scholarly journals Mathematical modeling of improving the characteristics of bitumen for asphalt concrete by modifying

2021 ◽  
Vol 2131 (4) ◽  
pp. 042039
Author(s):  
G Provatorova ◽  
K Ryabinina
Keyword(s):  
Asphalt Concrete ◽  
Weather Conditions ◽  
Road Surface ◽  
Rutting Resistance ◽  
The Road ◽  
Concrete Mixtures ◽  
Additional Equipment ◽  
Materials Used ◽  
Modified Binder ◽  
The Stability

Abstract A significant increase in traffic intensity and increased axle loads of vehicles on the roads led to the fact that asphalt concrete is not able to provide the required durability of road surfaces. The durability of asphalt concrete pavements is directly related to the quality of the materials used, primarily bitumen. Bitumen is most susceptible to changes under the influence of traffic loads and weather conditions. At the same time, bitumen largely determines the condition of the road surface. The behavior of bitumen can be changed by modifying it with additives. The novelty of bitumen modification lies in the fact that the addition of polymer to bitumen makes it possible to obtain a road surface that is resistant to cracking at low temperatures and to provide fatigue strength at high temperatures. Rutting resistance is also achieved. An important role in the choice of the modifier is played by economic issues related to the rise in the cost of coating, as well as the need to use additional equipment, the stability of the modified binder during storage and transportation, etc. Carbon nanotubes (CNTs) were used as a modifier for asphalt concrete mixtures. During the experiment, a significant improvement in the main indicators of asphalt concrete mixtures was revealed, as well as the maximum permissible deviations for the amount of binder in the asphalt concrete mixture and for the main indicators were observed. Moreover, the most important thing that has been achieved is a significant increase in rutting resistance by rolling a loaded wheel.

scholarly journals Investigation of the wear of asphalt concrete pavement taking into account the influence of temperature, moisture of the pavement and the presence of an aggressive environment

2021 ◽  
Vol 2 (92) ◽  
pp. 68
Author(s):  
Andrii Siedov ◽  
Olena Fomenko
Keyword(s):  
Asphalt Concrete ◽  
High Speed ◽  
Climatic Factors ◽  
Load Capacity ◽  
Weather Conditions ◽  
Road Surface ◽  
Winter Period ◽  
Influence Of Temperature ◽  
The Road ◽  
Industrial Enterprises

Abstract. The emergence of a large number of modern high-speed cars with improved dynamic characteristics and an increase in the share of cars, especially large load capacity, have significantly accelerated the destruction of asphalt roads. Plastic deformations, tracks and cracks are more and more often observed on asphalt concrete pavements of roads, their wear is accelerated. As a result, the transport and operational condition of roads deteriorates, the speed of traffic decreases, the cost of road transport increases, and increasing costs are required for road repairs. Thus, the conditions of traction of the wheels of the car with the road surface are influenced by the service life of the coating, traffic intensity, the amount of harmful emissions of industrial enterprises and climatic factors. At the same time uneven change of conditions of coupling in cross and longitudinal profiles of the highway comes to light. Analyzing the natural and climatic factors, we can establish that different weather conditions have different effects on the condition of the road surface. In summer, the condition of the surface is dry and clean, so the driving conditions are safe. Taking into account all the factors that lead to the destruction of the coating with the formation of residual deformations and irreversible changes, requires the study of wear of the coating surface. he wear of the coating largely depends on the friction force in the area of contact of the tire with the surface of the coating, the type of tires and the pressure in the tires. But the random nature of changes in the intensity and composition of traffic, seasons, temperature, humidity, rainfall affects the amount of wear over a period of operation of the road surface. The presence of water or solutions in the pores of the coating leads to the separation of mineral particles from the layer under the action of impact force from the wheels of vehicles. It is experimentally established that the wear of asphalt concrete in the dry and wet state increases with increasing temperature. One of the main types of damage to road surfaces is their premature wear under the influence of vehicle wheels, in combination with changing weather conditions. Analyzing the natural and climatic factors, we can establish that different weather conditions have different effects on the condition of the road surface. The article considers the influence of temperature, humidity and the presence of solutions of chloride anti-icing materials on the process of abrasion of asphalt pavement in the autumn-winter period. Occurrence of big differences of temperature and humidity accelerates processes of aging of materials from which layers are made, influencing their durability and wear resistance.

scholarly journals Improving The Performance of Asphalt Concrete Mixtures With Polymer Asphalt in Submerged Floods

2021 ◽  
Vol 2 (02) ◽  
pp. 62-69
Author(s):  
Yanuar Setiawan ◽  
Erlina Yanuarini ◽  
Nunung Martina ◽  
Muhammad Fathur Rouf Hasan ◽  
Rinawati Rinawati
Keyword(s):  
Asphalt Concrete ◽  
Asphalt Pavement ◽  
Water Immersion ◽  
The Road ◽  
Concrete Mixtures ◽  
Asphalt Content ◽  
The Difference ◽  
The Stability

The road conditions which is always submerged can reduce the performance of the asphalt pavement. This research was conducted to obtain the characteristics of polymer asphalt concrete against flooding. Marshall testing was carried out on conventional and polymer asphalt concrete with optimum asphalt content treated with water immersion in variations of 0 days, 0.5 days, 1 day, 2 days, and 4 days. The results show polymer asphalt can improve the durability of asphalt concrete which is submerged in floodwater. This is indicated by the difference in the stability value of 113% in the variation of immersion for 4 days.

scholarly journals ROAD SURFACE OF THE PAVEMENT COATING BRIDGE

2021 ◽  
Vol 6 (4) ◽  
pp. 21-35
Author(s):  
M. Vysotskaya ◽  
A. Kurlykina ◽  
D. Kuznecov ◽  
A. Tkacheva
Keyword(s):  
Asphalt Concrete ◽  
Concrete Surface ◽  
Operational Reliability ◽  
Road Surface ◽  
Structural Defects ◽  
Self Healing ◽  
Concrete Mixtures ◽  
Bridge Structures ◽  
The Rich ◽  
Materials Used

The current topic of the reliability of bridge structures in modern conditions and the role of the structural layers of the roadway (road surface) in increasing and maintaining their operational reliability and durability are considered. The existing standard designs of road surface clothing and the materials used for their arrangement are considered. The analysis and systematization of information from Russian and foreign sources on the construction of the clothing of the driving road indicates the prospects and technical and operational advantages of using cast asphalt concrete mixtures in the upper layers of the bridge pavement. It is noted that an effective road surface made of this material is capable of resisting existing loads, taking into account the specifics of the operation of the asphalt concrete surface during the established service life, additionally performing the protective waterproofing function of the metal structures of the bridge structure. The analysis of the literature demonstrates that active scientific research on the development and creation of effective cast asphalt concrete mixtures is primarily associated with the production and modification of its bituminous part, as a medium capable of initiating "self-healing" of the composite, independently eliminating structural defects. The rich experience of various methods of modifying bituminous binders, accumulated over the past few decades, allows to predict the prospects for using cast asphalt concrete in the construction of the roadway of bridge structures, based on improved binders, in order to create new high-quality materials that can improve the quality of the bridge network in the country.

scholarly journals Evaluation of the interaction of tyre tread with asphalt concrete coating depending on weather-climatic conditions

2021 ◽  
Vol 18 (4) ◽  
pp. 122-126
Author(s):  
I. S. Gladushevskiy ◽  
Keyword(s):  
Asphalt Concrete ◽  
Weather Conditions ◽  
Concrete Surface ◽  
Climatic Conditions ◽  
Road Surface ◽  
Coupling Coefficients ◽  
Internal Factors ◽  
The Road ◽  
Concrete Coating

The tyre tread coupling with the road surface depends on a number of both external and internal factors. The controllability of the vehicle depends on the interaction between two materials. The article considers various tyre tread characteristics, the values of the coupling coefficients are determined for the tyre tread of M1 category vehicles during operation on different road conditions. The interaction of a new and worn tyre tread with the road surface has been assessed with vehicles driving on the asphalt concrete surface, taking into account weather conditions.

scholarly journals INCREASING THE RESISTANCE OF MACADAM-MASTIC ASPHALT CONCRETE TO RUT FORMATION DUE TO THE USE OF POLYMER MODIFIERS

2021 ◽  
Vol 3 (6) ◽  
pp. 27-34
Author(s):  
V. Yadykina ◽  
S. Navolokina ◽  
Anatoliy Gridchin
Keyword(s):  
Service Life ◽  
Asphalt Concrete ◽  
The Road ◽  
Mastic Asphalt ◽  
Concrete Mixtures ◽  
Complex Additive ◽  
Road Surfaces ◽  
High Elasticity ◽  
Binder Composition ◽  
Modified Binder

Rutting is an important problem in Russia today. One of the ways to improve the properties of asphalt concrete mixtures and reduce wear on road surfaces is to modify the binder with polymer additives. The aim of the work was to test the selected compositions of MMAC mixtures containing bitumen modified with the addition of sevilene and rubber for rutting resistance, which make it possible to predict the formation of plastic rut. It was revealed that when using sevilen in its composition, with an increase in the concentration of vinyl acetate, the depth of the track increases in comparison with the industrial polymer-bitumen binder. It is shown that with the introduction of a complex additive based on sevilen and rubber into the binder composition, its rutting decreases and the service life of the road surface increases, which indicates a high elasticity of the complex-modified binder. In this work, the calculation of the service life of the coating before the formation of a critical rut requiring repair of the coating is carried out. It was found that in terms of the slope of the rutting curve and the proportional depth of the rut, the compositions with sevilene and rubber are not inferior to traditional industrial PBB.

scholarly journals Effect of carbon nanotubes on the properties of pmb and asphalt concrete

Vestnik MGSU ◽  
2015 ◽  
pp. 110-119 ◽  
Author(s):  
Svetlana Yur’evna Shekhovtsova ◽  
Marina Alekseevna Vysotskaya
Keyword(s):  
Asphalt Concrete ◽  
Water Resistance ◽  
Materials Science ◽  
Crosslinking Agent ◽  
Modern World ◽  
Progressive Development ◽  
Concrete Mixtures ◽  
Deformation Properties ◽  
Strength And Deformation ◽  
Modified Binder

In the modern world nanotechnologies are an integral part of successful and progressive development of all the areas of activity. Materials science is not an exception. The authors studied the method of nanomodification and its influence on the performance properties of polymer-modified binder (PMB) and asphalt concrete, produced on their basis. It is established that nanomodified PMB are less susceptible to aging, which is a consequence of the processes of peptization of asphalt-resin complexes (ARC) in the structure of the modified binder and the crosslinking with the polymer matrix. It is revealed that nanotubes (SWCN or MWCN) used as a modifier, act as crosslinking agent and the inhibitor of the aging process in a PMB. The influence of nanomodified PMB on strength and deformation properties of asphalt concrete is investigated. It was found out that the use of modified binder in the asphalt concrete mixtures enhances the water resistance of asphalt concrete, heat resistance and shear-resistance.

scholarly journals Analisis Kebutuhan dan Biaya Alat Berat untuk Pekerjaan Pemadatan Lapisan Permukaan Street-Race Circuit Mandalika

2021 ◽  
pp. 1-8
Author(s):  
A. Fihani ◽  
Hasyim Hasyim ◽  
I.D.M.A. Karyawan
Keyword(s):  
Surface Layer ◽  
Asphalt Concrete ◽  
Road Surface ◽  
Pneumatic Tire ◽  
Total Cost ◽  
Air Compressor ◽  
The Road ◽  
Heavy Equipment ◽  
Dump Trucks ◽  
Base Course

The Street-Race Circuit is being built in the Mandalika Tourism Special Economic Zone (KEK), Central Lombok, West Nusa Tenggara. The construction is targeted to be completed, before the MotoGP event on this circuit is implemented in 2021. One of the infrastructure related to this, which also really needs to be built to support the smooth running of the 2021 MotoGP is the development of access to the circuit location. The analysis carried out includes the calculation of heavy equipment productivity. Heavy equipment productivity is determined based on cycle times, production per hour, number of heavy equipment used, the amount of operating costs per hour. The analysis was carried out for the road surface layer work, namely the Asphalt Concrete Base Course (AC-BC) work. Based on the results of the analysis, it was found that the production for 1 unit of asphalt mixing plant (AMP) was 49.80 tons/hour and 9 units of dump trucks were 2.34 tons/hour. The spreader using the asphalt finisher can spread 109.18 tons/hour. As for the compactor, which is 18.55 tons/hour for 2 units of tandem rollers and 27.47 tons/hour for 1 unit of pneumatic tire roller. Other equipment is 9.96 m2/hour for air compressor and 2.74 liter/hour for asphalt sprayer. Meanwhile, in the Asphalt Concrete Wearing Course (AC-WC) work, several tools have the same productivity as the AC-BC job, namely asphalt mixing plant, air compressor and asphalt sprayer. Meanwhile, 13 units of Dump Trucks amounted to 2,338 tons/hour, 1 unit of asphalt finisher of 72,787 tons/hour, 3 units of tandem rollers of 12,367 tons/hour, and 1 unit of pneumatic tire roller of 18.31 tons/hour. The total cost of using heavy equipment for road surface layer work is Rp. 4,967,657,344. The total cost based on the contract document is Rp. 5,042,082,622. So that there is a difference in costs of Rp. 74,425,278.

scholarly journals INFLUENCE OF POLYMERIC-DISPERSED REINFORCEMENT ADDITIVES ON THE PERFORMANCE CHARACTERISTICS OF ASPHALT CONCRETE

Vestnik MGSU ◽  
2017 ◽  
pp. 654-660 ◽  
Author(s):  
Sergey Anatolevych Chernov ◽  
Alexander Viktorovich Kaklyugin ◽  
Anna Nykolaevna Nikitina ◽  
Kirill Dmitrievich Golyubyn
Keyword(s):  
Asphalt Concrete ◽  
Residual Deformation ◽  
Road Surface ◽  
Performance Characteristics ◽  
Concrete Mixtures ◽  
Fatigue Failures

The technique and results of the studies of the influence of a polymeric-dispersed reinforcement additive on the performance characteristics of road hot asphalt concrete, namely, its resistance to fatigue failures, rutting and development of residual deformation are described. It is shown that the proposed method of modification of asphalt-concrete mixtures ensures an increase in the durability of layers of pavement road surface.

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