scholarly journals Ensuring the shear resistance of asphalt mixtures in the pavement of highways

2018 ◽  
Vol 5 (3) ◽  
Author(s):  
Zelgedin Mevlidinov ◽  
Tatiana Levkovich ◽  
Anastasia Bilсko
Keyword(s):  
Carbon Black ◽  
Asphalt Concrete ◽  
Residual Deformation ◽  
Shear Resistance ◽  
The State ◽  
Shear Stresses ◽  
Concrete Mixtures ◽  
Concrete Mix ◽  
Used Car ◽  
The Impact

Studying the state of the issue on the shear resistance of asphalt concrete mixtures in the pavement, the authors reviewed the currently available technical reference literature. The state of the streets of the city of Bryansk and the highways of the Bryansk region by measuring the depth of the tracks and flows was also examined. The asphalt concrete samples were tested in laboratory conditions taking into account the rate of deformation, temperature and stress-strain state using the device manufactured at the Department of «Highways» of the Bryansk state engineering and technological University. As additives in asphalt concrete mix introduced: rubber crumb from used car tyres, wheels automobiles, carbon black (powder form) and definiltely thermoplastics. The conducted researches on samples of asphalt concrete mix with use of divinyl-styrene thermoplastics (DST) showed that at increase in the polymer content from 2 to 5 % there was some increase in durability of asphalt concrete on tension in 1,06…1,16 times at 0 °C (smaller value corresponds to the smaller number of DST). Compressive strength at a temperature of «plus» 50 °C increased by 1.04…1.08 times and the module of residual deformation at «plus» 50 °C increased by 1.18…1.23 times. In General, with an increase in the content of DST from 2 to 5 %, the shear resistance increased almost 1.27 times (with the introduction of 5 % DST over the mass of bitumen). The conducted research allows to conclude that to reduce the impact of shear stresses in asphalt concrete mixtures it is necessary to introduce modifying additives, the properties of asphalt concrete depend on the presence of additives, as well as on the quality of the stone aggregate, bitumen and other materials. With the introduction of certain additives (DST, carbon black, rubber c hips), the shear resistance of asphalt concrete increases.

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 of the influence of the efficiency of application of asphalt concrete reinforced by basaltic fiber

2021 ◽  
Vol 2021 ◽  
pp. 117-128
Author(s):  
Artur Onyshchenko ◽  
◽  
Mykola Garkusha ◽  
Oleksandr Fedorenko ◽  
Yevgen Plazii ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Asphalt Concrete ◽  
Materials Science ◽  
Shape Change ◽  
Construction Materials ◽  
Basalt Fiber ◽  
Physical And Mechanical Properties ◽  
Operating Conditions ◽  
Concrete Mix ◽  
The Impact

Introduction. Increasing the load on highways and constantly increasing the intensity of traffic requires the use of road construction materials with improved physical and mechanical properties. Asphalt concrete is one of the most common and effective materials, which allows to provide the necessary strength and durability of the pavement structure. However, the use of traditional materials for its preparation - mineral material and road bitumen has a limited resource, which does not always meet traffic conditions. Modern scientific research in materials science allows to use mixtures of asphalt concrete and asphalt concrete road with the use of basalt fiber.Apply mixtures of asphalt concrete and asphalt concrete road with the use of basalt fiber, allows to increase the mechanical characteristics - tensile strength and resistance to fatigue from repeated loads, which increases the crack resistance of asphalt concrete layers of pavement structures, as well as increases resistance to shape change. accumulation of residual deformations.Problem Statement. From the literature analysis it is established that the coating of non-rigid pavement is in difficult operating conditions, which is confirmed by the intensive growth of defects in the form of tracks, landslides, inflows, cracks, due to increasing parameters of transport loads and high summer temperatures, so there is a need new materials.Purpose. Is to study the impact of the effectiveness of asphalt concrete reinforced with basalt fiber.Results. The results of physical and mechanical properties of asphalt concretes with the use of basalt fiber are obtained. The results of formation of residual deformations in the form of track in asphalt concrete with the use of basalt fiber are obtained. As a result of the conducted researches the analysis of efficiency of application of basalt fiber in asphalt concrete mix is executed.On the basis of the carried-out researches the basic requirements to asphalt concrete mix with use of basalt fiber are establishedConclusions. The research results were used in the development of regulations for the design, construction and repair of asphalt layers of roads in Ukraine.Keywords: asphalt concrete road with basalt fiber, asphalt concrete mixes with basalt fiber, loading, covering, stability, temperature.

scholarly journals Recovery of the bitumen and asphalt concrete properties with rejuvenator

2021 ◽  
pp. 6-17
Author(s):  
Yan Pyrig ◽  
Andrii Galkin ◽  
Serhii Oksak ◽  
Yaroslav Ilin ◽  
Yana Shyika
Keyword(s):  
Quality Indicators ◽  
Asphalt Concrete ◽  
Road Maintenance ◽  
Adhesion Properties ◽  
Concrete Mixtures ◽  
Road Section ◽  
Standard Quality ◽  
The Impact ◽  
Main Factor

The main factor in the decreasing in the quality of asphalt concrete with time is thehardening of the bituminous binder, which occurs under the influence of high environmentaltemperatures, moisture and oxygen. Considering this, one of the ways to extend the service life ofasphalt pavements isto implement procedures to prevent deterioration of the properties of bituminousbinders, which occurs due to its hardening. To solve the problem of hardening, the use of variousrejuvenators becomes widespread in road maintenance around the world. The aim of the researchwork is to analyze the effect of the domestic rejuvenator Lux «ЕD-L» on the properties of roadbitumen and asphalt concrete made with this binder. The effect of the rejuvenator on the propertiesof bitumen is evaluated in three ways: finding the influence of Lux «ЕD-L» on the properties of theoriginal bitumen; finding the ability to restore the properties of RTFOT-hardened bitumen by addingan additive to the hardened binder; finding the effect on the intensity of hardening by hardening ofbitumen, which includes the Lux «ЕD-L» additive in its composition. In addition, according to thisscheme, it is evaluating the effect of the rejuvenator on asphalt concrete mixtures, which areconditioned according to the method of AASHTO R 30-02. Based on the obtained experimental data,it is found that the modification of the RTFOT-hardened bitumen with Lux «ЕD-L» additive improvesbinder’s properties, which results in the returning of the values of standard quality indicators(penetration, softening point and breaking point temperatures) to the initial level of values quality ofbitumen before hardening. Lux «ЕD-L» additive significantly improves the adhesion properties ofbitumen (both original and aged). Evaluation of the impact of the rejuvenator on the properties ofasphalt mixtures after conditioning confirmed its effectiveness. The properties of asphalt concrete made from mixtures after conditioning, which were treated with the Lux «ЕD-L» additive, accordingto obtained quality indicators is equal to the asphalt concrete with the original bitumen. A field testof the effect of the Lux «ЕD-L» additive on the properties of the asphalt pavement is in process. Theresults of field test will be obtained after 3 and 9 months of operation of the treated road section.

scholarly journals Monitoring Micro Crack Healing Phenomena in Recycled Asphalt Concrete

2020 ◽  
Vol 1 (4) ◽  
pp. 1-6
Author(s):  
Saad Issa Sarsam
Keyword(s):  
Service Life ◽  
Carbon Black ◽  
Asphalt Concrete ◽  
Permanent Deformation ◽  
Styrene Butadiene Rubber ◽  
Shear Stresses ◽  
Crack Healing ◽  
Recycling Process ◽  
Recycled Asphalt ◽  
Testing Techniques

Asphalt concrete usually practices cracking and distress during its service life. However, recycling process as well as crack healing phenomena can enhance the physical properties and extend the pavement service life. This investigation is concerned with monitoring the microcrack healing of recycled asphalt concrete through its influence on deformation measurement under three testing techniques, repeated (compressive, tensile and shear stresses). Reclaimed asphalt concrete mixture was recycled with [carbon black-asphalt] and [Styrene Butadiene Rubber (SBR)-asphalt] rejuvenators. Specimens have been tested with the aid of the pneumatic repeated load system (PRLS). The repeated loading of the three testing techniques was terminated after 1000 load repetitions, and the specimens could heal by external heating at 60°C for 120 minutes. Specimens were returned to the (PRLS) and subjected to another run of repeated stresses application after healing. It was concluded that the deformation increases after recycling process while it declines after microcrack healing regardless of the testing technique adopted. The deformation declines by (31.8, 5.8 and 19)%, (43 ,49 and 24 )% and (44 ,10 and 13 )% under three level of repeated compressive stresses of (0.068, 0.138, and 0.206) MPa at (40 °C) after healing cycle for reclaimed and recycled mixture with (carbon black-asphalt) and (SBR-asphalt) respectively when compared with permanent deformation before the healing cycle. The permanent deformation under repeated punching shear and indirect tensile stresses declines after microcrack healing by (32, 26 and 25.7) % and (73, 78.7 and 78.2) % for reclaimed, recycled with (carbon black-asphalt) and recycled with (SBR-asphalt) mixtures respectively.

Russia - European Union: The continuation ofthe sanctions standoff

2017 ◽  
pp. 114-127
Author(s):  
M. Klinova ◽  
E. Sidorova
Keyword(s):  
European Union ◽  
Economic Recession ◽  
Economic Sanctions ◽  
Current Data ◽  
The State ◽  
The European Union ◽  
The Impact ◽  
The Eu ◽  
Year 2013

The article deals with economic sanctions and their impact on the state and prospects of the neighboring partner economies - the European Union (EU) and Russia. It provides comparisons of current data with that of the year 2013 (before sanctions) to demonstrate the impact of sanctions on both sides. Despite the fact that Russia remains the EU’s key partner, it came out of the first three partners of the EU. The current economic recession is caused by different reasons, not only by sanctions. Both the EU and Russia have internal problems, which the sanctions confrontation only exacerbates. The article emphasizes the need for a speedy restoration of cooperation.

PERTANGGUNGJAWABAN KERUGIAN NEGARA DALAM PENGELOLAAN KEUANGAN DAERAH

EDUKASI ◽  
2018 ◽  
Vol 16 (1) ◽  
Author(s):  
Hendra Karianga
Keyword(s):  
Financial Management ◽  
Criminal Liability ◽  
The State ◽  
Legal Proceedings ◽  
Regional Finance ◽  
Regional Budget ◽  
State Finance ◽  
Budget Policy ◽  
Definition Of ◽  
The Impact

Sources of revenue and expenditure of APBD (regional budget) can be allocated to finance the compulsory affairs and optional affairs in the form of programs and activities related to the improvement of public services, job creation, poverty alleviation, improvement of environmental quality, and regional economic growth. The implications of these policies is the need for funds to finance the implementation of the functions, that have become regional authority, is also increasing. In practice, regional financial management still poses a complicated issue because the regional head are reluctant to release pro-people regional budget policy, even implication of regional autonomy is likely to give birth to little kings in region causing losses to state finance and most end up in legal proceedings. This paper discusses the loss of state finance and forms of liability for losses to the state finance. The result of the study can be concluded firstly,  there are still many differences in giving meaning and definition of the loss of state finace and no standard definition of state losses, can cause difficulties. The difficulty there is in an effort to determine the amount of the state finance losses. The calculation of state/regions losses that occur today is simply assessing the suitability of the size of the budget and expenditure without considering profits earned by the community and the impact of the use of budget to the community. Secondly, the liability for losses to the state finance is the fulfillment of the consequences for a person to give or to do something in the regional financial management by giving birth to three forms of liability, namely the Criminal liability, Civil liability, and Administrative liability.Keywords: state finance losses, liability, regional finance.

Financial and monetary policy of the State and its impact on the income level and poverty reduction in Russia

2020 ◽  
Vol 26 (5) ◽  
pp. 964-990
Author(s):  
N.I. Kulikov ◽  
V.L. Parkhomenko ◽  
Akun Anna Stefani Rozi Mobio
Keyword(s):  
Monetary Policy ◽  
Household Income ◽  
Poverty Reduction ◽  
The State ◽  
Financial Policy ◽  
Gdp Growth ◽  
Tax Rate ◽  
Gdp Growth Rate ◽  
The Government ◽  
The Impact

Subject. We assess the impact of tight financial and monetary policy of the government of the Russian Federation and the Bank of Russia on the level of household income and poverty reduction in Russia. Objectives. The purpose of the study is to analyze the results of financial and monetary policy in Russia and determine why the situation with household income and poverty has not changed for the recent six years, and the GDP growth rate in Russia is significantly lagging behind the global average. Methods. The study employs methods of analysis of scientific and information base, and synthesis of obtained data. The methodology and theoretical framework draw upon works of domestic and foreign scientists on economic and financial support to economy and population’s income. Results. We offer measures for liberalization of the financial and monetary policy of the government and the Central Bank to ensure changes in the structure of the Russian economy. The proposed alternative economic and financial policy of the State will enable the growth of real incomes of the population, poverty reduction by half by 2024, and annual GDP growth up to 6 per cent. Conclusions. It is crucial to change budget priorities, increase the salaries of public employees, introduce a progressive tax rate for individuals; to reduce the key rate to the value of annual inflation and limit the bank margin. The country needs a phased program to increase the population's income, which will ensure consumer demand.

The impact of business tourism clustering on the regional economy's development: A Greater Moscow case study

2020 ◽  
Vol 18 (7) ◽  
pp. 1397-1414
Author(s):  
K.S. Golondarev
Keyword(s):  
Multivariate Analysis ◽  
The State ◽  
Investment Climate ◽  
Private Investors ◽  
The Impact

Subject. This article explores the issues of business tourism clustering in Greater Moscow. Objectives. The article intends to justify the need to create a business tourism cluster in Greater Moscow to improve the investment climate in the region. Methods. For the study, I used a multivariate analysis, forecasting, and extrapolation. Results. The article shows a certain relationship between the efficient functioning of the business tourism cluster and the economy's development. Conclusions and Relevance. Certain types of tourist clusters can serve as platforms for attracting investors and implementing marketing plans. The business tourism cluster is a link between buyers and sellers in various industries. The results of the study can be used to improve the effectiveness of the cluster initiative in business tourism, as well as find ways of cooperation between the State and private investors when creating the business tourism cluster in Greater Moscow.

A PROPOSED EVALUATION PLAN TO ASSESS THE IMPACT OF A YOUTH DEVELOPMENT PROGRAMME FACILITATED BY THE STATE INFORMATION TECHNOLOGY AGENCY (SITA) IN RURAL SOUTH AFRICA

2017 ◽  
Vol 14 (1) ◽  
pp. 174-181
Author(s):  
Maura Mbunyuza-deHeer Menlah
Keyword(s):  
Information Technology ◽  
Youth Development ◽  
Rural Areas ◽  
Secondary Data ◽  
The State ◽  
State Information ◽  
Evaluation Plan ◽  
Lessons Learnt ◽  
Slow Development ◽  
The Impact

This article reports on a proposed evaluation plan that has been developed to assess the work done by the State Information Technology Agency (SITA). The SITA programme was implemented in response to the South African government’s call to improve the lives of the populations in some rural areas through technology. The programme was meant to address slow development in  rural  areas  that  lack  technological  innovations  and  advances.  In  the proposed evaluation plan a review is made of secondary data, deciding how strategic priorities are to be determined, as well as analysis of the rural context environment. The researcher gives an account of how the evaluation strategies are to be piloted and rolled out thereafter. Lessons learnt are recorded and reported upon. A proposed evaluation plan will be developed, based on the lessons learnt in line with the objectives of the project.

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