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STRUCTURAL AERATED CONCRETE OF NON-AUTOCLAVE HARDENING
FOR MONOLITHIC LOW-RISE CONSTRUCTION
Authors: V.V. Belov, K.A. Mikaelyan
Abstract: . The paper develops the technological basis for the production of structural aerated concrete of non-autoclave curing for monolithic low-rise construction with the use of polymer cement binder and glass microsphere production waste. It is noted that one of the key aspects of the study is the use of polymer additives that improve the physical and mechanical properties of the material and increase its durability, and glass microsphere production wastes, in turn, are an effective microfiller of aerated concrete, increasing its physical and mechanical properties. According to the results of the study, it is concluded that the developed non-autoclaved aerated concrete can be a competitive low-energy-intensive structural material for monolithic low-rise construction, combining also thermal insulation functions.
Keywords: structural aerated concrete, non-autoclave, polymer, polymer cement binder, strength, density, modification of aerated concrete, waste from the production of glass microspheres.
ASSESSMENT OF THE IMPACT OF THE RESTORED PART
OF THE ELIJAH CHURCH ON EXISTING STRUCTURES
Authors: T.M. Gurevich, E.I. Primakina
Abstract: This article presents the results of a study of the influence of the restored part of the religious building on existing structures.The results of calculations of several spatial models of the construction are presented. Conclusions were drawn on the feasibility of restoring the facility in accordance with the design solution.
Keywords: restoration, foundations, vaults, calculation models, settlements, stress.
HOMOGENIZATION OF DISPERSED MATERIALS
BY VIBRO-ACOUSTIC DISINTEGRATION
Authors: A.G. Mikhailov, I.I. Demchenko, O.S. Ignatova
Abstract: A complex vibration-acoustic method of homogenization of dispersed materials based on the disintegration process is proposed. Theoretical substantiation of disintegration by acoustic treatment is developed. Laboratory tests of dispersed clay material by the method of acoustic disintegration with determination of the main parameters have been carried out. It is noted that the method is based on the principle of processing of dispersed materials by vibration and acoustic vibrations. The achievement of complete homogeneity of fine dispersed clay material during the period of two-minute treatment was established. Achievement of at least 90% homogeneity of the mixture of different size classes (class of concrete) during the same two-minute period is fixed.
Keywords: disintegration, clay, laboratory installation, vibration, acoustic, oscillation.
POWER SAVING GRANULAR BULK FLOW CONTROL
Authors: A.A. Peshekhonov, I.V. Rudakova, A.V. Chernikova, S.N. Kuzmina
Abstract: Automatic systems with volumetric flow control of bulk materials are considered. For a certain area of particle size distribution and density, the advantage of pneumatic feeders over systems with mechanical action on bulk materials is shown.To minimize energy consumption, it is proposed to control the flow rate of loose material in the form of pulses with variable duty cycle, the amplitude of which ensures minimum specific energy consumption by air flow rate. Energy-efficient management of granular bulk solids is an important challenge in various industries such as agriculture, food processing, construction and others. Efficient management of the flow rate of such materials can significantly reduce the cost and environmental impact. The key aspects whose research can be useful in this area are such as: process optimization, data monitoring and analysis, energy efficient technologies, inventory management, personnel training, use of alternative energy sources, and waste reduction. These measures can help not only in reducing costs, but also in making the business more sustainable in the face of changing market and environmental requirements.
Keywords: granular bulk materials, volumetric flow control, pulse control, minimum power consumption.
INCREASE IN THE LIFE CHARACTERISTICS OF BATTERIES
BY USING THE CONTROLLED DESULPHATION METHOD
Authors: K.B. Korneev, M.B. Mankov
Abstract: The paper notes that modernization of electric grids and increase in the share of alternative sources of electric power lead to an increased need for chemical storage of electric energy. Along with lithium-ion batteries, lead batteries are used for such needs, which require special measures to increase their service life. This technical problem can be solved by using specialized charging devices for controlled desulfation of batteries. It is concluded that due to this it is possible to prolong the life of batteries, reduce the number of utilized batteries and increase the power protection of facilities using such batteries as a backup source.
Keywords: energy supply, battery, desulfation, reliability, backup, environmental protection, resource.
PECULIARITIES OF METROLOGICAL RELIABILITY
OF MICROPROCESSOR-BASED ELECTRICITY METERS
Authors: S.V. Marinova
Abstract: The article deals with the aspects of determination of the microprocessor electricity meters verification interval. Detailed description of the method which use of existing techniques with reliability indicators. The need for adjustment is shown microprocessor electricity meters verification interval correct.
Keywords: metrological reliability, verification interval, microprocessor electricity meters.
INTERPRETATION OF MAGNETIC FLUX QUANTUM MEASUREMENT RESULTS
Authors: V.D. Pavlov
Abstract: A quantum of kinetic momentum is attributed to a two-particle system of correlated electrons. As a result, the minimum possible magnetic flux (quantum) became smaller (twice) than the flux calculated for a single electron. There is an obvious contradiction, since magnetic flux is an additive quantity and therefore it would be more natural to expect its increase rather than decrease. The aim of the study is to resolve this contradiction. The possibility of creating a magnetic flux by a two-particle system of electrons and measuring it is not exclusive. Magnetic flux can be created by a single electron with the same success. Just as in the case of pair correlation the quantum of magnetic flux decreased twofold compared to F. London's quantum, in the case of n-fold correlation the quantum will decrease n times. There is no reasonable explanation for this. Ascribing a quantum of kinetic momentum to a Cooper pair is unacceptable. A quantum of kinetic momentum should be attributed to a single particle, and should not be attributed to a system of particles.
Keywords: quantum structure, correlated electrons, conductor, mean free path, kinetic moment, magnetic flux.
MAGNETIC CHARGE. AXIAL INTERACTION
OF CONDUCTORS WITH CURRENTS
Authors: I.P. Popov
Abstract: The article notes that the force of field interaction between two point non-vector objects (gravitational or electrostatic) depends on the magnitude of charges, which are understood as mass or electric charge. In this case, there are no problems with determining the field strength by dividing the force by the charge, since this operation does not affect vectors. It is shown that the situation is different with magnetic interaction. When trying to determine the strength by excluding the vector quantity from the formula for force, a problem arises with the remaining two vectors, which consists in the fact that they cannot interact with each other (form a vector or scalar product). It is noted that the classical scheme excludes any difficulties in determining magnetic charges and monopoles. It is established that in addition to the interaction between parallel conductors with currents there is an axial interaction.
Keywords: hidden and combined vectors, field, monopole, charge, force, tension.
THE THEOREM ON THE n-SYMMETRY LINES
OF A CONVEX FLAT PLATE
Authors: Al.A. Shum, A.M. Vetoshkin
Abstract: The concept of the moment of the n-th order of a flat plate relative to a given straight line is considered. A straight line is a line of n-symmetry if the moments of the n-th order of the two sub-plates into which the original plate is divided by this line are the same. It is established that the moment of the n-th order of the convex flat plate relative to a straight line L, drawn parallel to a given straight line, reaches the smallest value when the straight line L is a line of (n 1)-symmetry of this plate.
Keywords: moment of n-th order, line of n-symmetry, half-mass line, equilibrium line, convex flat plate, density function, mass, center of mass, electric machine.
RUTHENIUM-CONTAINING CATALYST FOR FRUCTOSE HYDROGENATION
Authors: M.Е. Grigoriev, К.Е. Solovyov
Abstract: The article presents data on the use of heterogeneous catalytic systems in the process of fructose hydrogenation to polyols – sorbitol and mannitol, which are of great industrial importance. The results of kinetic testing of a ruthenium-containing catalyst synthesized using hyper-crosslinked polystyrene grade MN100 are presented. It was found that it is characterized by high activity in fructose hydrogenation, capable of carrying out the hydrogenation process with almost 100 % substrate conversion. The hydrogenation products were only sorbitol and mannitol, the yield of mannitol was slightly lower than sorbitol and amounted to 47 %. A comparison of the 5% Ru/MN100 catalyst with the commercial 5 % Ru/C in terms of fructose conversion and mannitol yield was carried out. It is shown that the catalyst used in the article exceeds 5 % Ru/C not only in activity, but also in mannitol yield.
Keywords: hydrogenation, ruthenium, carrier, catalyst, fructose, sorbitol, mannitol.
OPTIMIZATION OF CONDITIONS FOR OBTAINING CALCIUM METHIONATE
Authors: A.I. Petrova, D.Yu. Tsvetkov, N.V. Lakina, V.Yu. Doluda, A.I. Sidorov
Abstract: Methionine is a part of proteins and peptides. The methionine-based feed additive is designed to improve the growth and productivity of cattle, including cows. Methionine salts have significant advantages over methionine itself, making them more attractive for a wide range of applications. At the moment, there is a general method for obtaining chelated methionine complexes. But each metal has its own characteristics, meaning different products of solubility. This work is devoted to optimizing the conditions for the synthesis of calcium methionate, a valuable feed ingredient and food additive. The process of obtaining calcium methionate, as a rule, involves the interaction of methionine with a calcium source in an alkaline medium, followed by the release of the target product by crystallization.
Keywords: methionine, calcium methionate, crystallization.
QUANTITATIVE DETERMINATION OF COPPER
IN A CHELATED COMPLEX WITH METHIONINE
BY X-RAY FLUORESCENCE ANALYSIS
Authors: D.Yu. Tsvetkov, A.I. Petrova, N.V. Lakina, V.Yu. Doluda, A.I. Sidorov
Abstract: The main advantage of copper methionate is its higher bioavailability compared to inorganic copper salts such as copper sulfate or copper oxide. This means that the body can absorb and use more copper from methionate, making it more effective. The chelated form protects copper from binding to absorption inhibitors in the intestine, providing better absorption. It is added to feed for various farm animals, including pigs, birds, cattle and even fish, to ensure an adequate supply of copper. Copper is important for a variety of physiological processes in animals. Chelation is the process of combining a trace element ion with an organic molecule (chelator), which protects it from destruction in the gastrointestinal tract and promotes its efficient transport through cell membranes. Due to this feature, chelated minerals are absorbed by the body much better, which allows you to achieve the desired effect when using smaller doses. Moreover, they interact better with other nutrients inside the cell, providing a synergistic effect and increasing the efficiency of the entire metabolic process. The analysis of copper methionate has a multifaceted significance in science and practice. It helps to understand the biological functions of copper, develop new treatment methods, and optimize agricultural practices. In this work, the copper methionate chelate complex was analyzed by X-ray fluorescence analysis and its effectiveness for metal analysis in the chelate complex was revealed.
Keywords: copper methionate, chelation, X-ray fluorescence analysis, chelate complex.