scholarly journals Optimal composition test of cement primers in pile foundation construction by boriing and mixing method

2021 ◽  
Vol 25 ◽  
pp. 106-110
Author(s):  
N.G. Seregin ◽  
◽  
V.I. Zaprudnov ◽  
Keyword(s):  
Russian Federation ◽  
Physical And Mechanical Properties ◽  
Pile Foundations ◽  
Physical Parameters ◽  
Optimal Composition ◽  
Soil Extraction ◽  
Main Indicator ◽  
Soil Structures ◽  
Mixing Method ◽  
The Russian Federation

The analysis of soil structures in the territory of Western Siberia of the Russian Federation is given. The conditions of soil extraction for the construction of foundations are considered. The expediency of using loess soils for the construction of pile foundations with the use of cement primers is justified. The purpose of the work is formulated. A method for evaluating the physical and mechanical properties of soils for the construction of pile foundations by drilling and mixing method is considered. The main indicator of the soil for achieving this goal, which is a measure of its fragility, is determined. The curve of the dependence of the stress in the soil material on the deformation is considered and analyzed. The physical parameters of loess-like soils of various territorial regions of the Russian Federation are studied. Recommendations for the formation of the optimal composition of the soil for strengthening it with cement in the construction of pile foundations by drilling and mixing method are given.

scholarly journals Research of properties of cement-soil piles of foundations of buildings and structures

2020 ◽  
Vol 24 (5) ◽  
pp. 104-108
Author(s):  
N.G. Seregin ◽  
◽  
V.I. Zaprudnov ◽  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Activation ◽  
Russian Federation ◽  
Western Siberia ◽  
Physical And Mechanical Properties ◽  
Soil Types ◽  
Ground Mixture ◽  
Mixing Method ◽  
The Russian Federation ◽  
Cement Soil

The review of soil types prevailing in Western Siberia of the Russian Federation is presented. The compositions and physical and mechanical properties of soils are analyzed. Special attention is paid to loess subsidence soils. The problem of obtaining a homogeneous cement-ground mixture is formulated and set. The technological scheme of production of cement-ground piles of foundations of buildings and structures by drilling-mixing method with mechanical activation is considered. Considers methods of strengthening the loess subsidence of soils. Methods for studying the properties of cement-based piles of foundations of buildings and structures are formulated. A multi-factor experiment was conducted to evaluate the parameters that affect the properties of cement-based piles. Based on the research results, conclusions and recommendations are formulated.

WASTE RECYCLING ENERGY AND NON-FERROUS METALS IN THE PRODUCTION OF CERAMIC BRICKS CONTRIBUTES TO THE ECOLOGICAL SAFETY OF THE BIOSPHERE

2019 ◽  
pp. 71-80
Author(s):  
Abdrakhimov
Keyword(s):  
Russian Federation ◽  
Building Materials ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Ceramic Materials ◽  
Waste Recycling ◽  
Mineral Wool ◽  
Raw Material ◽  
Material Base ◽  
The Russian Federation

Environmental security is currently one of the main components of the national security of the Russian Federation and includes not only control over the state of the environment, but also the implementation of measures to prevent the occurrence of environmental crises and disasters. The reduction of reserves of tradi-tional natural raw materials makes us look for new ways to replace it with different types of waste. The expe-rience of advanced foreign countries has shown the technical feasibility of this area and the use of more as a tool to protect the environment from pollution. However, almost all basic building materials can be made from waste or from waste in combination with natural raw materials. Due to the involvement of multi-tonnage waste in the production of ceramic materials of mass consumption, which include ceramic bricks, it is possi-ble to radically change the parameters of the raw material base of Russia, which also helps to reduce envi-ronmental tensions in the regions. Production of ceramic bricks  one of the most material-intensive sectors of the economy, so the rational use of fuel, raw materials and other material resources is a decisive factor in its successful development in the context of economic reform. In this regard, the use of waste in ceramic mate-rials is of particular relevance. On the basis of beidellite clay, waste: energy ─ ash and slag material and non-ferrous metallurgy ─ sludge Nickel-skeletal catalyst obtained ceramic brick with high physical and mechanical properties. Innova-tive proposals for the use of waste from the production of mineral wool in the production of wall materials – ceramic bricks based on fusible clay, the novelty of which is confirmed by a patent of the Russian Federation.

scholarly journals Trends and expediency of classifi cation of combine harvesters

2019 ◽  
Vol 49 (4) ◽  
pp. 76-85
Author(s):  
G. E. Chepurin
Keyword(s):  
Russian Federation ◽  
Physical And Mechanical Properties ◽  
Comparative Testing ◽  
Effi Ciency ◽  
The Usa ◽  
The Russian Federation ◽  
Cis Countries ◽  
Combine Harvesters ◽  
Grain Bulk ◽  
Former Ussr

The work presents the results of the analysis of combine harvesters’ classifi cation systems applied in the former USSR, the Russian Federation and the CIS countries, as well as in the USA and Argentina. The expediency of their application is shown depending on the purpose of combines, advertising, organizing their production and operation in various climatic and industrial conditions. Classifi cation by structural and energy parameters is necessary when developing new combines. However, it does not reveal the potential functionality of combines and the effi ciency of their work in specifi c zonal conditions with signifi cant fl uctuations in yield, moisture, straw content and other physical and mechanical properties of harvested crops. In Russia and the CIS countries, combine harvesters are classifi ed according to their nominal throughput specifi ed in the passport. It is characterized by the value of the actual supply of grain bulk in kilograms per second to the combine thresher with a grain loss of 1.5% whereby grain is threshed in the direct way with standard yield and specifi ed moisture and straw content. Previously, the standard in the USSR stipulated that testing should be carried out in areas with the yield of at least 4 t/ha. In some areas, due to a low grain yield, it was not possible to indicate the conditions of comparative tests. The standards of the Russian Federation provide for comparative testing of combines during grain threshing with a yield characteristic of the zone. This contradicts the principles of the identity of comparative test conditions. To solve this urgent scientifi c problem, it is necessary to develop alternative, less laborintensive methods for comparative testing of combines in determining their nominal throughput recommended by the Ministry of Agriculture of the Russian Federation. At the same time, it is necessary to allow underutilization of the nominal throughput of the harvester of no more than 10%. Overloading the thresher is not allowed, since it leads to signifi cant grain losses during threshing.

Analysis of modern official methodological approaches to assessing the effectiveness of state and municipal property management

2021 ◽  
pp. 83-91
Author(s):  
Svetlana Vyacheslavovna Kozlova
Keyword(s):  
Russian Federation ◽  
Legal Regulation ◽  
Property Management ◽  
Entire System ◽  
Optimal Composition ◽  
Federal Level ◽  
Mandatory Requirement ◽  
The Russian Federation ◽  
Methodological Approaches

The article presents the results of the analysis of the new efficiency methodology, which is the resulting document, which reflects the current official views on this issue. Until 2020, there were no criteria for determining the effectiveness established at the federal level by legal acts that could be taken as a basis for regions and municipalities. To eliminate gaps in the legal regulation in the field of state property management in October 2020 the methodology for determining the criteria for the optimal composition of state and municipal property and indicators of the effectiveness of management and disposal of it was approved. For federal authorities, the use of this methodology in the management and disposal of property is a mandatory requirement, and for the executive authorities of the subjects of the Russian Federation and local self — government bodies-a recommendation. The article considers in detail the changes in methodological approaches to assessing the effectiveness of state property management, which will contribute to the improvement of the entire system of state property management, and also notes the bottlenecks in the currently existing methodological approaches to assessing the effectiveness of state property management.

Prospects of development of the reference base of the Russian Federation in the field of length measurements

2020 ◽  
pp. 3-5
Author(s):  
Y. G. Zakharenko ◽  
N. A. Kononova ◽  
V. L. Fedorin ◽  
Z. V. Fomkina ◽  
K. V. Chekirda
Keyword(s):  
High Precision ◽  
Russian Federation ◽  
Reference Base ◽  
Length Measurements ◽  
Laser Sources ◽  
The Russian Federation ◽  
Unit Of Length ◽  
Further Development ◽  
532 Nm

The results of the work to create a complex of high-precision hardware for the unit of length reproduction and transferring carried out at “D. I. Mendeleyev Institute for Metrology (VNIIM)” are represented. This complex will serve as the basis for the further development of the reference base of the Russian Federation in the field of length measurements and will allow reproduction of the unit of length at two wavelengths of 633 nm and 532 nm, as well as measurements of the wavelength of laser sources in vacuum in the range from 500 to 1050 nm.

Assessment of the state and level of development of public-private partnership projects in the subjects of the Russian Federation

2018 ◽  
pp. 131-141 ◽  
Author(s):  
A. N. Savrukov ◽  
N. T. Savrukov ◽  
E. A. Kozlovskaya
Keyword(s):  
Detailed Analysis ◽  
Russian Federation ◽  
Significant Proportion ◽  
Transport Sector ◽  
Private Partnership ◽  
Current State ◽  
Central Regions ◽  
The Russian Federation ◽  
Project Data ◽  
Municipal Level

The article analyzes the current state and level of development of publicprivate partnership (PPP) projects in the subjects of the Russian Federation. The authors conclude that a significant proportion of projects is implemented on a concession basis at the municipal level in the communal sphere. A detailed analysis of the project data showed that the structure of the projects is deformed in favor of the central regions of the Russian Federation, and a significant share in the total amount of financing falls on the transport sector. At the stage of assessing the level of development by the subjects of the Russian Federation, criteria were proposed, and index and integral indicators were used, which ensured comparability of the estimates obtained. At the end of the analysis, the regions were ranked and clustered according to the level of PPP development, which allowed to reveal the number and structure of leaders and outsiders.

Assessing the size of agricultural holdings

2020 ◽  
pp. 105-116
Author(s):  
N. I. Shagaida
Keyword(s):  
Russian Federation ◽  
Vertical Integration ◽  
Total Revenue ◽  
Large Share ◽  
State Support ◽  
The Russian Federation ◽  
Agricultural Organizations ◽  
Business Entities ◽  
To Receive

The article clarifies the concept of “agricultural holding”, using an approach to assessing the size on the basis of the total revenue of all agricultural organizations within the agricultural holding. It has been revealed that only 100 of the total number of agricultural holdings that were identified can be attributed to large business entities. They comprise about 3% of agricultural organizations in the country, while their share in the proceeds is about 37%. A large share of agricultural holdings — large business subjects under the control of Russian entities operate in one, and under the control of foreign legal entities — in three or more regions of the Russian Federation. Vertical integration within the framework of large agricultural holdings with different schemes for including the stages of processing and sale of products produced in their agricultural organizations allows them to receive advantages. Strengthening the role of large business entities in agriculture puts on the agenda the issue of differentiating approaches to taxation and state support in agriculture, depending on the size of the companies’ agricultural businesses.

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