№ 1 on 2024:

TRACK STRUCTURE FOR HIGH SPEED TRAINS MOVEMENT

Novakovich V.I.

Abstract:
The article analyses the popular opinion about the necessary increased mass of elements of the track structure for railway track sections with high-speed traffic. Alternative solutions are suggested.

Keywords:
construction of track structure elements, fastenings, high-speed traffic, mass of track structure elements; methods of calculations of track structure elements; rails, reinforced concrete sleepers

ECOLOGICAL ASPECTS OF PRODUCTION OF CAST SULPHUR-ASPHALT MIXTURES

Zumbadze B.G., Men’kina U.O., Ermilova A.A., Vasiliev Yu.E., Silkin V.V.

Abstract:
It is indicated that the production of asphalt concrete mixtures is conditionally environmentally friendly, since at accepted process temperatures, the emission of hydrocarbon compounds characterized by carcinogenic, mutagenic and teratogenic effects is observed. It is pointed out the environmental advantages of warm asphalt concrete, as well as cast sulphur asphalt concrete mixtures, A comparative analysis of the negative environmental impact of the production of cast asphalt concrete mixtures and sulphur asphalt concrete mixtures is given. A comparative analysis of the negative environmental impact of the production of cast asphalt concrete mixtures and gray asphalt concrete mixtures is presented.

Keywords:
cast asphalt concrete, environmental safety, fuel consumption, mixture preparation temperature, modified sulphur, sulphur asphalt concrete mixtures

EXPERIMENTAL STUDIES ON SUBSTANTIATION OF APPLICATION OF SUPER STRONG FIBRE CONCRETE AS AN ADDED REINFORCEMENT LAYER IN BENDING REINFORCED CONCRETE ELEMENTS

Sapronov I.M., Ageev A.V., Zabrodin M.E., Balkazar Moser Brian

Abstract:
On the basis of bench tests of flexural reinforced concrete beam specimens with added reinforcement layer made of super strength fibre concrete and comparing them with the performance of unreinforced beams with rod reinforcement, the force performance patterns are studied and the possibility of significant increase in bearing capacity is confirmed.

Keywords:
added reinforcement layer, flexural beam specimens, reinforcement of reinforced concrete elements, super strength fibre concrete, testing of reinforced concrete beams

METHOD FOR DETERMINING RESIDUAL STRENGTH CLAY SOILS IN THE ZONE OF LANDSLIDE DEFORMATIONS

Emelyanov S.N., Fomin A.V.

Abstract:
Engineering-geological studies are considered to determine the sliding zone of landslides and their type. The application of the method of ‘reverse’ calculations to determine the strength of clay soils in the slip zone is given.

Keywords:
landslides, method of ‘inverse’ strength calculations in the displacement zone, slip zone structure, slope stability, slope stability restoration

JUSTIFICATION OF VALUES OF MODULI OF TOTAL DEFORMATION OF STABILIZED SOILS, TAKING INTO ACCOUNT THEIR CLASSIFICATION ACCORDING TO THE INDEX OF DIRECT BEARING CAPACITY

Goryachev M.G., Retunskiy A.A., Nabatchikov A.S.

Abstract:
The relationship between the index of direct bearing capacity of stabilized soils and their total deformation modulus has been proposed, which is necessary for determining the design moduli of elasticity used to calculate the strength of pavements.

Keywords:
modulus of total deformation, pavement design, stabilized soils

ALGORITHM OF BITUMEN-CONCRETE MIXES COMPOSITION DESIGN BY STRUCTURAL-MECHANICAL PROPERTIES

Brezhneva M.A., Vasiliev Yu.E.

Abstract:
It is shown that considering the structural and mechanical properties of materials leads to a reduction in time and an increase in the efficiency of the design process and, as a result, to an increase in the quality of the mixture in industrial production at enterprises of the road construction industry. It is concluded that when designing the composition of the bitumen-concrete mix, it is necessary to consider the weather and climatic conditions in the region where the highway is located, as well as information about the modes and intensities of road transport. An algorithm for designing the composition of bitumen-concrete mixes according to structural and mechanical properties is proposed, and a detailed description of its scheme with the calculation models used is given.

Keywords:
algorithm, bitumen-concrete mix, bitumen viscosity, grain composition, materials, production technology, road surface, tests

ASSESSMENT OF THE CONTRIBUTION OF THE ROAD TRANSPORT SYSTEM TO PARTICULATE MATTER POLLUTION OF THE SURROUNDING ATMOSPHERE (beginning)

Khaustov A.P., Redina M.M.

Abstract:
The paper presents approaches to assessing the contribution of the transport complex (cars and road surface) to atmospheric pollution by particulate matter on the example of the territory of the campus of the Peoples' Friendship University of Russia named after Patrice Lumumba and the adjacent South-West Forest Park of the capital. Current methodological documents (including the regulations on road construction) do not allow for an unambiguous quantitative assessment of pollution. The obtained calculated data were verified by the results of snow surveys. It has been established that at least 45 % of solid particles resulting from the wear of road surfaces, brake discs, tires and treads remain in the study area. The distribution pattern of particles of different diameters (PM2.5, PM10) is significantly different. The maximum contribution to pollution comes from road surface abrasion, which is confirmed by analysis of particulate matter from various sources. This makes it urgent to develop coatings using innovative materials and treat the road surface with special means to suppress dust formation.

Keywords:
asphalt concrete pavement, atmospheric deposition, polycyclic aromatic hydrocarbons, snow geochemical survey, solid particles, transport

TRANSPORT CONSTRUCTION AT THE XXVII WORLD ROAD CONGRESS

Kosmin V.V.

MONORAIL: YESTERDAY, TODAY, TOMORROW

Troitskaya N.A., Khokhlov A.A., Makurina V.M.

Abstract:
Current problems of improving population transport systems in large cities and megacities are considered. The problems are aggravated with the growth of territories and population. In this connection, new principles of solving the corresponding problems with the help of progressive high-speed transport means with minimum use of the urban territory are developed. The most promising in many cases are monorail mounted and suspended roads on supports, as well as their analogues. The growth of monorail systems in China and Japan has been noted. Attention is paid to the development of their analogue – the Unitsky E. (uST) system, recognized in 2017. The Ministry of Transport of the Russian Federation recognized in 2017 as innovative, implemented in Belarus and the UAE and planned for implementation in Moscow in the area of ‘Moscow City’, Dorogomilovsky tunnel, etc., as well as in the area of ‘Moscow City’. Another new analogue is the development of the system of the ‘Dahir Insaat’ firm, which can be promising in modern urban planning conditions.

Keywords:
alternative roads; big cities, megapolises, monorail roads

100 YEARS SINCE THE BIRTH OF PROFESSOR I.V. TURBIN