt (sample II), and ballast with 3% asphalt (sample III). The results of the research that has been done on 3 sample showed that the most significant durability occurred on the sample 3 with the smallest damage value of 39,4 grams. The smallest vertical deformation can be found on the sample I by 4 mm at the load of 310 kPa. Moreover, the most significant elastic modulus value occurred on the sample I by 25,38 MPa.