Comparative Research of the Adhesive Properties of Road Bitumen Modified With Additives of the “Adbit” Series

The paper presents the results of a comparative study of the influence of the cationic surface-active additive (surfactant) Adbit-R and the energy-saving additive Adbit-N on the adhesive properties of petroleum road bitumen in terms of adhesion of bitumen films to the surface of granite crushed stone grains and glass plates and the adhesion activity index. It is shown that among the studied additives, the surfactant Adbit-R provides road bitumen with the highest values of the studied indicators. In terms of adhesion of bitumen films to the surface of glass plates, the additive Adbit-R exceeds the energy-saving additive Adbit-N (at its concentration in the bitumen composition of 0.4% and 0.5% by mass), respectively, by 2.5 times and 2.0 times. By adding 0.4% and 0.5% of the energy-saving additive Adbit-N to the base bitumen, its adhesion to the surface of glass plates increases, respectively, by 3.0 and 3.7 times, compared to the original bitumen without the additive. It was found that the adhesion activity of bitumen increases with increasing concentration of the energy-saving additive Adbit-N in its composition