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In this research, carbon black (CB) particles were produced from the pyrolysis of crumb rubber (CR), and nano-carbon black (NCB) was obtained from CB particles. A commonly used performance grade (PG) binder (PG 64-22) was modified with different dosages of CB and NCB particles. After the basic laboratory bitumen test, the penetration index and stiffness modulus of the modified bitumen were calculated. The cohesion and adhesion work between different combinations of modified bitumen and aggregates (quartzite, granite, limestone, and sandstone) were measured in the absence and presence of water. Results showed that the penetration index and stiffness modulus of the bitumen modified with CB and NCB particles increased, while the static contact angle decreased. Limestone and quartzite showed the lowest work of adhesion, whereas sandstone demonstrated the highest work of adhesion in wet conditions. According to compatibility parameter (CP) data, limestone and quartzite had the most compatible aggregates-bitumen structure. With the addition of higher CB and NCB percentages, the CP value depicted an increasing trend. Finally, according to two new statistical models, a direct relationship existed between the work of cohesion and stiffness modulus of the modified bitumen.

The use of carbon black (CB) obtained from recycling petrochemical waste in bitumen has been reported. In this research, petrochemical waste was recycled and micro-nano CB was produced. Bitumen known as PG64-22 was modified with 3, 5, 7 and 10 wt% of CB and 1, 3, 5 and 7 wt% of nano CB (NCB). NCB particles were evaluated using the scanning electron microscopy and dynamic light scattering test. Stiffness modulus changes of modified bitumen were investigated using the Radovskiy and Teltayev model. Contact angles of three probe liquids, namely water, formamide, and glycerol, were measured on the surface of modified bitumen. The surface free energy parameters like Lifshitz-van der Waals force, polar component and the work of cohesion and adhesion were defined. The results showed that CB and NCB particles increased the penetration index and stiffness modulus of modified bitumen. The total SFE increased more than 50% with 10% CB particles and more than 80% with 7% NCB particles. In addition, the compatibility ratio of limestone and quartzite was revealed to be more than that of granite and sandstone. The results also demonstrated that the wettability of bitumen modified with NCB particles were higher than those modified with CB particles and showed more compatibility ratio values. Moreover, four energy ratios variations of modified bitumen with CB and NCB particles indicated moisture damage performance improvement in the bitumen and aggregate mixes. Also, the results of the indirect tensile strength (ITS) test showed that CB particles in the bitumen led to less reduction of adhesion between bitumen and aggregate compared to the control mixture, leading to an increase in the resistance to moisture damage of asphalt mixture.