CC BY
4
УДК 691
Ergashev M.M., candidate of technical sciences
associate professor
department production of building materials and structures
Fergana Polytechnic Institute
Uzbekistan
FROM INDUSTRIAL WASTE IN ROAD CONSTRUCTION USE
Annotation: The use of obsolete asphalt-concrete will reduce the construction and repair of roads, ensure that they will not be damaged for many years, reduce costs and increase economic efficiency, as well as improve the environment
Key words: Construction, asphalt-concrete, economic efficiency.
Construction is the most materially and costly sector of the national economy. At present, the cost of construction materials and products is 60% of the cost of construction and installation work, or one third of the state budget. Therefore, the main factor in reducing the cost of construction work is to reduce the cost of construction materials, to further improve the methods of their production, to replace some of the previously used building materials with new ones, to build new ones on the basis of modern technologies. and their proper and prudent use in their place.
The share of secondary materials and waste in the development of the national economy, especially in the construction industry, is growing. On this basis, our scientists make proposals for the production of new and effective building materials. One of the secondary materials is the old asphalt-concrete, which over the years has been the top layer on our urban and rural roads, raising the road surface. In road construction, new asphalt-concrete will be laid on the old, broken asphalt. As a result, the thickness of the road surface, especially on city streets, increases to 40-50 cm. When the roads were repaired, the old asphalt-concrete layer was torn off, piled on the side of the street, and thrown away as garbage. There were times when 45-60 tons of old asphalt-concrete was removed from the city of Tashkent a year. However, if the old asphalt-concrete was recycled, 28-40 thousand tons of natural stone and 2.1-2.6 thousand tons of bitumen would be saved. The technology of processing old asphalt-concrete mainly consists of heating the surface of worn or damaged asphalt-concrete, tearing off the melted layer, adding the required amount of additional bitumen, compacting the finished asphalt-concrete mixture.
At present, several methods of processing old asphalt concrete have been developed. Among the methods of regeneration of asphalt concrete, heating with a high-frequency electric field was found to be the most cost-effective. Because, according to this method, heat energy is generated due to moisture and water
heating inside the pores of the asphalt-concrete layer. Fine and coarse aggregates in the asphalt-concrete composition, which have become obsolete over the years, turn the surface into an activated mineral stone due to the absorption of binding bitumen in it. Such aggregates are of the highest quality for recycled asphalt-concrete mix. Before developing the technology of using outdated asphalt concrete, its properties are thoroughly studied in the laboratory. Cylindrical specimens are carved from long-used (15 and 40 years old) asphalt concrete. The bitumen in it is divided into fine and coarse aggregates and tested. According to state standards, the average durability of asphalt-concrete pavement is 10-13 years.
The use of obsolete asphalt-concrete will reduce the construction and repair of roads, ensure that they will not be damaged for many years, reduce costs and increase economic efficiency, as well as improve the environment.
References:
1. Эргашев, М. М. (2020). Утилизация строительных отходов-мировой опыт. Теория и практика современной науки, (10), 90-93.
2. Эргашев Махмуд Махаммаджанович, Мамажонов Алишер Урагович, Умирзаков Зухриддин Ахтамжонович, & Насирдинов Хасан Шавкатович (2019). ВЛИЯНИЕ НАПОЛНИТЕЛЯ И ДОБАВКИ АЦФ-3М НА РЕОЛОГИЧЕСКИЕ СВОЙСТВА ЦЕМЕНТНОГО ТЕСТА. Проблемы современной науки и образования, (12-2 (145)), 39-46. doi: 10.24411/23042338-2019-11207
3. Эргашев, М. М. (2020). Применение нанотехнологий в производстве цемента. Экономика и социум, (1), 952-955.
4. Эргашев, М. М. (2020). Строительная индустрия узбекистана: перспективы развития. Экономика и социум, (1), 947-951.
5. Yunusov, M. P., Teshabaev, Z. A., Mirzaeva, E. I., Nasullaev, K. A., Ergashev, M. M., Ruzimuradov, O. N., & Murzin, D. Y. (2022). Effect of protective bed composition on deactivation of a hydrotreating catalyst. Journal of Chemical Technology & Biotechnology, 97(3), 771-778.
6. Mamadjanovich, E. M. (2021). TECHNOLOGY PREPARATION OF OILS FOR MODERN ENGINES ON THE BASIS OF RAW MATERIAL AND HIGH SULFUR CONTENT. Innovative Technological Methodical Research Journal, 2(11), 127-132.
7. Эргашев, М. М. (2021). ПРИМЕНЕНИЕ СТРОИТЕЛЬНОЙ КЕРАМИКИ В СОВРЕМЕННОЙ ИНДУСТРИИ И ЖИЛИЩНОМ СТРОИТЕЛЬСТВЕ. Экономика и социум, (6-2), 608-611.
8. Yunusov, M. P., Molodozhenyuk, T. B., Ergashev, M. M., Dzhalalova, S. B., Gashenko, G. A., & Saidulaev, B. M. (2007). Investigation of a system of protecting layer for the process of hydrorefmmg oily distillates of Uzbekistan's petroleum. Russian Journal of Applied Chemistry, 80(7), 1207-1212.
9. Эргашев, М. М. (2020). Утилизация строительных отходов-мировой опыт. Теория и практика современной науки, (10), 90-93.
10. Эргашев Махмуд Махаммаджанович, Мамажонов Алишер Урагович, Умирзаков Зухриддин Ахтамжонович, & Насирдинов Хасан Шавкатович (2019). ВЛИЯНИЕ НАПОЛНИТЕЛЯ И ДОБАВКИ АЦФ-3М НА РЕОЛОГИЧЕСКИЕ СВОЙСТВА ЦЕМЕНТНОГО ТЕСТА. Проблемы современной науки и образования, (12-2 (145)), 39-46. doi: 10.24411/23042338-2019-11207
11. Эргашев, М. М. (2020). Применение нанотехнологий в производстве цемента. Экономика и социум, (1), 952-955.
12. Эргашев, М. М. (2020). Строительная индустрия узбекистана: перспективы развития. Экономика и социум, (1), 947-951.
13. Yunusov, M. P., Teshabaev, Z. A., Mirzaeva, E. I., Nasullaev, K. A., Ergashev, M. M., Ruzimuradov, O. N., & Murzin, D. Y. (2022). Effect of protective bed composition on deactivation of a hydrotreating catalyst. Journal of Chemical Technology & Biotechnology, 97(3), 771-778.
14. Mamadjanovich, E. M. (2021). TECHNOLOGY PREPARATION OF OILS FOR MODERN ENGINES ON THE BASIS OF RAW MATERIAL AND HIGH SULFUR CONTENT. Innovative Technologica: Methodical Research Journal, 2(11), 127-132.
15. Эргашев, М. М. (2021). ПРИМЕНЕНИЕ СТРОИТЕЛЬНОЙ КЕРАМИКИ В СОВРЕМЕННОЙ ИНДУСТРИИ И ЖИЛИЩНОМ СТРОИТЕЛЬСТВЕ. Экономика и социум, (6-2), 608-611.
16. Yunusov, M. P., Molodozhenyuk, T. B., Ergashev, M. M., Dzhalalova, S. B., Gashenko, G. A., & Saidulaev, B. M. (2007). Investigation of a system of protecting layer for the process of hydrorefining oily distillates of Uzbekistan's petroleum. Russian Journal of Applied Chemistry, 80(7), 1207-1212.
17. Бахромов, М. М., Отакулов, Б. А., & Рахимов, Э. Х. У. (2019). Определение сил негативного трения при оттаивании околосвайного грунта. European science, (1 (43)).
18. Юсупов, А. Р., Милладжонова, З. Р., Отакулов, Б. А., & Рахимов, Э. Х. У. (2019). К расчёту неравнопрочных термогрунтовых тел на сдвигающие нагрузки. Достижения науки и образования, (2 (43)).
19. Мирзажонов, М. А., & Отакулов, Б. А. (2018). Восстановление разрушенных частей бетонных и железобетонных конструкций. Достижения науки и образования, (13 (35)).
20. Xalimjon o'gli, S. J. (2021). INFLUENCE ON DURABILITY OF CONTACT ZONE OF WORKING JOINT TIME OF THE ENDURANCE OF A NEW CONCRETE. EPRA International Journal of Environmental Economics, Commerce and Educational Management, 8(5), 1-2.
21. Otakulov, B. A., Karimova, M. I. Q., & Abdullayev, I. A. (2021). Use of mineral wool and its products in the construction of buildings and structures. Scientific progress, 2(6), 1880-1882.
22. Otakulov, B. A., Abdullayev, I. A., & Sultonov, K. S. O. (2021). RAW MATERIAL BASE OF CONSTRUCTION MATERIALS AND USE OF INDUSTRIAL WASTE. Scientific progress, 2(6), 1609-1612.
