scholarly journals Non-autoclaved foam concrete for layers of highways surface dressing

2020 ◽  
Vol 2020 (2) ◽  
pp. 35-41
Author(s):  
Iryna Hornikovska ◽  
◽  
Vadym Kahanov ◽  
Keyword(s):  
Operating Cost ◽  
Road Construction ◽  
Road Surface ◽  
Transport Infrastructure ◽  
Foam Concrete ◽  
Insulating Material ◽  
The Road ◽  
Effective Heat ◽  
Geographical Regions ◽  
Pavement Structure

The article is devoted to the problems associated freeze with the calculated estimation of the parameters of the structural and heat-insulating antifreeze layer in the subgrade of non-rigid roads on various soil bases. The main physical, technical and deformation characteristics of monolithic dispersed non-autoclaved foam concrete reinforced with polypropylene fiber of grades of density from 600 to 1000 kg/m3 are investigated. Freezing of subsoil waters directly under the roadway pavement and, as a result, its increase in volume, leads to significant deformations of the road surface. Under such conditions, the period of defectfree operation of the roadway pavement is significantly reduced, which in turn leads to the need to repair it in a more intensive mode. One of the ways to reduce the operating cost and maintenance costs of the road transport infrastructure is to introduce into the design and construction practice new structural concepts for road surface dressing that ensure high quality pavement during the normative operational period. This can be achieved by introducing an effective heat-insulating material into the pavement structure as an anti-frost layer in order to elimi-nate the effect of frost lift of the roadway pavement of non-rigid roads. Since domestic and foreign experience freeze in the road construction has proven the effectiveness of the use of heatinsulating materials in the road surface dressing construction, in recent years in Ukraine there has been increased interest in the use of non-autoclaved foam concrete as a modern and highly effective heat-insulating material in road construction. The installation of a heat-insulating layer made of non-autoclaved foam concrete allows us to completely or partially prevent freezing or overheating of the surface dressing base, reduce the influence of periodic variations in environmental temperature, which in turn will increase the durability of the pavement structure. The publication presents nomograms for determining the optimal thickness of the heat-insulating anti-frost heavy course (layer) of road surface dressing (based on sand, loamy sand, clay and loam) done at the street and road network for all climatic and geographical regions of Ukraine.

scholarly journals MODERN DEVELOPMENT OF RUSSIA'S ROAD SECTOR: PROBLEMS AND PROSPECTS

2018 ◽  
Vol 6 (1) ◽  
pp. 11-11
Author(s):  
Наталья Борисова ◽  
Natal'ya Borisova ◽  
Елена Егорова ◽  
Elena Egorova ◽  
Александр Борисов ◽  
...  
Keyword(s):  
Economic Development ◽  
Economic Activity ◽  
Road Network ◽  
Road Construction ◽  
Transport Infrastructure ◽  
The Road ◽  
Modern Development ◽  
Socio Economic Development ◽  
The Russian Federation ◽  
Advanced Development

The article considers the most important component of the transport infrastructure - the road infrastructure, which at the same time is one of the most important spheres of economic activity. The socio-economic development of the Russian Federation has been studied, requiring advanced development and modernization of the road network as part of the transport infrastructure of the country and world space, as well as improving the technical level of road construction.

scholarly journals NEURAL FUZZY NETWORK FOR ASSESSING TECHNOLOGICAL SOLUTIONS FOR FOREST ROADS

2020 ◽  
Vol 10 (3) ◽  
pp. 95-103
Author(s):  
Vladimir Pobedinskiy ◽  
Sergey Buldakov ◽  
Andrey Berstenev ◽  
Elena Anastas
Keyword(s):  
Neural Network ◽  
Intelligent Systems ◽  
Information Technologies ◽  
Rapid Assessment ◽  
Road Construction ◽  
Road Surface ◽  
Forest Roads ◽  
The Road ◽  
Logging Roads ◽  
Fuzzy Network

The article is devoted to the problem of improving road construction technologies, in particular, technological solutions for logging roads. As you know, in road construction, the choice and justification of technological solutions for the road surface is one of the first stages of design, the efficiency of which affects further project as a whole, timing and costs of construction. The solution to such a problem is extremely difficult and, first of all, due to the many interrelated parameters, factors, as well as the uncertainties of data in the problem. The task becomes much more complicated when it is also necessary to take into account the economic indicators of road construction project. But it is in this form that it is of the greatest interest, since these characteristics are often the most important in practice. For these reasons, the problem remains completely unsolved. Therefore, requires further research, as noted, taking into account the uncertainties in the problem. Intelligent systems based on the theory of fuzzy sets, neural networks and their hybrid solutions are proposed for this class of problems, as a result of modern achievements in the field of mathematics and information technologies. Thus, the purpose of this research was to develop a neural network for evaluating technological solutions for logging roads. The result of the research was the development of an adaptive neuro-fuzzy network such as ANFIS, which allows calculating the cost of the road surface depending on the main technological and initial financial parameters. The neural network can be recommended for the design of forest roads, as well as for rapid assessment of the effectiveness of various technological solutions during competitive (tender) selection.

scholarly journals Requirements for Pavement Base Layers with Unbound Granular Material

2019 ◽  
Vol 27 (3) ◽  
pp. 21-28
Author(s):  
Silvia Cápayová ◽  
Zuzana Štefunková ◽  
Stanislav Unčík ◽  
Andrea Zuzulová
Keyword(s):  
Climatic Factors ◽  
Road Construction ◽  
Lower Class ◽  
Transport Infrastructure ◽  
Traffic Load ◽  
The Road ◽  
Standards And Regulations ◽  
Pavement Structures ◽  
Pavement Base ◽  
Temperature Water

Abstract Pavement structures, layers, and parameters must meet the strict requirements of applicable standards and regulations. The thickness of layers and the choice of materials depend on the factors involved, i.e., the traffic load and climatic factors (changes in temperature, water, rain, snow); they are also dependent on the geological environment at the road construction site and the parameters and properties of the embankment (the subgrade of the pavement). In some cases, the capacity of the existing transport infrastructure is on the edge of sustainability. The increase in the traffic load and the use of lower-class roads by freight transport, together with insufficient maintenance, has resulted in a deterioration of road conditions, thereby causing many deficiencies and failures. The required serviceability and operational performance of roads can be ensured by the choice of suitable quality materials and technological construction processes. Technologies that are environmentally acceptable and economically efficient should be preferred.

scholarly journals Optimization of the organization of the forest road construction 

2019 ◽  
Author(s):  
А.Х. Мохамед ◽  
Н.А. Тюрин
Keyword(s):  
Operating Cost ◽  
Road Construction ◽  
Construction Sites ◽  
Forest Road ◽  
The Road ◽  
Construction Companies ◽  
The Earth ◽  
Machine Group ◽  
The Cost ◽  
Forest Road Construction

Основной целью работы является оптимизация использования машин для земляных работ в строительстве лесных дорог по критерию минимума приведенных расходов, путем оптимального распределения комплектов машин по объектам строительства при условии возможности аренды какихлибо дополнительных машин. Создана экономикоматематическая модель расчета эффективной структуры парка машин с точки зрения системы производственной эксплуатации, которая складывается из эффектов всех специализированных комплектов машин и эффекта от передачи машин парка в аренду. Учет возможности передачи или получения техники в аренду позволяет улучшить техникоэкономические показатели эксплуатации парка машин. Результаты работы могут быть востребованы лесозаготовительными и дорожностроительными предприятиями в период проектирования производства земляных работ, обновления машинных парков, а также при выборе наилучшего варианта использования имеющегося парка, прогнозирования продолжительности и стоимости ведения механизированных работ. The main purpose of this work is to optimize the earthmoving machinery utilization in the forest road construction, by minimize the operating cost. That goal may achieve by the optimal distribution of the machine combination in the construction sites, with the ability of renting additional machines. Economical mathematical model has been developed for calculating the effective structure of the machine group to achieve the required productivity. The possibility of hire and rent machines allows the manager to improve the technical economic decision for the machines operation. By using the developed model it can gives good results to having better decisions for planning and designing the earth working operations in the road construction companies, renovation of the machine parks, as well as the choosing the best option for using the existing machine combination, predicting the duration and predicting the cost of the whole work.

State and Trends of the Road Goods Transportation Field Development in Ukraine

2019 ◽  
Vol 10 (4) ◽  
pp. 1022
Author(s):  
Liubov KARBOVSKA ◽  
Anna BRATUS ◽  
Olena LOZHACHEVSKA ◽  
Ekaterina ZHELEZNIAK ◽  
Tamara NAVROTSKA
Keyword(s):  
Road Traffic ◽  
Road Construction ◽  
Transport Infrastructure ◽  
Rolling Stock ◽  
Road Transportation ◽  
Safety Control ◽  
Field Development ◽  
Motor Transport ◽  
The Road ◽  
The Eu

The advantages of using motor transport for transportation of goods are substantiated. On the basis of an analysis of the indicators of the volume of transported goods and the turnover of goods of motor transport in a number of countries of Europe (Austria, Great Britain, Spain, Italy, Poland, Finland, France, the Czech Republic, Sweden), reduction of activity in the field of road transportation of goods in 2013 − 2014 and its activation in 2015-2016 are established; in addition, the influence of such negative environmental factors on the activity of road transportation of goods as reduction of the trade turnover of these countries with Russia as a result of the EU sanctions, increasing competition in the road transportation market, and the strengthening of the EU requirements for rolling stock and social guarantees for transportation workers was identified. The statistical data on the volume of transported goods and goods turnover of motor and all types of transport during 2012 − 2017 in Ukraine was explored, and a number of problems were identified that hinder the development of this sphere of activity, the main of which are: low quality of transport infrastructure and, above all, unsatisfactory conditions of road communication lines and corruption in the road construction sector, resulting from inefficient management of the field of activity; low level of safety control as far as road traffic and environmental protection are concerned; environmental pollution by road transport with emissions of harmful gases and transport noise, etc. The basic areas of the development of the sphere of road transportations of goods and of the network of highways are determined.

Analisis Gradasi Penggunaan Material Agregat Base Class A Spesifikasi BinaMarga 2010 Rev 3 Proyek Pelebaran Jalan Sp. Ujung Aji – Batas Kota Kabanjahe

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Brian Baya Sembiring. ST ◽  
Parada Afkiki Eko Saputra, ST,MT
Keyword(s):  
Road Construction ◽  
Analysis Data ◽  
Road Surface ◽  
The Road ◽  
Class A ◽  
On The Road ◽  
Observation Method ◽  
The Right ◽  
The Given ◽  
Filter Analysis

Road is a land transportation infrastructure that covers all parts of the road, including complementary buildings and equipment intended for traffic. Road Structure Improvement is one project that aims to improve the quality of roads. As the object of work to be studied is the widening of the sp. Ujung Aji - Limits of the City of Kabanjahe. Road construction with a flexible layered pavement with cover or without overlays is usually often damaged such as: cracks, hollows, bumps on the road surface. In other conditions it is often seen that the grooves of the former water flow to the subgrade are visible. The situation is more extreme and often occurs, namely the road surface peels to reach the foundation layer, so that the aggregate looks scattered. This study uses the direct observation method in the widening project of Jalan Simpang Ujung Aji - Bts. Kabanjahe City. This research was carried out at the time of laying and compaction of the bottom road foundation layer such as Base B and Base A. Activities carried out included data collection, data processing, analysis and observations in the Laboratory. The results of the filter analysis of rough gradations are good, which is in the middle between the given gradation boundaries, does not coincide and does not come out of the given gradation limit. Based on aggregate filter analysis data, it can be concluded that the results of the gradation of aggregate class A percent are retained and passed the filter in accordance with the general specifications of Bina Marga 2010 revision 3 and according to class A aggregate planning. the specimen is completely waterless, so the weighing results in the right balance.

scholarly journals Quality road surfacing: two stages of control over design concept

2020 ◽  
pp. 99-109
Author(s):  
Aleksey Viktorovich Kamenchukov
Keyword(s):  
Practical Importance ◽  
Road Construction ◽  
Road Surface ◽  
The Road ◽  
Design Concepts ◽  
Efficiency Assessment ◽  
Road Surfaces ◽  
Under Construction ◽  
Key Aspects

This article examines the questions of improving the quality of design concepts on construction and reconstruction of roads. The primary subject of this research is the road surface, the quality of which directly affects the convenience and safety of traffic. The author also assesses the effectiveness of the system “subgrade – road surface” in the conditions of cyclical dynamic load from vehicles and temporal variability of the characteristics of soil ground-geological environment. An overview is conducted on the relevant requirements to engineering of road surface and efficiency assessment of design concepts. The author considers the national and foreign experience of road construction, including modern software  solutions. The two key aspects of selection and efficiency assessment of design solutions are formulated. The article describes the concept, algorithm and results of implementation of comprehensive methodology for assessing efficiency of engineering and construction of road surfaces. Detailed analysis is conducted on the stages of mathematical modeling and effectiveness of the system “subgrade – road surface”. An undisputable scientific novelty of this research consists in application of the modern mathematical apparatus, methods and techniques of linear programming, together with the leading company on the development of software for design and construction of roads. The necessity and practical importance of the elaborated concept on efficiency assessment of design concepts is confirmed by implementation into the practice of road construction. The conclusion is made that the application of integrated index of the effectiveness of construction of road surfaces, coupled with software packages for assessing the stress-deformed condition of soil ground-geological systems, allow eliminated the design errors and ensure maximal reliability and safety of roads under construction of reconstruction.

scholarly journals OBTAINING A THERMAL INSULATION LAYER FROM MONOLITHIC NON-AUTOCLAVED STRUCTURAL AND THERMAL INSULATION FIBRE FOAM CONCRETE

2021 ◽  
Vol 4 (3) ◽  
pp. 5-22
Author(s):  
S. Plehanova ◽  
N. Vingradova
Keyword(s):  
Heat Transfer ◽  
Thermal Insulation ◽  
Road Surface ◽  
Cement Stone ◽  
Insulation Layer ◽  
Foam Concrete ◽  
Joint Work ◽  
The Road ◽  
Road Pavement ◽  
Reinforced Cement

the possibility of obtaining structural and thermal insulation foam concrete of non-autoclave hardening with improved construction and technical characteristics for the device of a thermal insulation layer in the con-struction of road pavement due to three-dimensional dispersed reinforcement with polypropylene fiber is theoretically justified and experimentally confirmed. Based on the results of studies of the influence of technological factors on the properties of foam concrete, the optimal content (up to 0.25% of the cement mass) and the length (12 mm) of reinforcing polypropylene fibers have been established, which allows ob-taining high strength indicators of dispersed-reinforced cement stone for bending (an increase of 12-20%) and compression (an increase of 6-12%) compared with non-reinforced cement stone of non-autoclaved foam concrete. The analysis of the process of structure formation of dispersed reinforced foam concrete from the standpoint of a systematic approach based on multifactorial polynomial models of the influence of the ratio of filler and binder, as well as the number of dispersed reinforcing fibers, which is determined by the optimal conditions for the distribution of solid and gas phases, as well as the reinforcement of adjacent interstitial partitions of foam concrete, linking them into one asociate, which ensures the joint work of the material under various external influences. A method was developed to increase the durability of the road surface and eliminate the influence of the frost heaving effect on the quality of the road surface by intro-ducing the necessary amount of effective thermal insulation layer into the road surface design. The analysis of the regularity of the heat transfer process in the soil mass of the roadbed and multilayer road pavement is carried out. Based on the analysis, the values of the necessary resistance to heat transfer of road pavement for the natural and climatic regions of the country are determined and a method for calculating the value of the thermal insulation (frost-proof) layer of road pavement is proposed. A method was developed for calcu-lating the value of the thermal insulation layer using monolithic fibre foam concrete and a nomogram to de-termine the required value of the thermal insulation layer made of monolithic non-autoclaved structural and thermal insulation fibre foam concrete of classes D600-D1000.

Smart Road Surface Monitoring with Privacy Preserved Scheme for Vehicle Crowd Sensing

2019 ◽  
Vol 16 (8) ◽  
pp. 3204-3210 ◽  
Author(s):  
R. Aishwarya ◽  
R. Yogitha ◽  
V. Kiruthiga
Keyword(s):  
Road Surface ◽  
Transport Infrastructure ◽  
Sensor Technology ◽  
Route Discovery ◽  
The Road ◽  
On Demand ◽  
Transport Services ◽  
Crowd Sensing ◽  
Street View ◽  
Road Condition

In the Modern years many varieties of solutions has been framed for transport infrastructure such as street view application, traffic scrutiny, shortest road path navigation and route discovery. The current requirements and most significant of transport infrastructure has been lead towards the monitoring of road surface condition. Many varieties of solutions have been generated with sensor technology in existing system. Because of this, most of the systems using sensors are getting trouble in existing method for analyzing the condition of road surface and also no awareness or warning for the people who travel for the first time. So that initially visual observe of every surface of the road for the particular areas has been analyzed for a superior solution. Observation can be done by taking site survey, street view applications and also getting suggestion from the highway engineers. Later every detail about the surface of the observed road will be updated with the help of crowd sensing and Global Positioning System (GPS) Vehicle based sensing technology frequently which provides the user-friendly transport services to the customer. In our work the intermediate server called Fog Node is proposed to update the genuine data about the surface of the road condition to the cloud server by applying the Light Weight Signcryption method. The best road condition path for the sensor based cars is to be notified when the car is nearer to the Road Side Unit (RSU) with the help of Global System for Mobile communication (GSM) and also the details will be provided for the client on demand. The implementation can be proved with our proposed method to reach the best path recover, less storage, power consumption and finding proper route discovery. Also, it will dispense on demand data for the road based customers through mobile application with privacy preserved technology.

scholarly journals Performance of Soft Asphalt and Double Otta Seal within First Three Years

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Audrius Vaitkus ◽  
Viktoras Vorobjovas ◽  
Faustina Tuminienė ◽  
Judita Gražulytė
Keyword(s):  
Bearing Capacity ◽  
Road Construction ◽  
Cost Effective ◽  
Transport Infrastructure ◽  
Pavement Roughness ◽  
Gravel Roads ◽  
Travelling Time ◽  
Pavement Distresses ◽  
Pavement Structure ◽  
Resistant Layer

Gravel roads play an important role in the transport infrastructure. However, their maintenance (especially the control of dustiness using chemical dust suppressants) is expensive. Besides, the condition of gravel roads results in low driving comfort, longer travelling time, faster vehicle amortization, and so forth. Typically, these problems are solved by paving gravel roads with asphalt wearing layer. However, north countries practice had shown pavement structure high susceptibility to frost due to insufficient thickness of frost resistance layer. The construction of thicker frost resistant layer increases road construction cost by 25% and, in most cases, there is no need to increase bearing capacity by increasing total thickness of pavement structure. In 2012 19 gravel roads were constructed using cost effective rehabilitation technologies—soft asphalt and double Otta Seal in Lithuania. This paper focuses on those two technologies’ performance within first three years of constructed roads exploitation. The implemented experimental research consisted of three parts by evaluating constructed roads base layers bearing capacity; pavement roughness; and pavement distresses and defects. As a result, the acceptable performance indicators were determined for both technologies—soft asphalt and double Otta Seal. Also recommendations for construction and exploitation improvement were defined.

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