## 1 Introduction
### Relevance of Carbon Nanotubes for Property Improvement
According to [PERSON], [PERSON], [PERSON], and [PERSON] [14; 15; 16; 17], natural solid bitumen contains only 0.2-0.3 ppm of C60 fullerenes, with other fullerene types being virtually absent. In the emerging field of \"oil and gas nanotechnologies\", significant interest lies in the ability of primary nanostructures to form molecular aggregates (nanocolloids) in organic media such as plasticizers, natural oils, and bitumen. Researchers including [PERSON], [PERSON], and [PERSON] [13; 14; 15; 16; 17] have shown that depending on the structural type of bitumen, it may contain 10-25% asphaltenes. This positions petroleum road bitumen as a rich source of nanoscale objects. However, current bitumen production methods often fail to harness this potential effectively. Modern road construction materials, based on organic binders, are now evolving into multicomponent systems. These systems incorporate a variety of additives, including modifying agents, fillers, microfibers, and increasingly, nanoscale materials such as single- and multi-walled carbon nanotubes (MWCNTs) and carbon black (CB), among others [4]. These advancements highlight the untapped potential of integrating nanomaterials into bitumen-based systems for enhanced performance and durability. Nanotechnology techniques have shown promising applications in enhancing the properties of organic binders through the use of nanosystems, either as standalone modifiers or in combination with functional additives. For instance, [PERSON] and [PERSON] [18; 19] demonstrated that carbon nanoparticles, when added in concentrations of 0.5% to 1.5%, improve the elasticity modulus and resistance to rutting in bitumen binders. These nanoparticles also positively affect the aging performance of modified binders in thin-filmconditions (RTFO). However, the effectiveness of this modification is limited by inconsistent data on the uniform distribution of nanoparticles throughout the binder matrix. Further research by Chinese scientists [18; 19; 20; 21] highlights the advantages of using complex modifiers based on SBS and nanoparticles in asphalt concrete mixtures. For example, asphalt mixtures modified with ZnO-SBS nanocomposites exhibit enhanced thermal stability and crack resistance at low temperatures. The potential of nanoscale TiO\({}_{2}\) and SiO\({}_{2}\) particles for improving bitumen and polymer-modified binders is also recognized as a promising avenue for asphalt concrete production [20]. Carbon nanotubes (CNTs) offer significant benefits for strengthening polymer-modified binders (PMBs), primarily due to their capacity to transfer and distribute mechanical loads effectively. Studies confirm that incorporating CNTs into bitumen binders increases tensile and shear strength by 20-30%, thereby improving road pavement durability [22; 23]. Additionally, CNTs' exceptional thermophysical properties enhance the thermal resistance of modified PMBs [24; 25]. They facilitate even heat distribution within the material, preventing localized overheating and degradation. CNTs also slow down oxidation, reducing the aging rate of bitumen composites. Comparative studies indicate that PMBs with CNTs exhibit superior aging resistance compared to conventional bitumen binders [26]. The reviewed studies emphasize the transformative potential of nanotechnology in enhancing the mechanical, thermal, and aging properties of bitumen binders and asphalt mixtures. Practical research conducted by both domestic and international scientists has confirmed the feasibility of using nanoscale particles as effective nanomodifiers in organic binders [27; 28]. For instance, [PERSON] et al. [29] investigated the impact of carbon nanotubes (CNTs) on fatigue durability using indirect tensile fatigue tests. Their findings revealed that bitumen samples containing 0.5% CNTs exhibited the smallest increase in deformation under stress as temperatures rose. Specifically, deformation increased by 180% under a stress of 100 kPa at 5 \({}^{\circ}\)C compared to pure bitumen samples. Additionally, [PERSON] et al.