Changes in the structure and properties of road bitumen during its thermal stabilization
https://doi.org/10.22227/1997-0935.2023.12.1926-1936
Abstract
Introduction. Petroleum bitumen is the main component of road surfaces, which play an important role in ensuring the safety and comfort of vehicle traffic. Over time, bitumen undergoes ageing, which leads to changes in its physical and chemical properties. Such changes cause a decrease in the quality of road surfaces, deterioration of their performance characteristics and reduction of durability. The analysis of research in the field of bitumen thermal stabilization, which is of great importance for optimization of technological processes at high temperatures, was carried out. The optimal composition of modified bitumen using stearic acid, industrial oil was determined.
Materials and methods. Bitumen undergoes serious changes during technological processes, during the transition from the bulk to the film state under the influence of high temperatures. Thus, thermal stability of bitumen is an important condition for preserving its quality at all stages of its life cycle. The issue of bitumen thermal stabilization with the use of stearic acid T-18 in combination with industrial oil I-20, which lead to increased resistance from external factors, is considered. To establish the degree of influence of modifying components on bitumen properties, a two-factor rotatable experiment with varying the amount of industrial oil and stearic acid additives, was performed.
Results. The compositions and properties of the obtained modified bitumen were studied. The analysis of the obtained results shows that the effect of stearic acid on bitumen penetration is about 6 times higher than the effect of industrial oil, while both components together have insignificant effect on the other studied properties of bitumen.
Conclusions. In order to further study thermal stability on the optimal versions of bitumen compositions, studies on mass retention of bitumen films at temperatures from 160 to 220 °C were performed. According to the obtained results, it was found that the effectiveness of stearic acid is manifested at higher temperatures and reaches values up to 25 %.
About the Authors
N. I. Shestakov
Moscow State University of Civil Engineering (National Research University) (MGSU)
Russian Federation
Russian Federation
Nikolay I. Shestakov — Candidate of Technical Sciences, Associate Professor of the Department of Urban Planning
26 Yaroslavskoe shosse, Moscow, 129337
Scopus: 57205223447
N. V. Khokhlova
Moscow Automobile and Road College named after A.A. Nikolaev
Russian Federation
Russian Federation
Natalia V. Khokhlova — postgraduate, lecturer of special disciplines
81 Bakuninskaya st., Moscow, 105082
Yu. E. Vasiliev
Moscow Automobile and Road State Technical University (MADI)
Russian Federation
Russian Federation
Yuri E. Vasiliev — Doctor of Technical Sciences, Associate Professor, Head of of the Department of Road Construction Materials
64 Leningradsky prospect, Moscow, 125319
ID RSCI: 285866, Scopus: 57205604432, ResearcherID: I-8197-2013
U. O. Menkina
Moscow Automobile and Road State Technical University (MADI)
Russian Federation
Russian Federation
Uliana O. Menkina — assistant, postgraduate student of the Department of Road Construction Materials
64 Leningradsky prospect, Moscow, 125319
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Review
For citations:
Shestakov N.I., Khokhlova N.V., Vasiliev Yu.E., Menkina U.O. Changes in the structure and properties of road bitumen during its thermal stabilization. Vestnik MGSU. 2023;18(12):1926-1936. (In Russ.) https://doi.org/10.22227/1997-0935.2023.12.1926-1936
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