Transformation of oil dispersed systems during operation

Abstract: Using the example of oil road bitumen grades BND 100/130, BND 130/200 and BND 70/100, this article studies the transformation of oil dispersed systems under various logistic schemes of operation. This research focuses on the influence of the conditions for storing road bitumens of different grades on their physical and mechanical properties and group hydrocarbon composition during transportation from the manufacturer to the consumer. The results show that a change in the physical and mechanical properties of road bitumens during high-temperature storage is related to the changes in the group hydrocarbon composition due to the hydrocarbons autooxidation and destabilization of the colloidal structure of dispersal systems. The conditions for storing bitumen with a minimum change in its quality indicators have been determined. It has been established that storage of bitumen under atmospheric conditions allows preserving its original properties without significant changes. There is evidence that nitrogen purging significantly reduces the effect of homolytic processes leading to the transformation of oil dispersed systems during further transportation from the manufacturer to the consumer. Experimental data confirm that of all basic physical and mechanical properties of bitumen, “the depth of penetration of needle” is the most sensitive index, while the “softening temperature” index, frequently used for quality control of bitumen, is inertial. Determining the change in penetration, depending on the duration of storing bitumen, has required formulating a special equation. It has been established that when storing road bitumen at a temperature of 180 ºС, for each hour the index of the penetration depth of the needle at 25 º decreases by 0.8 units. Organizational and technical measures have been determined to ensure the stability of the road bitumen quality during manufacture, storage and transportation to consumers.

1. Polyakova VI. On the question of structure formation of road binders. Dorogi i mosty. 2016;2:233–264. (In Russian)

2. Unger FG, Andreeva LN. Fundamental aspects of oil chemistry. Nature of resins and asphaltenes. Novosibirsk: Nauka; 1995. 188 p. (In Russian)

3. Kolbanovskaya AS, Mikhailov VV. Road bitumen. Moscow: Transport; 1973. 264 p. (In Russian)

4. Gureev AA. Oil binding materials. Moscow: Nedra; 2018. 242 p. (In Russian)

5. Pakter MK, Bratchun VI, Stukalov AA, Bespalov VL, Dolya AG. Laws of technology obsolescence oil road bitumen and asphalt mixes. Sovremennoe promyshlennoe i grazhdanskoe stroitel'stvo. Modern Industrial and Civil Construction. 2014;10(4):225–235. (In Russian)

6. Chang H-L, Wong GK, Lin J-R, Yen TF. Chapter 9. Electron spin resonance study of bituminous substances and asphaltenes. Developments in Petroleum Science. 2000;40(part B):229–280. https://doi.org/10.1016/S0376-7361(09)70280-8

7. Petrova LM, Zaidullin IM, Abbakumova NA, Khusnutdinov ISh, Kashapova RR. Informative parameters of the composition and structure of bitumen to assess their resistance to ageing. Vestnik Kazanskogo tekhnologicheskogo universiteta = Bulletin of Kazan Technological University. 2011;10: 131–134. (In Russian)

8. Pakter MK, Bratchun VI, Narygnaya ON, Stukalov AA, Bespalov VL. Study of the colloiddispersed structure of road bitumen under thermal oxidative aging. Sovremennoe promyshlennoe i grazhdanskoe stroitel'stvo = Modern Industrial and Civil Construction. 2018;14(3):133–141. (In Russian)

9. Pechenyi BG, Kurbatov VL, Losev VP. On the mechanism of bitumen aging and methods of their testing. Universitetskaya nauka. 2019;2;28–32. (In Russian)

10. Rybachuk NA. Aging of asphalt binder. Vestnik Irkutskogo gosudarstvennogo tekhnicheskogo universiteta = Proceedings of Irkutsk State Technical University. 2015;2;120–125. (In Russian)

11. Iliopolov SK, Nikulin UY, Saenko SS. Bitumen ageing in operating boiler of asphalt concrete mixing plant. Dorogi i mosty. 2009;21:208–220. (In Russian)

12. Bratchun VI, Pakter MK, Stukalov AA. Predict changes in the group composition for technological aging road bitumen. Vestnik Donbasskoi Natsional'noi Akademii Stroitel'stva i Arkhitektury = Bulletin of the Donbass National Academy of Civil Engineering and Architecture. 2015;1:12–20. (In Russian)

13. Abdullin AI, Idrisov MR, Emel'yanycheva EA, Abdullina VKh. Changes in the viscous properties of petroleum bitumen in the aging process. Vestnik Tekhnologicheskogo Universiteta = Bulletin the Technological University. 2019;22(10):25–29. (In Russian)

14. Gureev AA, Chan Nyat Tan Nyat Tan. Thermal-oxidative stability of road bitumen. Neftepererabotka i neftekhimiya. 2010;4:9–12. (In Russian)

15. Vasil'ev VV, Nikitin EE, Karpov KA, Salamatova EV, Potekhin VM, Alekseev OV. Investigation of the process of tar oxidation in West Siberian oils by gasometric method. Neftepererabotka i neftekhimiya. 2002;8:13–16. (In Russian)

16. Salamatova EV, Vasil'ev VV, Potekhin VM. Determination of auto-oxidation rates of some hydrocarbons and oil residues. Neftepererabotka i neftekhimiya. 2004;8:16–22. (In Russian)

17. Galdina VD. Kinetics of thermal-oxidative ageing of bitumens of the various nature. Vestnik Tomskogo gosudarstvennogo universiteta = Tomsk State University Journal. 2011;3:133–139. (In Russian)

18. Hofko B, Cannone Falchetto A, Grenfell J, Huber L, Lu X, Porot L, et al. Effect of short-term ageing temperature on bitumen properties. Road Materials and Pavement Design. 2017;18(3):108–117. https://doi.org/10.1080/14680629.2017.1304268

19. Hofko B, Maschauer D, Steiner D, Mirwald J, Grothe H. Bitumen ageing – Impact of reactive oxygen species. Case Studies in Construction Materials. 2020;13:e00390. https://doi.org/10.1016/j.cscm.2020.e00390

20. Tarsi G, Varveri A, Lantieri C, Scarpas T, Sangiorgi C. Effects of different ageing methods on the chemical and rheological properties of bitumen. Journal of Materials in Civil Engineering. 2018;30(3). https://doi.org/10.1061/(ASCE)MT.1943-5533.0002206