Будівництво та цивільна інженерія
Постійний URI для цього зібранняhttps://repositary.knuba.edu.ua/handle/987654321/1219
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6 результатів
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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 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 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.Документ Innovative building materials in creation an architectural environment(ХНУБА, 2020-05) Abyzov, Vadim; Pushkarova, Katerina; Kochevykh, Maryna; Honchar, Olha; Bazeliuk, NataliaProgressive building materials and technologies can ensure not only the durability of buildings and structures that are operated in difficult conditions and the consumption of a minimum amount of energy with little impact on the environment, but also will contribute to the creation of an effective and harmonious architectural environment in accordance with the requirements of sustainable development. An important role in solving these problems is assigned to recycled (reusable materials); traditional natural and local building materials that due to technical progress have gained new prospects for use in modern environmental and energy-efficient structures and buildings (“old-new” natural materials); nanomaterials and nanotechnologies, the use of which will not only improve the quality and properties of materials, and, accordingly, the environment, but also create completely new materials and architectural solutions with a set of properties. The purpose of this study is generalization, systematization and examination of these innovative materials and products.Документ Особливості технології отримання швидкотверднучих композиційних в‘яжучих речовин(ЧНТУ, 2020-04) Гончар, Ольга; Анопко, ДмитроРозроблені в'яжучі композиції на основі глиноземистого цементу та портландцементу, модифіковані спеціальними добавками, 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 підлог.