scholarly journals Heat setting system development of bridge floor surface using low temperature geothermal energy

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Sergey Kostenko ◽  
Aleksandr Piskunov ◽  
Nikita Ganin
Keyword(s):  
Low Temperature ◽  
Geothermal Energy ◽  
Control Method ◽  
Heat Setting ◽  
Difficult Situation ◽  
Best Available Technologies ◽  
The Road ◽  
Floor Surface ◽  
Study Results ◽  
On The Road

Multilevel transport interchanges play a decisive role in the road infrastructure both throughout the world and in Russia. Significant problems of the safe operation of multi-level highways in the general metropolitan traffic system and the country territory, in general, are associated with the need to thoroughly clear them of snow and ice during winter and off-season periods. The simplest, most obvious, and historically proven non-mechanical ice control method is using the chemical reagents mixtures. Despite the fact that the quality of the original anti-ice chemical products is constantly being improved, the reagents composition is updating, the target operation remains unchanged — a decrease in the ice and snow melting temperature point. Unfortunately, in the process of melting with heavy snowfall, the concentration and, accordingly, the brine viscosity increases, leading to «oiling» of the asphalt pavement, thereby worsening the already difficult situation on the road. One of the attractive ways to keep the roadway in proper condition is to heat it to get rid of ice. Direct heating methods such as central heating or electric heating are too costly and economically unfeasible. It seems promising to use low-temperature geothermal energy, which will significantly reduce energy costs and increase the transport projects’ economic attractiveness. This work is devoted to the study of the practical applicability of the bridge floor surface heat setting technology using low-temperature geothermal energy as part of the «Best available technologies» concept implementation in accordance with GOST R 56828.15-2016 in terms of infrastructure facilities energy efficiency. Based on the work results, the authors provide the study results and numerical modeling, as well as their comparison. The results presented in this article are a part of the dissertation research «New technological solutions development for the bridge floor surface at transport interchanges» Kostenko S.А.

scholarly journals Setting up the braking force measurement system of the tractor semi-trailer

2021 ◽  
Vol 9 (4) ◽  
pp. 415-424 ◽  
Author(s):  
Nguyen Thanh Tung
Keyword(s):  
Measurement System ◽  
Force Measurement ◽  
Average Error ◽  
Dynamics Model ◽  
The Road ◽  
Study Results ◽  
Braking Force ◽  
On The Road ◽  
Force Measurement System ◽  
Braking Dynamics

The braking force of the tractor semi-trailer depends on many random factors and road parameters. Therefore, determining the braking force based on theoretical calculation or simulation is not accurate. This paper presents the method of setting up the braking force measurement system of the tractor semi-trailer on the road and constructing the braking dynamics model of the tractor semi-trailer to investigate the braking force using Matlab-Simulink software. The study results show that the average error between the simulation and experimental results of the tractor semi-trailer braking force is 9,81%.

scholarly journals Estimating the influence of double-sided rounded screens on the acoustic field around a linear sound source

2021 ◽  
Vol 3 (5 (111)) ◽  
pp. 38-46
Author(s):  
Vitalii Didkovskyi ◽  
Vitaly Zaets ◽  
Svetlana Kotenko ◽  
Volodymyr Denysenko ◽  
Yuriy Didenko
Keyword(s):  
Acoustic Field ◽  
Cross Sections ◽  
Sound Source ◽  
Finite Thickness ◽  
Sound Field ◽  
Algebraic Equations ◽  
The Road ◽  
Study Results ◽  
On The Road ◽  
The Impact

This paper reports a study into the acoustic field of transport flow around noise protection screens located on both sides of the sound source. Most research on noise protection involving noise protection screens relates to the assessment of the effectiveness of screens located on one side of the noise source. The influence of the second screen on the effectiveness of the first one has been investigated only experimentally. Therefore, it is a relevant task to assess the mutual impact of the two screens between which the linear sound source is located. A problem was stated in such a way that has made it possible to derive an analytical solution and find a sound field around a linear sound source. In this case, the sound source was limited on both sides by acoustically rigid screens with finite thickness. The screens' cross-sections were shaped as part of a ring with arbitrary angles and the same radius. The problem was solved by the method of partial domains. This method has made it possible to obtain an infinite system of algebraic equations that were solved by the method of reduction. Such an approach to solving a problem allows a given solution to be applied for different cases of the mutual location of screens, source, and territory protected from noise. The study results help estimate a field between the screens, the dependence of increasing sound pressure on the road on the geometric size of the screen and the width of the road. In addition, the solution resulted in the ability to assess the impact of one screen on the efficiency of another in the frequency range of up to 1,000 Hz. It has been shown that the mutual impact of screens could reduce the screen efficiency by 2 times. The study reported here could make it possible to more accurately calculate the levels of the sound field from traffic flows when using noise protection screens, which is often performed in practice when designing new and reconstructing existing highways.

scholarly journals Analysis factors affecting formation on the clutch durability between asphalt-concrete layers of road clothing

2021 ◽  
pp. 26-31
Author(s):  
Liydmyla Levkivska ◽  
◽  
Jafar Musa Elallak
Keyword(s):  
Asphalt Concrete ◽  
Complex Analysis ◽  
Physical And Mechanical Properties ◽  
Difficult Situation ◽  
Factors Affecting ◽  
Operational Conditions ◽  
The Road ◽  
Number Of Factors ◽  
Literary Sources ◽  
On The Road

This article reflects the importance of the road network for the social development of society and the development of the economy of the country as a whole. On the basis of literary sources provides complex analysis of roads in Ukraine, their current functional state and tendencies of development. It is established that the road industry is in a rather difficult situation due to unsatisfactory transport and operational conditions of the vast majority of Ukrainian roads. Construction of new roads is extremely rare because of lack of financial resources. Road works are usually carried out to preserve the network of already existing roads and to ensure their necessary transport and operational status. According to the results of the analysis, one of the main reasons for the premature destruction of newly constructed or repaired non-rigid pavements is the low strength of interlayer adhesion in the contact area of the newly covered material with the layer below. The effect of clutch durability between asphalt layers on the road strength has been studied in detail. A number of factors that affect the quality of clutch durability between layers are analyzed. It is established that in order to ensure the strength of grafting between asphalt concrete layers of road clothing, it is necessary to strictly observe the technological regimes of their laying, above all temperature; to take into account the physical and mechanical properties of materials at the construction stage and the influence of climatic and mechanical factors, or most often their complex effect on the operation of the highway.

Evaluation of Polymer-Modified Warm-Mix Asphalt Used for Gobi Road

2013 ◽  
Vol 723 ◽  
pp. 320-327
Author(s):  
Yong Joo Kim ◽  
Sung Lin Yang ◽  
Yeong Min Kim ◽  
Sung Do Hwang ◽  
Soo Ahn Kwon ◽  
...  
Keyword(s):  
Low Temperature ◽  
Heavy Traffic ◽  
Asphalt Binder ◽  
Weather Condition ◽  
Warm Mix Asphalt ◽  
Bending Test ◽  
Test Results ◽  
The Road ◽  
Polymer Modifier ◽  
On The Road

South Gobi road of 240-km flexible pavement was constructed from UKHAA KHUDAG to GASHUUN SUKHAIT in South Gobi, Mongolia in 2011. However, due to the heavy traffic and severe weather condition, early distresses have occurred from a length of 100-km flexible pavements in South Gobi road after one year service life. In order to enhance crack and rutting resistances and to improve paving quality control in South Gobi road, polymer modifier is selected to reduce rutting at high temperature and cracking at low temperature and warm-mix asphalt (WMA) additive is selected to reduce the mixing and compacting temperatures and provide better compaction on the road and the ability to haul paving mix for longer distances. This paper adopted comprehensive asphalt tests to evaluate physical and rheological characteristics, and crack potential at low temperature for use in a South Gobi road. Laboratory tests were performed on asphalt binder with a polymer modifier and warm-mix asphalt additive by conducting the following tests: softening test, ductility test, SuperpaveTMtest and cold bending test. These test results of asphalt binder with SBS polymer modifier and warm-mix asphalt additive were significantly more positive than those of typical asphalt binder. On the basis of test results, it can be concluded that the asphalt binder with SBS polymer modifier and WMA additive is stronger and less susceptible to rutting and crack than typical asphalt binder used in South Gobi.

Brushless Motor and Wireless Recharge System for Electric Vehicle Design Modeling and Control

2021 ◽  
pp. 338-362
Author(s):  
Mohamed Naoui ◽  
Flah Aymen ◽  
Ben Hamed Mouna ◽  
Lassaad Sbita
Keyword(s):  
Electric Vehicle ◽  
Control Method ◽  
Storage System ◽  
Modeling And Control ◽  
The Road ◽  
Brushless Motor ◽  
Received Power ◽  
On The Road ◽  
And Control ◽  
The Relationship

This chapter deals with the problem of energy storage inside an electric vehicle. The main source of energy is based on a wireless system. This recharge tool regroups inside several components as the storage system, which consists of an ensemble of batteries and serving as the main power source, a special electronic converter that is based on the buck-boost principle and a coil receiver placed undo the vehicle. From the other side, one or more than coil transmitters are placed on the road, where the vehicle is. Modeling all of these components and expressing their mathematical models seems interesting for defining the possible control method that can guarantee a high autonomy when the vehicle is moving. So, taking into account if the care is driving or stopped, this recharge system is studied for verifying the effectiveness of this recharge system and showing the relationship between the vehicle situation and the quantity of received power. Using the platform Matlab/Simulink the results were shown and discussed.

The Effect of Steel Fiber on the Road Performence of Asphalt Concrete

2014 ◽  
Vol 584-586 ◽  
pp. 1342-1345 ◽  
Author(s):  
Jie Fei Guo
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Asphalt Concrete ◽  
Steel Fiber ◽  
Heavy Traffic ◽  
Reference Value ◽  
Bending Test ◽  
The Road ◽  
Splitting Test ◽  
On The Road

In order to solve the problems relevant to asphalt concrete,such as cracking in low temperature, bleeding in high temperature and water damage,this paper put forward the ideal incorporation of steel fiber with asphalt concrete to reinforce the pavement performance and service life.By analyzing the test results such as rutting test, low temperature bending test,freeze-thaw splitting test and comparing with the stability in high temperature, anti-cracking performance in low temperature and the water stability between steel fiber asphalt concrete and the ordinary asphalt concrete,we can conclude that adding steel fiber with asphalt concrete can significantly improve the performance of road.This paper has reference value for choosing asphalt pavement in areas of low temperature and heavy traffic.

Study on the Effect of Warm Mix Modifiers on the Performance of Guss Asphalt

2014 ◽  
Vol 488-489 ◽  
pp. 554-557
Author(s):  
Xing Song Cao ◽  
Dong Wei Cao ◽  
Yi Fei Wu ◽  
Xio Qiang Yang ◽  
Shi Xiong Liu
Keyword(s):  
Low Temperature ◽  
Bending Test ◽  
Test Results ◽  
Low Carbon ◽  
The Road ◽  
Road Performance ◽  
On The Road ◽  
Track Test ◽  
Better Than ◽  
Low Carbon Emission

In order to comparatively study the effect of warm mix modifiers on the road performance of guss asphalt, the guss asphalt mixtures, whose asphalt aggregate ratio were 8.5%,9.0%,9.5% respectively, were mixed with 0%,1%,2%,3% of the RH and Sasobit warm mix modifiers. Then by means of Lueer test, penetration test, wheel track test and low-temperature bending test, the performance of guss asphalt were evaluated. The test results show that: RH and Sasobit can effectively improve the workability of guss asphalt; RH is better than Sasobit in reducing viscosity of guss asphalt; RH reduces the high-temperature properties of guss asphalt; On the contrary, Sasobit can improve the hightemperature performance of guss asphalt; RH and Sasobit have an adverse impact on the crack resistance of guss asphalt in low temperature, so their content should not too high. Guss asphalt has characteristics of high construction temperature and energy consumption. In order to reduce construction temperature, based on energy conservation, low-carbon emission environment, reduce the aging of asphalt principle, warm modifiers could be used to reduce the viscosity of guss asphalt at high temperatures[1-5]. Sasobit modifiers imported from Germany are used much more to improve the workability of guss asphalt. In this paper, 0%, 1%, 2%, 3% RH and Sasobit warm mix modifier were mixed with the aggregate ratio of 8.5%, 9.0%, and 9.5% of the Guss asphalt to compare and analyzed the performance of those two warm modifiers on Guss asphalt.

scholarly journals On the road to low temperature district heating

2019 ◽  
Vol 1398 ◽  
pp. 012002 ◽  
Author(s):  
Adam Cenian ◽  
Mieczysław Dzierzgowski ◽  
Bartosz Pietrzykowski
Keyword(s):  
Low Temperature ◽  
District Heating ◽  
The Road ◽  
On The Road

Study on Low-Temperature Performance of Asphalt Mixture Impacted by Modified Asphalt and Polyester Fibers

2012 ◽  
Vol 204-208 ◽  
pp. 3886-3889
Author(s):  
Xun Yu ◽  
Jing Bo Huang
Keyword(s):  
Low Temperature ◽  
Crack Resistance ◽  
Strain Energy ◽  
Failure Strain ◽  
Asphalt Mixture ◽  
Modified Asphalt ◽  
The Road ◽  
On The Road ◽  
Fracture Stiffness ◽  
Sbs Modified Asphalt

Low temperature crack plays an important role on the road safety and comfort. Indoor experiments were carried out to study the crack resistance of asphalt mixture. The results show that: fiber and SBS modified asphalt can increase the failure strain energy, the failure stress and the failure strain and reduce stiffness, thus can significantly improve the anti-cracking ability at low temperature; at a critical temperature of about -10°C, the splitting strength achieve a peak value correspondingly, and the asphalt mixture transforms from the viscoelastic status to the brittle status; the failure load and the failure strain of the three kinds of mixtures are in the sequence of modified asphalt mixture> fiber mixture> common asphalt mixture; the results of the J-integral strain energy test show that fiber asphalt mixture has the maximum resistance curve slope, which means it may have better anti-cracking ability than the SBS modified asphalt mixture; the fracture stiffness can be introduced to effectively evaluate the crack resistance of asphalt mixture.

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