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Документ Determination of the laws of thermal resistance of wood in application of fire-retardant fabric coatings(2020) Tsapko, Yu.; Tsapko, A.; Bondarenko, O.Given that the main material for making structures is wood, which belongs to the group of medium flammability materials, there is a need for flameproofing with modern effective means. Its essence lies in providing wood with the ability to resist flame and flame propagation on the surface. preventing free access of oxygen, which accelerates the combustion process, can eliminate the risk of fireДокумент Research of Mechanism of Fire Protection With Wood Lacquer(2020) Tsapko, Yuriy; Lomaha, Vasyl; Bondarenko, Olga; Sukhanevych, MarynaThe effect of the composition on the weight loss of wood protected by a coating based on inorganic and organic substances in the process of thermal exposure, which is a feature of the study of the flame retardant effectiveness of the composition, is investigated. The solution of this problem is carried out by specially developed methods. The influence of fire protection under the influence of high-temperature heat flux on the change in the process of loss of mass of fire-protected wood is determined and the mechanism of kinetics of action of the composition is characterized, which is characterized by a decrease in the speed of flame propagation and mass loss. The results of thermogravimetric studies determined the weight loss of the coatings as a function of temperature, the results of which investigated the activation energy at the temperature decomposition of the coatings and found that for wood it was 36.56 kJ / mol, and in the case of fire protection it increased 2.3 times. which makes it possible to conclude that it is advisable to use lacquer varnish to improve the fire retardant efficiency of wood. Thus, for the specimen of fire-retardant lacquer wood, there is a gradual decrease in temperature, ie, the work of the coating is fixed, and, accordingly, the activation energy is increased during the decomposition of the wood. In order to establish the flame retardant efficiency in the application of high-temperature blowing lacquer, studies were conducted to determine the combustibility index of wood by mass loss, flame spread and temperature increase of flue gases and found that when processing wood goes to the group of combustible materials with a burning index.Документ Modeling of thermal conductivity of reed products(2020) Tsapko, Yu.; Tsapko, A.; Bondarenkо, O.The present work researches processes of heat transfer by samples of mats manufactured from reed. Due to the unique properties of the reed, such as medium density, low thermal conductivity, relatively high weather resistance, high chemical resistance, possibility to produce parts on-site, cost-effectiveness and others, reed products are widely used in building construction despite the high rate of development of new technologies. The mechanisms of heat insulation in the result of energy transfer through the material are established, which makes it possible to influence this process. It is proven, that the mechanisms are conditioned upon the increased porosity of the material. Thus, decreasing volume weight results in decreasing thermal conductivity, and vice versa. The simulation of the heat transfer process with the flameproof coating is carried out, the dependencies of the thermophysical coefficients on the temperature are determined. Based on the obtained dependencies, the coefficient of thermal conductivity for the products made of dry pine wood is calculated and makes 0.056 W / (m · K). Features of slowing down the process of heat transfer to material made of wood wool and glue binding agent with the formation of pores were studied. This is explained by the fact that there is no movement of air in large pores, accompanied by heat transfer. Thus, there are grounds to argue for the possibility of directed regulation of the processes of the formation of thermal insulation products using the reeds characterized by voids in the stems.Документ Modeling the process of moisture diffusion by a flameretardant coating for wood(Eastern-European Journal of Enterprise Technologies, 2020) Tsapko, Yu.; Tsapko, A.; Bondarenko, O.At present, among the most common building materials is wood, which, in terms of its flammability group, belongs to the group of combustible materials of medium flammability. To reduce these deficiencies, fire-retardant treatment provides wood with the capability to withstand the effects of flame and its propagation. One of the ways to protect wood from fire is to apply a fireproof coating on its surface, which for some time prevents heat from accessing the wood.Документ Optimization of the composition of hydrophobized cellular concrete according to its moisture-transporting and water-holding characteristics(IOP Publishing, 2020) Лаповська, С. Д.; Клапченко, В. І.; Краснянський, Г. Ю.; Гасан, Ю. Г.; Кузнецова, Ірина ОлександрівнаThe article is devoted to the study of the possibility of obtaining information about frost resistance and strength of concrete based on the analysis of its moisture-transporting and equilibrium water-holding properties. The dependences of the moisture diffusion coefficient, equilibrium moisture content at various values of relative humidity and porosity of autoclaved cellular concrete specimens on the concentration of water-repellent additive were studied. A comparison of the results of these measurements with the data on frost resistance, got by the direct method according to the current standards, have been made. It is shown, that moisturetransporting and water-holding characteristics can be used to assign concrete compositions optimal in frost resistance and strength. The mechanisms of the influence of water repellent on the frost resistance at its various concentrations are considered. It has been established that the composition of cellular concrete containing 2% water-repellent additive is optimal.Документ Radiation protective properties of fine-grained concretes and their radiation resistance(IOP Science, 2020-09-10) Anopko, Dmytro; Honchar, Olga; Kochevykh, Maryna; Kushnierova, LiliyStudies have shown that the thickness of the half layer of the gamma radiation flux attenuation with E = 662 keV is 3,5-5,2 cm (depending on the concrete density average) and for a neutron flux with E = 2,5 MeV is 5-6 cm. The radiation resistance of concrete under the influence of gamma radiation large doses, their activity and radionuclide composition after irradiation with neutrons was investigated. To study the behaviour of concrete under the influence of gamma radiation, two series of samples were made. One series was the control, and the second was exposed to gamma radiation. Its value corresponds to the dose that concrete can receive when it comes into contact with highly radioactive wastes from the “Shelter” facility for 300 years.Документ Модифікований ресурсоекономний штучний камінь для виробництва архітектурного декору і стінових виробів на основі гіпсової в'яжучої речовини(2020) Тарасевич, Віталій; Гасан, Юрій; Дроздова, ОльгаВ статті наведено результати досліджень модифікування штучного гіпсового каменю розробленим гідрофобізуючим хімічним розчином на основі полісульфіду кальцію та діоксиду титану. Наведено порівняльні показники водопоглинання вихідних і просочених розчином зразків. Досліджені характеристики вихідних матеріалів. Показано, що гідрофобізація розробленим хімічним розчином, залежно від кількості нанесених шарів чи часу просочення, має високі показники коефіцієнту розм’якшення виробів, який знаходиться в межах 0,6…0,82. The article presents the results of studies of modification of artificial gypsum stone developed by a hydrophobic chemical solution based on calcium polysulfide and titanium dioxide. The comparative indices of water absorption of the initial and impregnated samples are given. The characteristics of the starting materials are given. It is shown that the hydrophobization of the developed chemical solution, depending on the number of applied layers or the time of impregnation, has a high coefficient of softening of the products, which is in the range of 0.6...0.82. The dependence of the change in the weight of the samples and the depth of penetration of the solution in the structure of gypsum stone on the number of layers of the coating is shown. The depth of impregnation was determined by splitting the specimens. It is shown that the aggregate increases strength, and the aggregate is selected according to the purpose of the products: wall and architectural decoration elements.Документ Особливості технології отримання швидкотверднучих композиційних в'яжучих речовин(ЧНТУ, 2020-04) Гончар, Ольга Андріївна; Анопко, Дмитро ВіталійовичВибрана модифікуюча добавка дозволяє значно зменшити ефект спаду міцності в процесі твердіння і отримати штучний камінь, який характеризується стабільним зростанням міцності в часі. Розроблені в'яжучі композиції можуть бути застосовані для виробництва високоефективних швидкотвердіючих розчинів і бетонів, що відкриває перспективи інтенсифікації будівельних, ремонтних та реставраційних робіт, а також для виробництва сухих будівельних сумішей для влаштування підлогДокумент Radiation protective properties of fine-grained concretes and their radiation resistance(Харків: ХНУБА, 2020-05) Anopko, Dmitro; Honchar, Olha; Kochevykh, Maryna; Kushnierova, LiliaMany years of world experience in the selection of materials for radiation protection shows that concrete is the main material. It can combine heavy components to protect against gamma radiation and light components to absorb neutron fluxes. This fact, as well as manufacturability, low price and the possibility of using local materials, have determined the widespread use of concrete for protection against radioactive radiation.Документ Improving the energy efficiency of translucent structures with using of special purpose glasses(Харків: ХНУБА, 2020-05) Pushkarova, Katerina; Kochevykh, Maryna; Honchar, OlhaEnsuring the energy efficiency of translucent glass structures, including windows, balcony doors, storefronts used in buildings and structures, provides for minimal total energy costs not only for heating, but also for the conditioning and lighting of the premises. Modern translucent structures are represented mainly by doubleglazed windows, in the application of which heat losses are reduced due to the improvement of the window design and the use of new materials. Double-glazed windows should allow the maximum amount of light to be transmitted and at the same time minimally affect energy consumption for heating or cooling the room. The use of special-purpose glass allows to obtain a modern double-glazed window with different functional characteristics.