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. | Denis S. Smirnov, candidate of technical sciences, associate professor, Kazan State University of Architecture and Engineering, Russian Federation. Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kamilya R. Belaeva, laboratory assistant, Kazan State University of Architecture and Engineering, Russian Federation. Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Oleg V. Khokhryakov, doctor of technical sciences, associate professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation. Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it |
| Title of the article | Investigation of the properties of fine-grained asphalt concrete designed by different methods |
| Abstract. | The road structural layers consist of the underlying layer, the base and the coating layers. It perceives pressures from mobile loads and distributes them along the roadbed. Since the greatest pressure occurs on the surface and decreases in depth, the road needs durable structural layers, which in turn require the use of high-quality materials compacted to a high density. The aim of the work is a comparative analysis of the stability of asphalt concrete, selected by different methods, to the formation of plasticity rutting. The objectives of the study are the selection of composition by methods of limit curves of dense mixtures, volumetric design methods, as well as evaluation of the physical and mechanical properties of asphalt concrete mixtures selected by various methods and evaluation of the propensity of selected compositions to form plasticity rutting. Results. The paper presents the results of comparative tests of asphalt concrete selected by volumetric design methods (SP-16, A16ВН) and the method of limit curves (type B Grade I), as well as the results of testing samples of asphalt concrete for the formation of plasticity rutting. Comparative tests of the physical and mechanical properties of asphalt concrete SP-16, A16ВН and type B Grade I showed that the coefficient of water resistance for asphalt concrete SP-16 and A16ВН meets the requirements of regulatory parameters and is (0.96%) for SP-16, (0.93%) for A16ВН. For asphalt concrete Type B grade I, the coefficient of water resistance is (0.79%). The results of tests for the formation of plasticity rutting showed that for asphalt concrete SP-16 and A16ВН, the rutting meets the requirements of regulatory documents and is 2.29 mm and 5.74 mm, respectively, and for asphalt concrete Type B grade I is 12.22 mm. The coefficient of water resistance and resistance to rutting of asphalt concrete Type B grade I is significantly inferior to asphalt concrete SP-16 and A16ВН. Conclusions. The results of the study will allow us to draw conclusions about the most effective methods of selecting asphalt concrete from the point of view of resistance to the formation of plasticity rutting. The data obtained can be used in the construction and operation of the road surface to increase its durability and stability. |
| Keywords. | road structural layers, asphalt concrete, grain composition, frost resistance, water resistance, rutting |
| For citations: | Smirnov D.S., Belyaeva K.R., Khokhryakov O.V. Investigation of the properties of fine-grained asphalt concrete designed by different methods // News KSUAE, 2023, № 3(65), p. 66-76, DOI: 10.52409/20731523_2023_3_66, EDN: DXTELC |
