Structural Mechanics of Engineering Constructions and BuildingsStructural Mechanics of Engineering Constructions and BuildingsСтроительная механика инженерных конструкций и сооружений1815-52352587-8700Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)4456410.22363/1815-5235-2025-21-1-62-70IXDZAOConstruction materials and productsСтроительные материалы и изделияResearch ArticleEffect of Ultrafine Additives on Mechanical Properties of ConcreteВлияние ультрадисперсных добавок на механические свойства бетонаhttps://orcid.org/0000-0002-6939-16582680-1505MalkovaMarianna Yu.МальковаМарианна Юрьевна

Doctor of Technical Sciences, Professor of the Department of Mechanical Engineering Technologies, Engineering Academy

доктор технических наук, профессор кафедры машиностроительных технологий, инженерная академия

marianna300@yandex.ruhttps://orcid.org/0000-0002-8844-73973987-3902GorshkovAlexander S.ГоршковАлександр Сергеевич

Assistant of the Department of Architecture, Restoration and Design, Engineering Academy

ассистент кафедры архитектуры, реставрации и дизайна, инженерная академия

gorshkov_as@pfur.ruhttps://orcid.org/0000-0001-7787-82902873-6465ZadiranovAlexander N.ЗадирановАлександр Никитович

Doctor of Technical Sciences, Professor of the Department of Combustion Processes and Environmental Safety, Educational and Scientific Complex of Combustion Processes and Environmental Safety

доктор технических наук, профессор кафедры общей и специальной химии, Учебно-научный комплекс процессов горения и экологической безопасности

zadiranov@mail.ruhttps://orcid.org/0000-0002-4906-5919LarionovEvgeny A.ЛарионовЕвгений Алексеевич

Doctor of Technical Sciences, Professor of the Department of Construction Technology and Structural Materials, Engineering Academy

доктор технических наук, профессор кафедры технологий строительства и конструкционных материалов, инженерная академия

evgenylarionov39@yandex.ruRUDN UniversityРоссийский университет дружбы народовAcademy of State Fire Service EMERCOM of RussiaАкадемия государственной противопожарной службы МЧС России25042025211627011062025Copyright ©; 2025, Malkova M.Y., Gorshkov A.S., Zadiranov A.N., Larionov E.A.Copyright ©; 2025, Малькова М.Ю., Горшков А.С., Задиранов А.Н., Ларионов Е.А.2025Malkova M.Y., Gorshkov A.S., Zadiranov A.N., Larionov E.A.Малькова М.Ю., Горшков А.С., Задиранов А.Н., Ларионов Е.А.https://creativecommons.org/licenses/by-nc/4.0https://journals.rudn.ru/structural-mechanics/article/view/44564

The study is aimed at assessing the mechanical properties of concrete modified with ultrafine powders produced from construction waste by fine grinding. To achieve this goal, concrete samples with different contents of ultrafine powders in the cement matrix were prepared and tested. The mechanical properties of the samples were assessed in terms of compressive strength and modulus of elasticity. The tests were carried out on concrete samples aged for 7, 14, 21 and 28 days, followed by an analysis of the average values of the three measurements for each time point. The results of the study showed that concrete mixtures containing ultrafine powders have improved mechanical properties compared to control samples. The optimal content of ultrafine powders is 20% of the cement weight. The compressive strength of such concrete samples exceeds the reference values by 46% after 28 days of hardening. This indicates the possibility of using ultrafine powders to improve the performance of concrete structures. Experimental studies have shown that the size, concentration, and chemical composition of ultrafine particles significantly affect the mechanical properties of concrete mixtures modified with ultrafine powders of construction waste

Исследование направлено на оценку механических характеристик бетона, модифицированного ультрадисперсными порошками, произведенными из строительных отходов методом тонкого помола. Для достижения цели были изготовлены и испытаны образцы бетона с различным содержанием ультрадисперсных порошков в цементной матрице. Механические свойства образцов оценивались по показателям прочности на сжатие и модулю упругости. Испытания проводились на образцах бетона, выдержанных в течение 7, 14, 21 и 28 сут, с последующим анализом средних значений трех измерений для каждой временной точки. Результаты исследования показали, что бетонные смеси, содержащие ультрадисперсные порошки, обладают улучшенными механическими характеристиками по сравнению с контрольными образцами. Оптимальное содержание ультрадисперсных порошков составляет 20 % от массы цемента. Прочность на сжатие таких бетонных образцов через 28 дней твердения превосходит контрольные значения на 46 %. Это свидетельствует о возможности использования ультрадисперсных порошков для повышения эксплуатационных качеств бетонных конструкций. В рамках экспериментальных исследований установлено, что размер, концентрация и химический состав ультрадисперсных частиц существенно влияют на механические свойства бетонных смесей, модифицированных ультрадисперсными порошками строительных отходов.

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