CC BY
5
y^K 691
Umirdinov I. O. assistant
Fergana Polytechnic Institute
ASPHALT CONCRETE IN HOT-DRY CLIMATE CONDITIONS
DEVELOPMENT DEFICIENCIES AND ITS ELIMINATION
Annotation: Bitumen-rubber mixture increases the porosity of asphalt-concrete, its resistance to harmful environmental influences
Key words: rubber powder, asphalt-concrete, bitumen-rubber mixture.
The country pays great attention to capital construction, including road construction, and the state allocates a lot of material and financial resources for its further development. Asphalt concrete is widely used in the construction and reconstruction of road infrastructure.
The results of research aimed at studying the technical condition of existing roads in recent years, as well as data collected during their operation, showed the deterioration of asphalt-concrete pavements and rapid deterioration of road quality in hot and dry climates of the country. These days, in order to further improve the quality of asphalt-concrete roads, scientists of the Republic are doing great research on the production of activated powders from local mineral stones, the use of road polymer-bitumen compositions, improved asphalt-concrete composition.
For the first time, scientific and practical work to increase the durability of asphalt concrete in a hot-dry environment was aimed at improving its properties by adding natural rubber to it. The subsequent creation of artificial rubber led to a reduction in the cost of rubber. This has provided economic benefits in improving the quality of roads. Year by year, the demand for constructive durability of roads and further reduction of their cost has increased. Broken car tires were recommended instead of synthetic rubber. As a result of the further expansion of road construction, scientists have proposed new polymer compounds. As a result of the further expansion of road construction, scientists have proposed new polymer compounds.
There are many ways to add polymer compounds to molten bitumen or asphalt-concrete mix. Among them, the scientists of the Institute of General and Inorganic Chemistry of the Academy of Sciences of Uzbekistan SPEOP polymer compound TAYI scientists (Khojimetov N, Kasimov I) added to the asphalt concrete and managed to increase its resistance to sliding in thick and liquid conditions.
The use of rubber powder to improve the quality of asphalt concrete has become widespread in road construction. The rubber-bituminous asphalt-concrete
mixture is mixed at 180-220 ° C for 4-5 hours to make it uniform and smooth. If such heating lasts 10-14 hours, the efficiency of rubber in bitumen does not exceed 10%. It is known that tire rubber does not dissolve in bitumen at all, only much. That is why the rubber industry produces baked or unbaked rubber powder. This powder dissolves quickly in bitumen in 15-40 minutes at a temperature of 130-160 ° C and does not adversely affect the asphalt-concrete mixture. The advantage of the rubber compound is that it binds fine and coarse aggregates together with mineral powder and bitumen to form an elastic and sticky slurry. This prolongs the durability of the asphalt-concrete road in hot-dry climates. Bitumen-rubber mixture increases the porosity of asphalt-concrete, its resistance to harmful environmental influences. The water permeability of asphalt concrete added in the amount of 3% of rubber powder is reduced by 10 times, and the frost resistance is increased by at least 30%. The bite of the car tire on the asphalt-concrete surface of the road will increase by 20-40%. i
Referenses:
1. Абдукаримов Б. А. и др. Способы снижения аэродинамического сопротивления калориферов в системе воздушного отопления ткацких производств и вопросы расчета их тепловых характеристик //Достижения науки и образования. - 2019. - №. 2 (43).
2. Бахромов М. М., Отакулов Б. А., Рахимов Э. Х. У. Определение сил негативного трения при оттаивании околосвайного грунта //European science. - 2019. - №. 1 (43).
3. Юсупов А. Р. и др. К расчёту неравнопрочных термогрунтовых тел на сдвигающие нагрузки //Достижения науки и образования. - 2019. - №. 2 (43).
4. Мирзажонов М. А., Отакулов Б. А. Влияние на прочность контактной зоны рабочего стыка времени выдержки нового бетона //XLIII INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE" INTERNATIONAL SCIENTIFIC REVIEW OF THE PROBLEMS AND PROSPECTS OF MODERN SCIENCE AND EDUCATION". - 2018. - С. 2224.
5. Мирзажонов М. А., Отакулов Б. А. Восстановление разрушенных частей бетонных и железобетонных конструкций //Достижения науки и образования. - 2018. - №. 13 (35). - С. 13-14.
6. Xalimjon o'gli S. J. 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. - 2021. -Т. 8. - №. 5. - С. 1-2.
7. Abobakirovich A. B. et al. Increasing the efficiency of solar air heaters in free convection conditions //Достижения науки и образования. - 2019. - №. 2 (43).
8. 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.
9. 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.
10. 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.
11. 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.
12. 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.
13. 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.
14. 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.
15. 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.
16. 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.
17. Adhamovich O. B., Saydi-axmadovich Y. B. EFFECT OF POLYMERY MONOMORES ON THE STRENGTH OF OLD AND CONCRETE CONCRETES.
18. 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.
19. 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
20. 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.
