scholarly journals ANALYSIS OF DESIGN AND TECHNOLOGICAL PROCESSES OF HOT RECYCLING ASPHALT MIXTURE AT BATCH ASPHALT MIXING PLANTS

2020 ◽  
Author(s):  
Mindaugas Martišius ◽  
Henrikas Sivilevičius
Keyword(s):  
Raw Materials ◽  
Research Result ◽  
Asphalt Mixture ◽  
Road Construction ◽  
Advantages And Disadvantages ◽  
Baltic Countries ◽  
Road Design ◽  
On The Road ◽  
High Level ◽  
Innovative Techniques

European Union members seek to establish the principles of a circular economy, which is based on the efficient use of raw materials and resources. This requirement will have an impact on business and in particular on the road construction sector. Hence the need to improve the asphalt mixing plant (AMP) mixing technology utilizing as much as possible reclaimed asphalt pavement (RAP) to produce asphalt mixtures (AM) for road construction. The resources used to produce new AM in the world are endless and becoming more expensive in a time scale. The multi-cycle reuse of RAP producing AM is a priority, when thinking about of economical recycling materials usage and the saving of resources. The design and development of RAP hot recycling in-plant technologies has been in progress for approximately half a century. In high-level-economy countries, AM production currently processes on average approx. 80% of the amount of RAP using innovative techniques on AMPs. Design of various AMP, their assessment on the flexible application of innovative techniques depending on the RAP processing method, are described in this paper. In this paper different recycling technologies in AMP and their advantages and disadvantages are reviewed. The research result indicates technical possibilities hot recycling in-plant in Baltic countries. Local authorities, research institutes, road construction and road design companies could use these results in the future.

scholarly journals EFFICIENCY OF REINFORCEMENT OF TECHNOLOGICAL SOIL BY MINERAL MODIFIERS

2019 ◽  
Vol 4 (7) ◽  
pp. 14-23
Author(s):  
Т. Дмитриева ◽  
T. Dmitrieva ◽  
Н. Куцына ◽  
N. Kucyna ◽  
А. Безродных ◽  
...  
Keyword(s):  
Raw Materials ◽  
Road Construction ◽  
Soil Reinforcement ◽  
Production Costs ◽  
Concrete Mixture ◽  
The Road ◽  
Physicomechanical Characteristics ◽  
Advantages And Disadvantages ◽  
Complex Binder ◽  
Technogenic Raw Materials

The paper discusses the main aspects of soil reinforcement in road construction by adding a binder component to them. The use of this technology allows to solve the problem of high-quality raw materials shortage while improving the physicomechanical characteristics or keeping them at the same level, as well as to increase labor productivity and reduce production costs. The technogenic raw materials for the production of soil concrete were studied, the main physicomechanical characteristics and requirements that must be taken into account when selecting the composition of the soil concrete mixture were analyzed. The paper compares the physicomechanical characteristics of the road composite, reveals the advantages and disadvantages of introducing binder components of various types: cement, cement with modifier and a complex binder. It has been established that the introduction of a complex binder or cement with modifier contributes to the improvement of the physicomechanical characteristics while reducing the consumption of cement in the composition of the soil-concrete mixture compared to traditional soil-concrete with cement.

scholarly journals Biofuels as an instrument of Russia hydrocarbons and agrarian exports competitiveness

2020 ◽  
Vol 175 ◽  
pp. 13029
Author(s):  
Denis Ushakov ◽  
Oleg Patlasov
Keyword(s):  
Oil And Gas ◽  
Raw Materials ◽  
Oil And Gas Industry ◽  
Business Value ◽  
Creative Economy ◽  
Gas Industry ◽  
Hydrocarbon Production ◽  
Advantages And Disadvantages ◽  
High Level ◽  
Science Intensity

Paper analyzes the prospects of biofuels second and third generation in the structure of the global energy balance, demonstrates a sharp decline in oil and gas revenues in the Russian budget, describes advantages and disadvantages of biodiesel and bioethanol production. The connection between the growth of Russia’s export potential in terms of hydrocarbon products processing with EU standards implementation has been proved. The problems of the realization of programs on the oxygenate technologies development in the Union State of Russia-Belarus were revealed. The capacity of the market of 3-4 generations fuel with using non-food raw materials and various types of biomass was estimated. Was proved that at a high level of growth in business value and profitability of production there are incentives to organize deep processing in Russia’s hydrocarbon production. It is proved that the oil and gas industry in a creative economy should increase its science intensity and depth of raw materials processing, including ones in related industries.

scholarly journals SERAT ECENG GONDOK SEBAGAI BAHAN ALTERNATIF ADMIXTURE PADA LASTON TIPE XI SNI 03-1737-1989 DITINJAU TERHADAP NILAI-NILAI UJI MARSHALL

Jurnal CIVILA ◽  
2018 ◽  
Vol 3 (2) ◽  
pp. 154
Author(s):  
Errine Yulia Rizqi Intanti ◽  
Zulkifli Lubis
Keyword(s):  
Water Hyacinth ◽  
Asphalt Mixture ◽  
Road Construction ◽  
Flexible Pavement ◽  
The Road ◽  
Concrete Layer ◽  
Wide Range ◽  
On The Road ◽  
Marshall Stability

In Indonesia, the road construction has experienced a fairly good development. From a wide range of road constructions, flexible pavement is the most chosen one because its characteristics: easy, fast, and efficient. However, flexible pavement has many weaknesses, for example the premature damage on the road surface after some time passed by the traffic so that the road cannot reach the planned age. For that, it is done a research to add a hot asphalt mixture material that aims to improve the quality of the mixture results. The selected ingredient is natural water hyacinth. The method used is trial and error with reference of SNI 03-1737-1989. Variations used are 2%, 4%, 6%, 8% and 10% of the asphalt weight, asphalt level used is 5.72 %. Of the 5 variations of mixture used on Type XI Asphalt Concrete Layer, it is obtained the result that the water hyacinth fiber level which has the best score and meet the specifications of SNI 03-1737-1989 is on the percentage of 6% which obtained from calculation data using graphs and regression model where Marshall Stability is equal to 644,46 Kg, flow 3,39 mm, VMA (voids in the mineral aggregate) is equal to 13,83 %, VFWA (voids filled with asphalt) is equal to 65,35%, VIM (voids in the mix) is equal to 2,52 %, density of 2.31 gr/cc, and Marshall Quotient of 164.03 Kg / mm.

Perfection of metal consumption planning at hotextruded pipes production

2021 ◽  
Vol 77 (1) ◽  
pp. 63-69
Author(s):  
D. N. Lysov ◽  
Ya. I. Kosmatskii ◽  
A. A. Tyurin ◽  
E. N. Kondrat’ev
Keyword(s):  
Analytical Method ◽  
Raw Materials ◽  
Hot Extrusion ◽  
Considerable Effect ◽  
Metal Loss ◽  
Pipe Production ◽  
Metal Consumption ◽  
Advantages And Disadvantages ◽  
Functional Capabilities ◽  
High Level

Production of pipes by the method of hot extrusion is characterized by high level of resource capacity and considerable cost of original raw materials. In this connection wastes and metal loss have a considerable effect on the products cost. This factor stipulates the importance of objective and scientifically based planning of metal consumption. Some peculiarities effecting on the level of wastes and metal loss during pipe production at hot extrusion facilities considered. Methodical approaches to planning and assessing metal consumption at the manufacturing of hot-extruded pipes based on the computational and analytical method are outlined. The advantage of using the computational and analytical method of metal consumption rationing was shown. An explanation of the features of the implementation of the computational and analytical method used for modern rationing using information processing systems based on electronic computers is given. The basic materials of the instruction on the rationing of the consumption of ferrous metals at the production of steel pipes, used for a single-stage production scheme, are presented, noting its advantages and disadvantages. The historical aspects of research in the field of rationing of metal consumption at the TMK Group plants considered. A detailed list of literature sources is provided, including corporate materials of TMK Group, used to create programs for metal consumption rationing at the production of hot-extruded pipes at PED-2 of VTZ. The elements of the developed mathematical model used to create a software product are given. The complex of functional capabilities of the program is described, which are necessary for the operative automated calculation of particular consumption coefficients, consumption rates and structure of metal wastes by technological stages. A conclusion is made about the effect of the implementation of the obtained model, expressed in the organization of the process of technical rationing that meets the current requirements. This process of technical rationing makes it possible to establish scientifically and technologically based individual rates of metal consumption, reflecting the objective state of the processes of production of hot-extruded pipes.

scholarly journals International experience of public-private partnership in agriculture

2021 ◽  
Vol 10 (41) ◽  
pp. 160-168
Author(s):  
Tetiana Kolomoiets ◽  
Natalia Galitsina ◽  
Anna Sharaia ◽  
Viktoriia Kachuriner ◽  
Olga Danylenko
Keyword(s):  
Raw Materials ◽  
International Experience ◽  
Public Private Partnership ◽  
Private Partnership ◽  
Normative Documents ◽  
Advantages And Disadvantages ◽  
Legal Method ◽  
Foreign Countries ◽  
High Level ◽  
Constant Improvement

Agriculture, as one of the most important sectors of the economy, needs constant improvement at the legislative level. Its importance lies in providing the population with provisions and obtaining raw materials for industry. States are trying to create a mechanism for regulating agricultural relations that would be in line with international principles and efficient. One such mechanism is the introduction of the institution of public-private partnership. The experience of foreign countries allows to maintain the state of legislative support at a high level and, accordingly, the effective implementation of its norms at a high level for the implementation of state social policy. The work aims to analyze the international experience of public-private partnerships in agriculture. During the research, the authors used such methods as a method of analysis of normative documents, comparative legal method, and formal-legal method. As a result of the study, the international experience of public-private partnership (in general) and in the field of agriculture (in particular) was examined. The historical stages of formation and improvement of this institute are studied. The advantages and disadvantages of public-private partnership and possible ways to improve it are studied.

scholarly journals DEVELOPMENT OF ROAD SURFACE BASED ON LOCAL RAW MATERIALS AND INDUSTRIAL WASTE

2021 ◽  
Vol 58 (3) ◽  
pp. 101-112
Author(s):  
M. M. Titov ◽  
◽  
K.A. Yerimbetov ◽  
Keyword(s):  
Asphalt Concrete ◽  
Power Plants ◽  
Coarse Aggregate ◽  
Raw Materials ◽  
Thermal Power ◽  
Road Construction ◽  
Oil Fields ◽  
Construction Technology ◽  
Expansion Joints ◽  
Advantages And Disadvantages

A review of the literature on the use of thermal power plants (TPPs) in the production of asphalt concrete was conducted. The advantages and disadvantages of asphalt concrete coatings are analyzed. According to experts, the reason lies in the violation of construction technology. And, in principle, the topics of ensuring compliance with construction standards and legislative regulation are among the most relevant in the construction of roads in Kazakhstan.The features of the use of asphalt-resin-paraffin waste from oil fields and ash of the Kyzylorda thermal power plant as part of asphalt concrete in road construction are considered. The construction of the pavement with the use of asphalt concrete based on the composite binder system "Bitumen - asphalt concrete-tar-paraffin waste (ARPW) - TPP ash" has been developed. Due to the stratification of the concrete mixture, the cement milk will be separated from the coarse aggregate, so the upper layer, which experiences the main loads and impacts from the wheels of cars, turned out to be without the main coarse aggregate. This subsequently led to its rapid wear and the formation of a rut. Cement concrete coating with all the positive aspects described below and obvious, and here, too, there are disadvantages of these types of coating, it is not the inability to open traffic immediately after the completion of construction and the need for expansion joints. The author reveals not only the advantages of asphalt concrete coatings, but also the disadvantage of asphalt mixtures in practical use in highways.

Improving the economic efficiency of cattle breeding on 137Cs-contaminated agricultural land

2021 ◽  
pp. 22-28
Author(s):  
Vladimir .Ya. Sarukhanov ◽  
Keyword(s):  
Nuclear Power ◽  
Agricultural Land ◽  
Raw Materials ◽  
Meat Products ◽  
Animal Husbandry ◽  
Advantages And Disadvantages ◽  
Environmentally Safe ◽  
Safe Food ◽  
Livestock Products ◽  
High Level

After the accident at the Chernobyl nuclear power plant, significant territories of Russia, Ukraine, and Belarus were in the zone of radioactive contamination. Agricultural production in territories contaminated with radio-nuclides is advisable only when obtaining environmentally safe products. In order to obtain environmentally safe food products and break-even animal husbandry, especially in ecologically unfavorable territories, it is necessary to intensify production by selecting breeds of cattle, the cultivation of which is most effective for the conditions of a particular region. There are various techniques for reducing the content of 137Cs in beef and milk, each of which has its own advantages and disadvantages. If the use of sorbents requires additional costs, then in the presence of feed slightly contaminated with radio-nuclides, it is possible to obtain livestock products (meat, milk) that meet regulatory indicators without increasing the cost price. The use of sorbents in the production of milk in radionuclide-contaminated areas is advisable if there is processing of dairy raw materials in producing farms. The animals of the Aberdeen-Angus, Simmental meat type and Hereford breeds are the most suitable for beef production in areas contaminated with radio-nuclides. Their breeding, even with a high level of contamination of the diet, will allow you to obtain environmentally friendly meat products.

A REVIEW OF CHEMICAL AND PHYSICAL PROPERTIES OF COCONUT SHELL IN ASPHALT MIXTURE

2016 ◽  
Vol 78 (4) ◽  
Author(s):  
Tay Lay Ting ◽  
Ramadhansyah Putra Jaya ◽  
Norhidayah Abdul Hassan ◽  
Haryati Yaacob ◽  
Dewi Sri Jayanti ◽  
...  
Keyword(s):  
Physical Properties ◽  
Raw Materials ◽  
Agricultural Waste ◽  
Asphalt Mixture ◽  
Road Construction ◽  
Coconut Shell ◽  
Palm Oil Fuel Ash ◽  
X Ray ◽  
Xrf Scanning ◽  
Oil Fuel

Coconut shell is an agricultural waste which is abundant to the environment and also rise the risk to health as well as environment. Currently, most of the researchers are investigate the use of waste material which can reduce the costof construction and increase the strength. Some of thewaste materials are used in construction for instance palm oil fuel ash, rice husk, fly ash slag, sludge, coconut shell and etc. Hence, coconut shellwas selected for this study. Generally, the chemical and physical properties of coconut shell in road construction was highlighted in this paper and compared with others raw materials. In addition, the chemical and physical characteristics of coconut shell was presented according to X-ray Fluorescence (XRF), Scanning Electron Microscopy (SEM),Fourier Transform Infrared Spectroscopy (FTIR) Analysis and X-ray Diffraction (XRD). A review of using coconut shell in asphalt mixture has better potential than others raw materials to constribute in construction field.

scholarly journals A survey: which features are required for dynamic visual simultaneous localization and mapping?

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Zewen Xu ◽  
Zheng Rong ◽  
Yihong Wu
Keyword(s):  
Simultaneous Localization And Mapping ◽  
Dynamic Environments ◽  
Visual Features ◽  
Advantages And Disadvantages ◽  
Intelligent Robots ◽  
Localization And Mapping ◽  
High Level ◽  
Static World ◽  
Robotic Applications ◽  
Significant Attention

AbstractIn recent years, simultaneous localization and mapping in dynamic environments (dynamic SLAM) has attracted significant attention from both academia and industry. Some pioneering work on this technique has expanded the potential of robotic applications. Compared to standard SLAM under the static world assumption, dynamic SLAM divides features into static and dynamic categories and leverages each type of feature properly. Therefore, dynamic SLAM can provide more robust localization for intelligent robots that operate in complex dynamic environments. Additionally, to meet the demands of some high-level tasks, dynamic SLAM can be integrated with multiple object tracking. This article presents a survey on dynamic SLAM from the perspective of feature choices. A discussion of the advantages and disadvantages of different visual features is provided in this article.

scholarly journals Calculation Method of Permanent Deformation of Asphalt Mixture Based on Interval Number

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2116
Author(s):  
Yue Xiao ◽  
Limin Tang ◽  
Jiawei Xie
Keyword(s):  
Interval Analysis ◽  
Calculation Method ◽  
Design Theory ◽  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Design Parameters ◽  
Interval Variable ◽  
Road Design ◽  
Weight Assignment ◽  
Variable Weight

There are great uncertainties in road design parameters, and the traditional point numerical calculation results cannot reflect the complexity of the actual project well. Additionally, the calculation method of road design theory based on interval analysis is more difficult in the use of uncertain design parameters. In order to simplify the calculation process of the interval parameters in the road design theory, the asphalt pavement design is taken as the analysis object, and the permanent deformation of the asphalt mixture is simplified by combining the interval analysis theory. Considering the uncertainty of the design parameters, the data with boundaries but uncertain size are expressed in intervals, and then the interval calculation formula for the permanent deformation of the asphalt mixture is derived, and the interval results are obtained. In order to avoid the dependence of interval calculation on the computer code, according to the interval calculation rule, the interval calculation method with the upper and lower end point values as point operations is proposed. In order to overcome the contradiction between interval expansion results and engineering applications, by splitting the multi-interval variable formulas, the interval variable weights are reasonably given, and the synthesis of each single interval result realizes a simplified calculation based on interval variable weight assignment. The analysis results show that the interval calculation method based on the point operation rule is accurate and reliable, and the simplified method based on the interval variable weight assignment is effective and feasible. The simplified interval calculation method proposed in this paper provides a reference for the interval application of road design theory.

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