ASSESSMENT OF ROAD CONSTRUCTION EFFICIENCY
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Ph. D. (Tech.) D.M. Nemchinov
Joint Stock Company
«Center of rate setting and cost estimate in constraction»
Contact information: ndmdom@yandex.ru;
+7(916)184-96-59 - Abstract: The article dwells upon the issue of economic effect from road system development, including macroeconomic aspects, as well as benefits for road users.
- Keywords: road system, economic efficiency, economy, construction.
- UDC: 625.7
- File: Download
PROFESSIONAL STAFFING RESOURCES EVALUATION FOR ROAD CONSTRUCTION
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Ph. D. (Tech.) R.V. Kargin
(Rostov State Transport University),
Student D.R. Kargina
(Academy of Civil Engineering and Architecture – Don State Technical University)
Contact information: kargin-r-v@mail.ru - Abstract: The article deals with the current situation of high-qualified professionals producing for the road construction sector in Russia during last 20 years. The results of comparative analysis of road and transport higher education institutions number with federal district indexes including ones characterizing road system are presented. Future analysis directions are determined, problems of quantitative evaluation of next-generation higher education professionals of road-transport specialty are also pointed out.
- Keywords: road, road construction, federal district, federal subject, higher education, higher education institution, skills direction and profile.
- UDC: 625.7/.8
- File: Download
ANALYSIS OF THE SPHERE OF APPLICATION OF SATELLITE TECHNOLOGIES AND THEIR INFLUENCE ON INCREASING ROAD SECTOR EFFICIENCY
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Doctor of Economics, Professor E.V. Dinges,
Postgraduate Student Looor Angel Osvaldo,
(Moscow Automobile and Road Construction State Technical University (MADI))
Contact information: dinges@inbox.ru - Abstract: The article deals with the expediency of development of satellite technologies applications in road sector taking into account not only direct effects, but also indirect ones from their implementation.
- Keywords: roads, road sector, direct and indirect effects, satellite technologies, efficiency from implementation.
- UDC: 625.7/.8:629.783
- File: Download
CALCULATION METHODOLOGY OF FALLING SLOPE ANGLE USING OF REDUNDANT FIGURES METHOD WHEN DESIGNING PROTECTIVE POLYURETHANE BONDED AGGREGATE LAYERS
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Engineer V.Yu. Leontiev
(Joint-stock company «OrgSintezResurs»),
Doctor of Engineering, Professor
A.V. Kochetkov,
Ph. D. (Tech.), Associate Professor
L.V. Yankovsky,
Postgraduate Student V.Yu. Zadvornov
(Perm National Research Polytechnic University),
Ph. D. (Tech.) I.G. Shashkov
(Air Forces Military Educational and Scientific Center «Zhukovsky – Gagarin Air Force Academy»)
Contact information: soni.81@mail.ru - Abstract: The article concerns the strengthening of loose crushed aggregate layers with the use of polyurethane binder at bridge abutments, road slopes, culvert heads, shoulders and other transport structures subjected to mechanical and temperature impact. The requirements for strengthening construction with polyurethane are determined with the use of the developed software program on the basis of the method of redundant triangles.
- Keywords: roads, bridge abutments, slopes, polyurethane composites, aggregates, protective surface layers, strengthening, repair, innovation, variation coefficient, falling slope angle, redundant figures method, calculation.
- UDC: 51-7:625.856
- File: Download
USING FORMYLIC ACID TO IMPROVE PROPERTIES OF DEICING AGENTS BASED ON CHLORIDES
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Engineer S.Yu. Rozov,
Ph. D. (Tech.) I.A. Patkina,
Engineer Yu.N. Rozov
(FAI «ROSDORNII»),
Engineer A.Yu. Shestachenko
(NPO Road Winter Maintenance Association)
Contact information: rozov@rosdornii.ru;
lbkm@rosdornii.ru - Abstract: The article concerns the results of the researches on decreasing impact of deicing agents (chloride group) on metal, concrete and environment when controlling winter slipperiness on roads. The study on the impact of modifier (formiates – sodium formiate) of deicing agents based on sodium chloride on metal corrosion, as well as corrosive power of cement concrete is reported. The ecological advantages of deicing agents modified with sodium formiate in comparison with sodium chloride are considered.
- Keywords: roads, deicing agents, metal corrosion, cement concrete, sodium formiate, environment, sodium chloride.
- UDC: 625.768.6
- File: Download
JUSTIFICATION OF REQUIREMENTS FOR ROAD PAVEMENT EVENNESS DURING OPERATION
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Doctor of Engineering O.A. Krasikov
(FAI «ROSDORNII»)
Contact information: krasikov@rosdornii.ru - Abstract: Based on existing methodical regulations improving a new economic and mathematical decision model of justification of requirements of road pavements evenness with regard to minimizing of functional representing cumulative discounted costs expressed by pavement condition function in ac-cordance with international roughness index (IRI) is proposed. New mathematical models for predicting IRI changes over time are used in the optimization model. The realization of the developed economic and mathematical model has been allowed justifying required IRI values of road pavements during their operation, and this has been carried out for the first time for Russian Federation road sector. In contrast to earlier performed optimization calculations, when justifying the requirements for road pavement evenness, quasioptimal corridors are used, analyzing which it is possible to substantiate the most rational values for evenness allowance. The usage of obtained results enables to enhance objectivity of road pavement evenness evaluation and confirm the necessity of performing preventive repairs.
- Keywords: road pavements evenness, international roughness index (IRI), economic and mathematical model, total discounted costs, quasioptimal corridors of evenness allowance, requirements for evenness during operation.
- UDC: 625.7.032.32:625.76
- File: Download
EVALUATION OF SOILS CONDITION USING GEORADAR METHODS
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Doctor of Engineering, Professor A.M. Kuliznikov
(FAI «ROSDORNII»)
Contact information: kulihzn@mail.ru - Abstract: The article deals with theoretical justification and case studies of evaluation of soils condition (humidity, density, homogeneity, pollution, salinization, temperature) using georadar methods. All examples are given based on the results of the experimental studies of different soils types on road sections.
- Keywords: georadar methods, soils, humidity, density, homogeneity, pollution, salinization, signal, amplitude, frequency, reflectivity.
- UDC: 625.7:624.131.3:550.837.3
- File: Download
ABOUT DYNAMIC IMPACT FACTOR EVALUATION
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Ph. D. (Tech.) N.A. Lushnikov,
Ph. D. (Tech.) P.A. Lushnikov,
Engineer A.B. Volkov
(FAI «ROSDORNII»),
Engineer A.O. Abulaksimov,
Engineer D.I. Kondrashin
(Moscow State University of
Railway Engineering (MIIT))
Contact information: p.lushnikov@rosdornii.ru;
lab@rosdornii.ru - Abstract: The article deals with the results of dynamic impact factor calculating obtained with the usage of dual-mass mechanical vehicle model. Dependences of dynamic impact factor on traffic volume and vehicle speed on a given road section are considered.
- Keywords: dynamic impact factor, mechanical vehicle model, dual-mass model, motion model equations.
- UDC: 625.7.03:531.1
- File: Download
SIMULATION OF STRESSES AND STRAINS OF ROADS PAVEMENTS
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Doctor of Physical and Mathematical Sciences,
Professor O.V. Matvienko,
Ph. D. (Physical and Mathematical Sciences) V.P. Bazuev,
Postgraduate student V.S. Churilin
(Tomsk State University of Architecture and Building)
Contact information: matvolegv@mail.ru;
slab@mail.tomsknet.ru;
lex-16-2008@mail.ru - Abstract: The article concerns a mathematical model describing stresses and strains of asphalt package when road pavement surface is being unevenly raised up. The main purpose of the represented research is to ensure the design quality of frost resistant flexible road pavements. With a view to achieving this objective the strains in the pavement when subgrade soils nonuniform heaving are studied. The scheme of a road pavement section deformation due to subgrade soils nonuniform heaving is developed. The elaborated model allows determining admissible values of road pavement surface raising, taking into account various factors, which are necessary for more qualitative design of frost resistant flexible road pavements.
- Keywords: mathematical model, road pavement, stress, strain, displacement field.
- UDC: 625.85:539.319+539.37:519.8
- File: Download
STUDY OF MATERIAL PROPERTIES FOR FIXING IN-ROAD PAVEMENT SENSORS FOR WEIGH-IN-MOTION
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Ph. D. (Tech) F.K. Gorbunov
(Institute of Solid State Chemistry and Mehanochemistry SB BAS),
Engineer Yu.N. Shevtsov
(LLC Scientific-Practical Entreprise «Novasib»)
Contact information: f1123723@yandex.ru;
shewtsow@yandex.ru - Abstract: The article considers the possibility of import substitution of the material for fixing the Kistler weigh-in-motion (WIM) sensors on the composite material on the basis of raw materials of Russian production. The influence of vibration effect on filling stage of samples till their curing on the material properties for fixation of WIM sensors is examined.
- Keywords: road, weigh-in-motion (WIM) sensor, road pavement, import substitution, composite material.
- UDC: 625.746:625.89
- File: Download
PECULIARITIES OF ORGANIZATIONAL DESIGN OF MAINTENANCE WORKS OF OUTDOOR LIGHTING ON FEDERAL ROADS
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Ph.D. (Tech.) N.B. Sakuta
(FAI «ROSDORNII»),
Engineer K.V. Kashtanov
(JSC «OrgSintezResurs»)
Contact information: sakuta@rosdornii.ru - Abstract: The task of outdoor lighting maintenance on federal roads has become significant and essential due to considerable growth of electric lighting lines. There is no detailed nomenclature and frequency of work execution of outdoor lighting elements maintenance in relevant normative and technical documentation. For solving this problem the classification of outdoor lightning elements based on structural chart is proposed. The system of structured elements is made determining the level of detailing and generalization taking into account the specific characteristics, which ascertain differences in labor input and work costs.
- Keywords: outdoor lighting, electric lighting elements, organizational design of maintenance works, nomenclature and frequency of work execution, classification, structural chart.
- UDC: 625.745.8:628.9
- File: Download
ABOUT THE PREDICTION OF RUTTING CAUSED BY ACCUMULATION OF STRAINS IN ASPHALT CONCRETE PAVEMENT (BASED ON THE USA NEW PAVEMENT DESIGN METHOD)
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Ph. D. (Tech.) A.E. Merzlikin
(FAI «ROSDORNII»)
Contact information: merzlikin07@gmail.com - Abstract: The rutting prediction according to the USA new pavement design method is based upon forecasting pavement maximum day temperature, daily traffic volume and soils moisture for the whole pavement design period. The structural strain is estimated by means of elasticity theory. The plastic strain is found from the structural strain by empiric formula.
- Keywords: road pavement, asphalt concrete pavement, prediction, rut, temperature, daily traffic volume, soil moisture, structural strain, plastic strain, elasticity theory.
- UDC: 625.85:539.37
- File: Download
CONDITION ASSESSMENT OF PRESTRESSING STEEL OF REINFORCED CONCRETE STRUCTURES DURING OPERATION
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Ph. D. (Tech.) M.I. Sheinzvit,
Engineer B.F. Yanovskiy
(FAI «ROSDORNII»)
Contact information: mostovik@rosdornii.ru - Abstract: The article deals with two methods for stresses calculation in concrete of reinforced concrete bridge structures by appreciable strains: stipulated by regulatory document the method for total unloading of concrete «fragment» detached from the structure, as well as the reported method of incomplete unloading by concrete cutting for partial unstressing with additional loading and its unloading. For the method of incomplete unloading the procedure of stresses calculation instead of that one, reported earlier, which has no physical meaning and brings incorrect results, is proposed.
- Keywords: reinforced concrete beam, stresses, strains, unloading, gauges, concrete «fragment».
- UDC: 624.21.012.46:624.012.36
- File: Download
ABOUT THE METHODOLOGY OF PROVIDING ROAD TRAFFIC SAFETY IN THE RUSSIAN FEDERATION
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Doctor of Engineering, Professor V.D. Kondratiev
(Moscow Automobile and Road Construction State Technical University (MADI)),
Doctor of Engineering, Professor A.V. Schepkin
(V.A. Trapeznikov Instituteof Control Sciencesof Russian Academy of Sciences)
Contact information: alexander-555@mail.ru - Abstract: The article deals with the models for providing road traffic safety in the country. A new methodological approach to road safety management system creation on short- and medium-term planning horizon is offered.
- Keywords: road traffic, road traffic safety, traffic accident, road traffic injuries, systemic approach, federal target program, matrix, feedback, management, program-targeted planning, structural and functional model.
- UDC: 625.7/.8:656.13
- File: Download
SIMULATION OF «COHERENT» AND «INCOHERENT» ACCIDENT-PRONE ROAD SECTIONS
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Ph. D. (Tech.) A.L. Rybin
(FAI «ROSDORNII»)
Contact information: Rybin@rosdornii.ru - Abstract: The paper discusses the models of «coherent» and «incoherent» accident concentration sections depending on road traffic congestion.
- Keywords: accident concentration sections, topographic accident analysis, road traffic congestion.
- UDC: 656.13.08
- File: Download
ABOUT THE QUESTION OF ROAD BINDER MATERIALS STRUCTURE FORMATION
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Ph. D. (Chemistry) V.I. Polyakova
Contact information: poliakovas@yandex.ru - Abstract: The article concerns the analysis of basic theoretical concepts in the field of road binders structure formation, bitumen disperse structures models building and other concepts (from the point of view of fundamental chemistry justification), proposed by such scientists and researchers as D.A. Rozental, I.A. Posadov, A.S. Kolbanovskaya, Z.I. Synyaev, A.I. Bodan, A.S. Sergeenko, F.G. Unger. The article contains a high volume of theoretical comparative data and includes the explanation of such processes as polymer-bitumen binders segregation at high temperatures, binder materials ageing, as well as causes of formation, existence and destruction of disperse systems and etc.
- Keywords: bitumens, petroleum disperse systems, structure formation, oils – resins – asphaltenes, new structure formation theory, disperse particles volume, penetration, polymer-bitumen binders (PBB), industrial oil, segregation.
- UDC: 625.85:691.16
- File: Download
RESEARCH RESULTS OF INFLUENCE OF MIXTURE COMPOSITION ON TECHNICAL PERFORMANCES OF CEMENTITIOUS BINDER USING FLY ASH
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Engineer I.M. Karamyshev,
Ph. D. (Tech.) E.A. Golubeva
(Siberian State Automobile and Highway Academy)
Contact information: +7(904)589-10-35;
elena.golybeva@inbox.ru - Abstract: A range of directions of fly ash materials usage in different sectors of national economy has been developed at present time. One of the main directions in construction sector concerns the usage of fly ash as additive to concrete, additive to mortar instead of fine aggregates and a part of cement, additive to concrete instead of aggregate, as well as utilization in road sector. In some cases such technologies provide presence of fly ash in vitreous state that causes significant improvement of products quality in comparison with nature materials. The article deals with the issue of fly ash wastes usage as binder material when concretes and mortars producing.
- Keywords: flue ash, activity, strength, binder, cement, concrete.
- UDC: 625.074:691.5
- File: Download
DEVELOPMENT OF METHODS FOR EVALUATIING ASPHALT CONCRETE ENDURANCE
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Ph. D. (Tech.) G.S. Bakhrakh
(FAI «ROSDORNII»)
Contact information: bakhrakh35@mail.ru - Abstract: Different methods of asphalt concrete fatigue testing applied in USA are reviewed. It is noted that such testing is not available in Russian reference documents. Recently the researches have been focused on refinement of the criteria for forecasting of service life of monolithic asphalt concrete layers package. It seems to be possible to change cycle testing for monotonic testing to determine asphalt concrete fatigue sensitivity index.
- Keywords: asphalt concrete fatigue testing, creep compliance, dynamic modulus of elasticity, endurance, semi-circular bend.
- UDC: 625.855.3
- File: Download