ADDING ADDITIONAL MATERIALS TO ASPHALT-CONCRETE MIXTURES TO INCREASE ITS STRENGTH

Аннотация

This article talks about adding additional materials to asphalt concrete mixtures and increasing its strength. Asphalt concrete is one of the construction materials with a complex structure. Its complexity lies in the fact that its properties depend on various factors and undergo drastic changes as a result of the temperature of the weather. These properties of asphalt concreteare unique from other building materials used in road construction. Key words: asphalt concrete, mineral powder, strength visco-plastic state, deformation properties of asphalt concrete. Annotatsiya. Ushbu maqolada asfaltobeton qorishmalariga qoʻshimcha materiallar qoʻshib uning mustahkamligini oshirish haqida so`z yuritilgan. Asfaltobeton strukturasi murakkab bo„lgan qurilish materiallari sarasiga kiradi. Uning murakkabligi shundan iboratki, uning xususiyatlari rangbarang faktorlarga bog„liq bo„lib ob-havoning xarorati natijasida keskin o„zgarishlarga molik bo„ladi. Asfaltobetonning bu xususiyatlari yoʻl qurilishida qoʻllaniladigan boshqaqurilishmateriallaridan o„ziga xosligi bilan alohidaajralib turadi. Kalit so‘zlar: asfaltbeton, mineral kukun, mustahkamlik qovushqoq - plastik holatini, asfaltbetonning deformatsionxususiyati. Аннотатция. В данной статье рассказывается о добавлении в асфальтобетонные смеси дополнительных материалов и повышении их прочности. Асфальтобетон относится к строительным материалам со сложной структурой.Его сложность заключается в том, что его свойства зависят от различных факторов и претерпевают резкие изменения в результате температуры погоды. Эти свойства асфальтобетона уникальны по сравнению сдругими строительными материалами,используемыми вдорожномстроительстве. Ключевые слова: асфальтобетон, минеральный порошок, прочностное вязкопластическоесостояние,деформационные свойстваасфальтобетона. Road construction materials are selected before the construction of highways and road structures. When choosing road construction materials, it is necessary to take into account the conditions under which highways and structures will operate and how they can withstand external forces. It is impossible to choose materials for road construction without knowing in advance the deformations that occur in the road surface due to traffic, that is, the geometric changes and the relationship between these changes and stresses. Therefore, it is necessary to know in advance the indicators that represent thecomposition, structure, chemical, physical and mechanical properties, technology and usage characteristics of the materials necessary for the construction and repairof highways and structures. Asphalt concrete is one of the construction materials with a complex structure. Its complexity lies in the fact that its properties depend on various factors and undergo drastic changes as a page1951 INTERNATIONAL JOURNAL OF ARTIFICIAL INTELLIGENCE ISSN:2692-5206,ImpactFactor:12,23 AmericanAcademicpublishers,volume05,issue06,2025 Journal: https://www.academicpublishers.org/journals/index.php/ijai result of the temperature of the weather. These properties of asphalt concrete are unique from other building materials used in road construction. Asphaltoconcrete is characterized by its visco-plasticstateat positiveweather temperatures andvice versa at negative temperatures. Asphaltobeton has useful and negative properties. The useful properties of asphalt concrete are as follows: it is very strong at its elastic limit, it is resistant to bending and deformation and it has the ability to absorb vibration forces generated by transport. Asphalt-concrete road can be put into use in a short time, repair works are carried out quickly and simply. The negative properties of asphalt concrete are as follows: as a result of the erosion of organic binding materials inasphalt concrete, asphalt concrete isalso eroded. Under theinfluence ofthe external environment, asphalt concretechanges its elastic properties, and as a result, cracks appear on the surface of the road. Construction work depends on the weather and thementioned shortcomings lead to high cost ofconstruction work. Theclassification ofasphalt concrete isas follows: 1.During thelaying ofhot asphalt-concrete joints,thetemperature is 1201600,thecompaction temperature is 90-1600С. Bitumens with high adhesive properties - BND 40/60, BND 60/90, BND-90/130 -are used forhot asphalt concrete surfaces. 2. The temperature during the preparation of warm asphalt concrete mixtures is 90-1400С, the temperature during laying is 70-1000С. the condensation temperature should not be less than 60-800C. Bitumens with medium viscosity (BND 130/200, BND 200/300, SG 130/200) are used in thepreparation ofwarm asphalt-concrete mixture. 3. The temperature during the preparation of cold asphalt concrete is 80 1000C. the temperature during laying and densification should be 5-400 C. Cold asphalt concrete pavements are made by using liquid bitumen (MG 70/130 or SG 70/130) belonging to medium- absorbing orslow-absorbing (ST