Будівництво та цивільна інженерія
Постійний URI для цього зібранняhttps://repositary.knuba.edu.ua/handle/987654321/1219
Переглянути
4 результатів
Результати пошуку
Документ The role of the crystallo-chemical factor in the evaluation and improvement of the nanomodification efficiency of mortar and concrete(IOP Conference Series: Materials Science and Engineering, 2019-12) Pushkarova, Katerina; Gonchar, Olga; Kaverin, KonstantinThe article presents a new approach to the control of the processes of structure formation of binder systems, taking into account the achievements of nanotechnologies. The possibilities of managing the structure of the material at the nanoscale and the micro-level by introducing primary nanoscale additives or forming nanoscale objects in the bulk of the material are considered. The peculiarities of contact zone formation and microstructure of artificial stone based on nanomodified Portland cement and alkaline binder systems are investigated. The role of the crystallo-chemical factor and its influence on the strength formation of all levels of concrete structure are shown. It is proved that when using micro silica modifying additives, their efficiency at the micro level is higher than at the meso- and macrolevels. At the same time, the modification of the binding systems by artificial zeolites provides a more pronounced effect in concrete at the macro-level – due to the crystallo-chemical similarity of additives, products of hydration and minerals of the aggregate. Taking into account the crystal-chemical similarity of the new formation opens new possibilities for the choice of nano additives, considering not only the principle and nature of their action at the level of nanoscale and microstructure, but also the influence on the peculiarities of the formation of the contact zone at the meso- and macro-levels, which will have a decisive influence not only on the strength, but also on the special properties of concrete.Документ The role of the crystallo-chemical factor in the evaluation and improvement of the nanomodification efficiency of mortar and concrete(2019-12) Pushkarova, Katerina; Gonchar, Olga; Kaverin, KonstantinThe article presents a new approach to the control of the processes of structure formation of binder systems, taking into account the achievements of nanotechnologies. The possibilities of managing the structure of the material at the nanoscale and the micro-level by introducing primary nanoscale additives or forming nanoscale objects in the bulk of the material are considered. The peculiarities of contact zone formation and microstructure of artificial stone based on nanomodified Portland cement and alkaline binder systems are investigated. The role of the crystallo-chemical factor and its influence on the strength formation of all levels of concrete structure are shown. It is proved that when using micro silica modifying additives, their efficiency at the micro level is higher than at the meso- and macrolevels. At the same time, the modification of the binding systems by artificial zeolites provides a more pronounced effect in concrete at the macro-level – due to the crystallo-chemical similarity of additives, products of hydration and minerals of the aggregate. Taking into account the crystal-chemical similarity of the new formation opens new possibilities for the choice of nano additives, considering not only the principle and nature of their action at the level of nanoscale and microstructure, but also the influence on the peculiarities of the formation of the contact zone at the meso- and macro-levels, which will have a decisive influence not only on the strength, but also on the special properties of concrete.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.