About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Evgeniy A. Vdovin, candidate of Engineering Sciences, assistant professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Pavel E. Bulanov, candidate of Engineering Sciences, assistant professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Viktor F. Stroganov, Doctor of Chemical Sciences, Professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it |
| Title of the article | Design of road pavements with layers of soil-cement modified with organosilicon |
| Abstract. | Problem statement. One of the current trends in increasing the efficiency of roads construction is the use of soil-cement in the structural layers of road pavements. However, the widespread use of soil-cement in road-climatic zones with seasonal changes, daily temperature changes and transition through 0° C is hampered by the need to achieve a high level of physical, mechanical and operational characteristics of soil-cement layers of road pavements. In the technology of soil strengthening, increasing the level of these indicators is possible by adding a technological stage for modifying soil-cement, including water repellents based on organosilicon compounds with bulky aliphatic radicals. The analysis of the sources made it possible to establish that systematic studies on the influence of the structure and volume of the aliphatic radical of organosilicon compounds on the efficiency of modification of road soil-cement have not been carried out. To ensure the possibility of designing road pavements with layers of modified soil-cement, it is also necessary to establish the dependencies of the influence of hydrophobization on the design characteristics of structural layers, the optimal values of which will allow them to be used in structural calculations. Results. Based on the identified dependencies of the influence of organosilicon compounds with aliphatic radicals of high molecular weight, which contribute to an increase in the levels of physical-mechanical and design characteristics of soil-cement, three design options for road pavements of the IV technical category of the lightweight type with layers of modified reinforced soils were designed and calculated. It has been established that hydrophobization of soil-cement with iso-butyl-, octyl- and dodecyltriethoxysilane provides an increase in compressive strength in the range from 34% to 83 %, tensile strength in bending from 33% to 131%, freeze-thaw resistance coefficient from 35% to 76% compared with unmodified compounds. It has been established that modification of soil-cement with the studied organosilicon compounds helps to increase the level of design characteristics of soil-cement layers of road pavements and, in particular, hydrophobization of reinforced soil with dodecyltriethoxysilane provides an increase in the elastic modulus: at 6 % Portland cement by 64 %; at 10 % – 53 %; at 14 % – 44 %. Conclusions: The possibility of designing road pavement structures with layers of soil-cement modified with organosilicon compounds with bulky aliphatic radicals is shown. This will improve the efficiency of road construction. The obtained results of design and calculations of road pavement options will contribute to expanding the regional raw material base and extending the service life of highways when using soil-cement modified with organosilicon compounds |
| Keywords. | construction of roads, design of road pavements, modified soil-cement, organosilicon compounds, design characteristics, modulus of elasticity |
| For citations: | Vdovin E.A., Bulanov P.E., Stroganov V.F. Design of road pavements with layers of soil-cement modified with organosilicon // News KSUAE, 2024, № 1(67), p. 207-216, DOI: 10.48612/NewsKSUAE/67.20, EDN: ZABBNC |
