The authors consider the classification of methods for the formation of spatial core coatings based on the proposed kinematic systems. The possibility of using kinematic transformable systems in pre-fabricated seasonal coverings of a small span for the construction of greenhouses, warehouses, tents,...

This work describes results of the development of a testing method for stone-like siliceous and clay raw materials used for producing ceramic building materials. The relevance of the use of high-strength products in industrial and residential buildings is emphasized. The analysis of the raw materials...

The results of theoretical and experimental studies of the destruction of gypsum boards containing a circular hole and exposed to an unevenly distributed compressive load are presented. The samples made of high-strength gypsum brand GVVS-16 and construction gypsum brand G-5 were tested. The samples of...

The dependence of the wetting angle of pure Zn (99.9%) and Zn-Mo-Al-Mg (Serbian bronze) of compressed Co-W powder on the temperature in an atmosphere of pure He (grade A) was studied using the large "lying" drop. Wetting angle was measured in the CorelDraw x12 software environment. Found: 1) With an...

The paper presents a comparative assessment of the contribution of forest tree vegetation of the natural sanctuary Serebryany Bor and the Natural-Historical Park Bitsevsky Forest to carbon dioxide absorption. It is found that the amount of carbon dioxide absorption depends on both the composition of...

Using waste of different genesis as sorption materials allows solving several problems at once such as decontamination of waste and reduction of production costs. The physicochemical properties of the products of thermal modification of A?sculus hippocastanum L. leaves, which are promising raw materials...

The results of the study of physical and mechanical and tribological properties of PTFE-based composites with addition of serpentine and kaolin are described. Magnesium spinel was used as a functional additive. Improvement of the characteristics of the material due to mechanical activation of the fillers...

The paper discusses the issues associated with the development of multi-component binders and high-quality concrete on their basis. The basis for the preparation of such binders is the use of finely divided mineral additives of natural and man-made origin. Particular attention is paid to the aggregate,...

A preparation for field tribological tests of lubricants and additives in a real diesel engine was carried out. A diesel generator based on a TMZ-450D single-cylinder air-cooled engine and its are described. In this connection, a specific task of the work is the study of the wear of parts in the cylinder-piston...

Pure samples of solid solutions of (Na1-xLix)NbO3 system with high mechanical Q-factor, Qm, > 700, piezoelectric sensitivity, g33, ~ 40 mV·m/N, anisotropy of piezoelectric coefficients, d33/|d31|, > 5, low electrical conductivity, high piezoelectric activity, Kp, ~ 0.2, and a wide range of temperature...

The paper presents the features of production of acoustic porous fiberglass composites: developed temperature-time modes for foam-forming mixtures, compositions of complex foaming agents for soundproof material technology, technological methods to control the porous structure of fiberglass composites...

An effect of cold climates and hydrocarbon environment on the performance of elastomers based on nitrile-butadiene, epichlorohydrin, propylene oxide, F-4 polytetrafluoroethylene and zeolite paste containing propylene oxide rubbers were studied during 1-2 year full-scale exposure to cold climates in the...

The present paper deals with the research of plant cover in the area of a diamond-mining company. Its main objects are the vegetation of a natural biotope, affected land areas and the vegetation of transformed affected territories in the area of Udachninskiy Mining and Processing Plant. The research...

The article presents the peculiarities of the mineral formation in the "lime - mineral modifier from amorphized raw material" system depending on the composition of an additive. It is shown that the chemical activity of modifying components in terms of CaO binding and the formation of crystalline neoplasms...

The increase in strength requirements for wall materials for stretching and bending while maintaining or reducing their average density scientifically justified. The research shows that the technology of autoclaved gas silicate currently does not allow achieving the required level of properties. Therefore,...

The article deals with the methods for producing silicon carbide (4H-SiC) mono-crystals and films using the Schottky barrier. A nonlinear model of the Schottky barrier height and a composite model for the CVC of the total emission current were developed. An induction heating method for producing SiC...

According to the data of differential thermal, X-ray phase analyzes, as well as measurements of conductivity and pycnometric density, phase equilibriums were studied and phasing diagrams of TlInS2 - CuInS2 and TlGaSe2 - CuGaSe2 systems were created in the entire concentration range. The studied systems...

Phase equilibrium was studied on the basis of the data of differential thermal, X-ray phase analyzes, as well as measurements of conductivity and density. Phasing diagrams of TlInSe2-CuInSe2 and TlInSe2-AgInSe2 systems were constructed over the entire concentration range. The studied systems were quasi-binary...

HCH-brand salts were used in the experiment to study the dependence of conductivity of melts on temperature. The melt temperature was measured via platinum rhodium thermocouple (10% rhodium) and maintained with the accuracy of ± 2K. To avoid the influence of a temperature gradient, the melt conductivity...

The methods of physical and chemical analysis was used to study the phase formation in oxide-salty systems and the following conclusions were made: - similarity of crystal structures and small distinction of cation sizes (K+, Rb+, Cs+) in binary systems KNO3 - CsNO3 and RbNO3 - CsNO3 of 2K//A type...

The article presents the method for assessing bending stiffness by dynamic testing using an example of the experienced metal frame. The source of forced oscillations during dynamic tests was a modal vibration exciter in the form of a mechanical oscillator with stepwise frequency control. The results...

The article presents the results of researches of electrometallic coatings made of flux-cored wires with modifying additives of complex concentrate of rare-earth elements, obtained by extraction and leaching from ores of Tomtorskiy rare-metal deposit of the Republic of Sakha (Yakutia). Metallographic...

The paper presents research findings on extraction and identification of bacterial and mycelial forms of microorganisms on polymer composite materials under the influence of extreme frigid climate for further study of the destruction of these materials. The study made it possible to take wipe samples...

This paper illustrates the application of the artificial neural network for adsorption of ammonium NH4+ and COD from fish farm by rice straw as low cost carbonaceous. The effects of input parameters (contact time, pH, initial concentration of NH4+ and COD, adsorbent dosages, and temperature) are studied...

Taking into account the relevance of obtaining environmentally friendly materials with desired properties and the need for ionic conductors, we present the results of the synthesis and studies of oxygen-conducting La2O3 o 2MoO3 ceramics. Ceramic samples were obtained by the solid-phase method from the...

Unsteady water flooding, which combines cyclical water injection with a change in seepage flows direction, helps to increase reservoir coverage by water flooding and oil displacement due to water penetration into low-permeable rocks. The application of the developed device stimulates continuous injection...

The bench was developed in the laboratory of hydraulic devices at the Department of Oil and Gas Machines and Equipment. It allows to create conditions that are close to the conditions of the downhole of any well. Laboratory and experimental studies conducted on the bench included two stages: a) research...

The method of pulsed non-stationary flooding is a continuous regulatory process. Its optimal variant is determined by the stage of development of reserves. It is selected after a thorough analysis of the development, when the current oil reserves are determined differentially by zones and sections...

The binary systems Eu(L)3(ClO4)3∙2H2O and ternary systems EuL3(CD)3∙2H2O were synthesized. The structural features of the systems were analyzed. The composition and structure of the synthesized complex compounds were studied by NMR spectroscopy, IR spectroscopy, X-ray phase analysis, thermal analysis,...

The paper studies the influence of preheating on thermomechanical properties of heat-resistant ceramsite concrete based on activated composite binding agent. The basic composition of heat-resistant ceramsite concrete was used in the study. This composition included a ceramsite gravel of the Kizilyurt...

The article deals with problems of using wastes in metallurgy. In particular, the use of slags formed after the extraction of nickel, copper, cobalt, gold and other metals will be described. The paper provides the results of a study, evaluating the viability of using slags of Yuzhuralnickel plant in...

The main idea of this work was to obtain and study polymer composites based on synthetic isoprene elastomer and low density polyethylene, which contain soot and aluminum nanoparticles in various quantities. The composites were saturated with nanosized particles of aluminum and DG-100 soot with specific...

The article presents the results of experimental studies on the identification of the optimal burning conditions for ceramic raw materials based on clay loam from the Buguruslanskii deposit. The most common causes of cracking during drying, as well as measures to improve the crack resistance of manufactured...

Two-chamber device refers to pulsed sheet punching methods. This device is intended for use in small-scale production. Due to its design and efficiency it can significantly reduce the cost of stamped products. The article describes the principle of operation of the device, defines the criteria for the...

The theoretical foundations of the process of electric transfer (ET) in melts growing during contact melting (CM) of binary systems are considered. It is shown when the modes of this process will be carried out - speed-up and speed-down. It has been established that electro transfer makes an additional...

Adsorption methods are among the most promising water treatment approaches of today. Application of clay materials as sorption agents for surface and waste water treatment are of particular interest. The object of current study is bentonite mainly containing montmorillonite. The micro- and meso-porosity...

Methodical approaches to construction of dust discharge profile of industrial enterprise are proposed. The discharge profile is considered to be a parameterized characteristic of the component structure of dust with the selection of specific (indicative) for the technological process elements. On the...

The article analyzes the scientific and practical prerequisites for the formation (design) of the geoecological framework of the territory, the specific terminology in this area in the works of domestic and foreign researchers. The article studies the dynamics of the development of the concept of ecological...

The recent studies demonstrate the activation of geodynamic processes characterized by intense movement of the earth crust, manifestation of newest magmatism and active development of glaciers. The studies of different authors note the migration of seismic phenomena from south to the territory of Caucasus...

One of the factors in the formation of the ecological state of a city is the planning scheme of development, reflecting the features of the functional division of city space. At the same time, ensuring environmentally safe urban space involves solving the engineering problem of layout adjusting (optimization,...

The paper presents calculation results of hydrochemical balance. There are developed and described methods to reduce the concentration of sulfates in reservoir-cooler - Lake Kenon CHPP-1 in Chita. The operation of a coal station and disposal of its waste without anti-filtration measures directly affect...

The paper presents the results of study of structural and magnetic properties of alloys of quasi-binary systems R(Fe1-xMx)2, where R is REE and M is 3d-metal. It is shown that synthesis under extreme conditions, i.e. high temperatures and high pressures makes it possible to obtain alloys with the Laves...

The paper analyzes polymer fibrous ion-exchange materials on the basis of polyacrylonitrile matrix released as KN-1 cation exchanger and AS-1 and AN-1 anion exchangers. The purpose is to study the sorption properties of the specified materials in relation to multicomponent salt solutions of heavy metals....

Seasonal, annual trends of average, minimum and maximum temperatures, total precipitation and maximum daily precipitation from 1961 to 2017 in various climatic zones of the region have been studied in the paper. The study period was divided into two intervals from 1961 to 1975 and from 1976 to 2017....

Geoecological zoning of the eastern part of Nurinsky district of Karaganda region was performed for the first time to assess the conditions for construction of the motorway section within the framework of the One Belt, One Road idea. The paper analyzes current approaches to geoecological zoning of territorries...

The paper presents the results of study of zircons of polymetamorphic and granitoid complexes of the Urals. The morphological features of the mineral characteristic of metamorphic and granitoid rocks are established. Morphotypes corresponding to the different physicochemical conditions of their formation...

Against the background of comparing the scope of anthropogenic impact on environmental with the scope of natural processes influencing it, it becomes obvious that humanity cannot continue to pollute the environment uncontrollably, however, it cannot stop or at least reduce the rate of economic activity....

The increasing content of heavy metals in the soil and atmospheric air can lead to serious consequences and even affect a person. The method of moss biomonitoring was used to define heavy metals in atmospheric depositions. In 2015, the scientists of the Joint Institute for Nuclear Research introduxed...

The paper presents the study on modeling of objects and processes to forecast environmental safety in industrially developed regions of Russia. It is shown that the sources of pollution of the regional environment form a complex technogenic system triggering the development of qualitatively new negative...

The paper describes the environmental problems arising during restoration works in construction. The paper concludes and proves that problem of dust pollution of the environment, as well as the effects of dust emissions on workers during restoration works related to dismantling of destroyed and damaged...

The study of soil samples and bottom sediments from the Arctic region of the Sakha Republic (Yakutia) in the coastal zone of the East Siberian Sea (Nizhnekolymsky region) was conducted. The yield of chloroform extracts and the nature of the IR spectra were used to evaluate the hydrocarbon composition...

The use of technology of permanent (reference) base stations in surveying and geodetic works is a general trend in the developed countries of the world. This technology allows you to perform measurements with high accuracy in various areas of production. At present, the use of satellite technology in...

Ski tourism began to develop rapidly in Russia in recent years. A variety of trails and recreational facilities provide an opportunity to have good rest both for professionals and beginners. Currently, the JSC Resorts of the North Caucasus is designing the objects of the north-oriented slope of the Veduchi...

The article analyzes the land fund dynamics of border areas of Russia and Mongolia. These territories are distinguished by a low and medium degree of economic development of agriculture, mining and residential environmental management, which carries the greatest risk of the emergence and strengthening...

The research presents the results of integrated studies focusing on accumulation and migration of Hg in soils and plants in the vicinity of former chlor-alkali product manufacturers in Irkutsk region. The fractioning showed the prevalence of Hg compounds with organic and mineral components in soils and...

The results of comparing the model fields of 137Cs concentration in the Black Sea and the data of observations after the Chernobyl accident are presented. Several radiological surveys were used, during which 137Cs concentrations in the upper sea layer were measured for a year after the accident. Simulation...

The article presents spectrophotometric study of the content of biogenic and abiogenic chemical elements in surface and underground natural waters of the South Ural and other regions. The concentrations of the most important biogenic and abiogenic elements in these waters were determined. The excess...

The article proposes a procedure for optimizing the system for the recycling of oily waste (OW) according to the environmental safety criterion based on the Data Envelopment Analysis (DEA) method. The waste disposal system includes the storage facilities of the OW, technological installations for their...

The solar wind has a strong influence primarily on the outer shells of the Earth (the magnetosphere and the ionosphere). As a result, it affects the potential difference between the ionosphere and the Earth's surface as well. The paper presents the results of the performed analysis of the relationships...

One of the main ways to increase the efficiency of traditional heat supply systems is the transition to alternative energy-saving technologies for the production of heat energy based on the use of unconventional and renewable energy sources and in particular wind energy. In this case, wind energy may...

There is a pressing need for high-quality water supply to the population of Grozny. This is due to a specific mixture of salts of heavy metals and lithium, and microbial contamination in the surface water reservoirs. To ensure effective purification of severely polluted surface water, it is necessary...

Tarasovskoe oil and gas condensate field is located in the Purovskii district of the Yamal-Nenets Autonomous District of the Tyumen Region, 55 km north of Tarko-Sale town and 45 km east of Gubkinskii town. One of the main drawbacks of the existing field development system is a large stock of non-operating...

For grouping objects of Western Siberia it is proposed to use the parameters characterizing the degree of influence on the displacement factor of radial microinhomogeneities and hydrofobisation of pore channels of the productive strata. These parameters are obtained from the analytical expression for...

The analysis is based on the use of the "Coscad 3D" software technology including methods of statistical and spectral analysis of geophysical information, automatic tracing of anomaly axes and decomposition of fields into local and regional components. Interpretation of initial geophysical data and analysis...

The influence of the type of constructive system of buildings, their number of floors, as well as the parameters of seismic impact on the residual deformations of seismic insulating rubber-metal supports with lead core installed at the level of the top of foundations is investigated. By constructive...