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 Modification of bituminous binders for guss asphalt

2021 ◽  
Vol 274 ◽  
pp. 02011
Author(s):  
Marina Vysotskaya ◽  
Anastasia Kurlykina ◽  
Artem Shiryaev ◽  
Anna Tkacheva ◽  
Dmitry Litovchenko
Keyword(s):  
Asphalt Concrete ◽  
Raw Material ◽  
Structural Defects ◽  
Concrete Pavements ◽  
Self Healing ◽  
Modified Bitumen ◽  
Concrete Mixtures ◽  
Bridge Structures ◽  
Bituminous Binders ◽  
Thermal Stability Of

Over the past few years, the research of the use of cast asphalt concrete mixtures in the upper layers of the coating of bridge structures has been actively carried out. The experience gained allows us to conclude that one of the most common effective ways to improve the durability and thermal stability of cast asphalt concrete pavements is the use of modified bituminous binders. The modified bitumen part of cast asphalt concrete acts as a medium capable of initiating the «self-healing» of the composite, independently eliminating structural defects. This study aims to research the rheological characteristics of modified bituminous binders. Bitumen grade BND 50/70 was used as a raw material in the study; the following types of additives were used as its modifiers: rubber modifier (RM), EVATHERM and SBS. The optimal concentrations of the proposed additives for modification allowing to achieve the effect of structuring the mastic component of cast asphalt concrete with insignificant increases in the temperatures of mixing and compaction of mixtures based on them have been revealed.

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 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.

Study Properties of Road Surface for Foot Pavements and Courtyard Areas

2019 ◽  
Vol 974 ◽  
pp. 325-330
Author(s):  
Natalya B. Kolosova ◽  
Ilya V. Kulish ◽  
Valerii V. Ershov
Keyword(s):  
Surface Area ◽  
Asphalt Concrete ◽  
Road Surface ◽  
Qualitative And Quantitative ◽  
Quantitative Characteristics ◽  
Materials Used ◽  
The Cost ◽  
Qualitative And Quantitative Characteristics

This article presents a study of two most popular materials used for pavement and inside the house territories. Asphalt concrete and concrete paving slabs “Paving stone 7P.8” with dimensions of 200x100x80 mm were chosen as the study objects. Comparison of materials was performed by qualitative and quantitative characteristics. Graphic dependences of the cost of the pavement device of two types on the surface area are built

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 Technology of self-healing road pavements: current status and development prospects

Vestnik MGSU ◽  
2020 ◽  
pp. 1407-1424
Author(s):  
Sergei S. Inozemtcev ◽  
Do Toan Trong
Keyword(s):  
Asphalt Concrete ◽  
Structural Integrity ◽  
Healing Process ◽  
Structural Features ◽  
The Self ◽  
Structural Defects ◽  
Current Status ◽  
Self Healing ◽  
Russian Science ◽  
Properties Of Materials

Introduction. Presently, there exists no unified methodology that could control self-healing properties of materials due to the lack of criteria characterizing the ability of materials to respond to impacts and to cope with adverse effects produced on their properties or structure. All assessment methods applied to self-healing properties of materials are reduced to the calculation of the ratio of relative changes in the value of parameters to be measured. A “self-healing” material is a material capable of initiating liquidation of structural defects, so that the rate of this process could exceed the one of spontaneous propagation of defects, while the resistance of the new structure to operating loads is not lower than the initial one. Development of solutions, capable of implementing this principle, will ensure longer service lives of materials. Materials and methods. A set of general methods of logical research was applied. These methods are based on the theoretical analysis of process solutions presented in professional editions, information resources maintained by their developers and in mass media, patents, research articles and reports. Results. The self-healing technology is applicable to asphalt concrete with regard for its structural features and thermoplastic properties. Self-healing means restoration of the structural integrity of physical and chemical bonds by moistening crack surfaces, diffusion of molecules between them, and arbitrary dissipation of molecules to ensure reinforcement. Self-healing process uniformity is attainable by applying the technology of functional agent encapsulation so that it could be added to the mix along with other components at the stage of the asphalt concrete mix preparation. Conclusions. Existing technological solutions can generate capsules that contain the recovery agent in the amount of up to 90…94 % of the total volume. General requirements and quality standards that apply to self-healing materials, used in construction, must be developed to identify their efficiency depending on application conditions. Provisions of the adhesion theory can be applied to the self-healing technology in the course of its implementation. The study was funded by the grant from the Russian Science Foundation (Project No. 19-79-00262).

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