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https://repository.sspu.edu.ua/handle/123456789/324

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Перегляд Статті за Ключові слова "corrosion of concrete"

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  • Документ
    Determining the Characteristics of Concrete in a Historical Building Under the Influence of Climatic and Biological Factors
    (2024) Shkromada Oksana; Шкромада Оксана; Fotina Tatiana; Фотіна Тетяна; Ivchenko Viktoriia; ‪Івченко Вікторія; Chivanov Vadym; Чіванов Вадим; Sirobaba Vitaliy; Сіробаба Віталій; Shvets Olha; Pikhtirova Alina; Піхтірьова Аліна; Babenko Olena Mykhailivna; Бабенко Олена Михайлівна; Vorobiova Inna; Воробйова Інна; Dychenko Tetiana; Диченко Тетяна
    The object of this study was con-crete samples of the cathedral and wall frescoes. The study solved the problem related to the destruction of concrete and wall frescoes under the long-term influence of biochemical and climatic factors.Samples of concrete for research and wall murals were obtained from a historic listed building. Using microbiological studies and scan-ning electron microscopy, dam-age to wall murals and concrete by microscopic fungi was established: Aspergillus fumigatus, Penicillium brevicompactum, Aspergillus niger, Cladosporium sphaerospermum.The study of concrete samples by the TPD-MS method showed the presence of an increased level of moisture and carbon compounds by 20 % in the test samples, compared to control. The sulfur content in all concrete samples was not signifi-cant. Determination of the mineral composition of concrete by X-ray diffraction showed the presence of Al2O3, 36–44 %, which indicates a significant clay content. The pres-ence of NiTi, 53 %, and СoMg7O8, 46 %, in the concrete sample indi-cates the probable migration of the chemical elements of the paint pig-ments used to decorate the cathe-dral. The concrete control sample contained a significant amount of SiO2, up to 51 %, which is the main component of sand. A feature of the work is the determination of the cor-rosion effect on concrete under pro-longed exposure to climatic and bio-logical factors. The present study is distinguished by the use of non-de-structive methods: microbiological studies, scanning electron micros-copy, TPD-MS and X-ray diffrac-tion to determine the destruction of concrete and wall frescoes of the building, which is a cultural heri-tage. The results of the study could be applied to the development and planning of restoration works for the restoration of buildings that have historical value.