CC BY
3
УДК 691
Sobirova D. T. assistant
Fergana Polytechnic Institute 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.
Referenses:
1. Abobakirovich A. B. et al. Increasing the efficiency of solar air heaters in free convection conditions //Достижения науки и образования. - 2019. - №. 2 (43).
2. Otakulov B. A., Karimova M. I. Q., Abdullayev I. A. Use of mineral wool and its products in the construction of buildings and structures //Scientific progress. -2021. - Т. 2. - №. 6. - С. 1880-1882.
3. Otakulov B. A., Abdullayev I. A., Sultonov K. S. O. RAW MATERIAL BASE OF CONSTRUCTION MATERIALS AND USE OF INDUSTRIAL WASTE //Scientific progress. - 2021. - Т. 2. - №. 6. - С. 1609-1612.
4. Tulaganov A. et al. Festigkeitsbeschreibung des schwerbetons auf alkalischlacken-bindemittel //The Scientific-Practice Journal of Architecture, Construction and Design. - 2021. - Т. 1. - №. 1. - С. 5.
5. Otakulov B. A., Abdullayev I. A., Toshpulatov J. O. O. IMPORTANCE OF HEAT-RESISTANT CONCRETE IN CONSTRUCTION //Scientific progress. -2021. - Т. 2. - №. 6. - С. 1613-1616.
6. Otakulov B. A., Isoyev Y. A., Salimjonov J. H. O. G. L. ABOUT MONOLITHIC REINFORCED CONCRETE STRUCTURES IN CONSTRUCTION //Scientific progress. - 2021. - Т. 2. - №. 7. - С. 722-724.
7. Otakulov B. A., Isoyev Y. A., Salimjonov J. H. O. G. L. THE SCIENCE OF BUILDING MATERIALS TAKES PLACE IN ARCHITECTURE //Scientific progress. - 2021. - Т. 2. - №. 7. - С. 725-727.
8. Otakulov B. A., Isoyev Y. A., Salimjonov J. H. O. G. L. WAYS TO SAVE CERAMICS AND FIRE BUILDING MATERIALS //Scientific progress. - 2021.
- Т. 2. - №. 7. - С. 718-721.
9. Otakulov B. A., Isoyev Y. A., Sailimjonov J. X. O. G. L. IMPROVING THE EARTHQUAKE RESISTANCE AND HEAT RESISTANCE OF BUILDINGS BUILT OF MODERN ENERGY-SAVING MATERIALS //Scientific progress.
- 2021. - Т. 2. - №. 7. - С. 117-120.
10. Otakulov B. A., Karimova M. I. Q., Abdullayev I. A. Improving the durability of asphalt-concrete //Scientific progress. - 2021. - Т. 2. - №. 7. - С. 121-124.
11. Adhamovich O. B., Saydi-axmadovich Y. B. EFFECT OF POLYMERY MONOMORES ON THE STRENGTH OF OLD AND CONCRETE CONCRETES.
12. Adhamovich O. B., Nabijonovich A. N. M., Madaminova R. G. Q. THE ROLE OF MONOLITHIC REINFORCED CONCRETE CONSTRUCTION IN MODERN CONSTRUCTION //Scientific progress. - 2021. - Т. 2. - №. 8. - С. 735-739.
13. Otakulov B. A. et al. WORKING JOINTS OF MONOLITHIC AND PREFABRICATED STRUCTURES AND METHODS OF OVERCOMING THEIR NEGATIVE CONSEQUENCES //Scientific progress. - 2021. - Т. 2. -№. 8. - С. 731-734
14. Мирзаев Б. К., Собирова Д. Т., Умирдинов И. О. Методы Повышения Физико-Механических Свойств Вермикулитного Бетона //CENTRAL ASIAN JOURNAL OF THEORETICAL & APPLIED SCIENCES. - 2021. - Т. 2. - №. 12. - С. 293-297.
15. SOBIROVA D. T. et al. Determination of the Bearing Capacity of Flexible Reinforced Concrete Beams of Rectangular Section with a One-sided Compression Flange on the Boundary Conditions of Concrete and Reinforcement //International Journal of Innovations in Engineering Research and Technology.
- Т. 7. - №. 12. - С. 122-124.
16. Xalikova I. THE ESTABLISHMENT AND DEVELOPMENT OF JADID NEW METHOD SCHOOLS IN FERGHANA VALLEY //Конференции. -2021.
17. Собирова Д. Т., Каримова М. И. Проектирование Коррозиестойких Защитных Слоев Легкобетонных Стеновых Конструкций //CENTRAL ASIAN JOURNAL OF THEORETICAL & APPLIED SCIENCES. - 2021. - Т. 2. - №. 12. - С. 298-300.
18. Otakulov B. A., Sobirova D. T., Yokubova M. T. Q. RAW MATERIALS AND OPTIMAL COMPOSITIONS FOR NEW GENERATION CELLULAR CONCRETE //Scientific progress. - 2021. - Т. 2. - №. 8. - С. 473-478.
19. Sobirova D. T. Women of Uzbekistan in the Soviet Period Participation in Social and Political Spheres //TJS-Tematics journal of Sociology ISSN. - 2021.
- С. 2249-2987.
20. Otakulov B. A., Sobirova D. T., Yokubova M. T. Q. FACTORS THAT REDUCE THE HEAT-SHIELDING PROPERTIES OF ENCLOSING STRUCTURES //Scientific progress. - 2021. - Т. 2. - №. 8. - С. 479-485.
21. Otakulov B. A., Sobirova D. T., Yokubova M. T. Q. INFLUENCE OF DRY AND HOT CLIMATE ON CONCRETE AND REINFORCED CONCRETE STRUCTURES //Scientific progress. - 2021. - Т. 2. - №. 8. - С. 486-489.
