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. | Vdovin Evgeny Anatolyevich candidate of technical sciences, associate professor Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Bulanov Pavel Efimovich candidate of technical sciences, associate professor Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Mavliev Lenar Fidaesovich candidate of technical sciences, associate professor Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan State University of Architecture and Engineering The organization address: 420043, Russia, Kazan, Zelenaya st., 1 |
| Title of the article | Modification of cement-sand-gravel mixtures with waste from road construction industries |
| Abstract. | Problem statement. The aim of the research is to study the effect of road construction waste (asphalt granulates, stone crushing screenings and thermoactivated dust of asphalt mixing plants) on the physical and technical properties of cement-sand-gravel mixtures for road pavements of highways. The relevance of the study is justified by the need to utilize waste generated during the milling of asphalt concrete pavements during the repair and reconstruction of highways, during the production of crushed stone in quarries, as well as the preparation of asphalt concrete mixtures at production bases. Results. The results of the study consist in determining the level of indicators of physical and technical properties (ultimate compressive strength, ultimate tensile strength in bending, frost resistance) of cement-sand-gravel mixtures with the addition of asphalt granulate, screening of stone crushing and thermoactivated dust of asphalt mixing plants. Modification of cement-sand-gravel mixtures with waste from road construction industries revealed the possibility of reducing the content of Portland cement in mixtures from 17 to 25%, depending on the grade obtained in terms of strength and frost resistance of the processed material of road pavements, and also expanded the methods of utilizing industrial waste and reducing their ecological impact on the environment. Conclusions. The dependences of changes in the levels of indicators of the main physical and technical properties of cement-sand-gravel mixtures modified by waste from road construction industries were revealed, on the basis of which the optimal compositions of materials for road pavements of highways were developed. It has been established that the introduction of thermally activated dust from asphalt mixing plants enhances the physical and technical properties and reduces the content of binder in cement-sand-gravel materials of road pavements, and utilization of asphalt granulate and stone crushing screenings is possible by adding them to materials as granulometric modifiers. |
| Keywords. | cement-sand-gravel mixture, modification, strength, frost resistance, pavement structure, asphalt granulate, stone crushing screening, thermoactivated dust waste |
| For citations: | Vdovin E. A., Bulanov P. E., Mavliev L. F. Modification of cement-sand-gravel mixtures with waste from road construction industries. Izvestiya KGASU. 2021. No. 3 (57). P. 32–41. DOI: 10.52409/20731523_2021_3_32 |
