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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">mgssuvest</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник МГСУ</journal-title><trans-title-group xml:lang="en"><trans-title>Vestnik MGSU</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1997-0935</issn><issn pub-type="epub">2304-6600</issn><publisher><publisher-name>Moscow State University of Civil Engineering (National Research University) (MGSU)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22227/1997-0935.2024.4.569-579</article-id><article-id custom-type="elpub" pub-id-type="custom">mgssuvest-235</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Строительное материаловедение</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Construction material engineering</subject></subj-group></article-categories><title-group><article-title>Биоминеральные добавки для самозалечивания бетона</article-title><trans-title-group xml:lang="en"><trans-title>Biomineral additives for self-healing of concrete</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4288-2115</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Черных</surname><given-names>Т. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Chernykh</surname><given-names>T. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Тамара Николаевна Черных — доктор технических наук, доцент, профессор кафедры строительных материалов и изделий</p><p>454080, г. Челябинск, пр-т Ленина, д. 76</p><p>РИНЦ ID: 4731125, Scopus: 6508381737, ResearcherID: K-8568-2014</p></bio><bio xml:lang="en"><p>Tamara N. Chernykh — Doctor of Technical Sciences, Associate Professor, Professor of the Department of Building Materials and Products</p><p>76 Lenina prospekt, Chelyabinsk, 454080</p><p>ID RSCI: 4731125, Scopus: 6508381737, ResearcherID: K-8568-2014</p></bio><email xlink:type="simple">chernykhtn@susu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Горбачевских</surname><given-names>К. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Gorbachevskykh</surname><given-names>K. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кирилл Алексеевич Горбачевских — студент Архитектурно-строительного института</p><p>454080, г. Челябинск, пр-т Ленина, д. 76</p></bio><bio xml:lang="en"><p>Kirill A. Gorbachevskykh — student of the Institute of Architecture and Civil Engineering</p><p>76, Lenina prospekt, Chelyabinsk, 454080</p></bio><email xlink:type="simple">kirill38964@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6425-4531</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Криушин</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kriushin</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михаил Владимирович Криушин — младший научный сотрудник кафедры строительных материалов и изделий</p><p>454080, г. Челябинск, пр-т Ленина, д. 76</p><p>РИНЦ ID: 1147146, ResearcherID: AGU 7556-2022</p></bio><bio xml:lang="en"><p>Mikhail V. Kriushin — junior researcher Department of Building Materials and Products</p><p>76, Lenina prospekt, Chelyabinsk, 454080</p><p>ID RSCI: 1147146, ResearcherID: AGU 7556-2022</p></bio><email xlink:type="simple">kriushinmv@susu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4505-1587</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Орлов</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Orlov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Анатольевич Орлов — кандидат технических наук, доцент, заведующий кафедрой строительных материалов и изделий</p><p>454080, г. Челябинск, пр-т Ленина, д. 76</p><p>Scopus: 56486973500, ResearcherID: K-8880-2014</p></bio><bio xml:lang="en"><p>Aleksander A. Orlov — Candidate of Technical Sciences, Associate Professor, Head of the Department of Building Materials and Products</p><p>76, Lenina prospekt, Chelyabinsk, 454080</p><p>Scopus: 56486973500, ResearcherID: K-8880-2014</p></bio><email xlink:type="simple">orlovaa@susu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2431-8358</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Комелькова</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Komelkova</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мария Владимировна Комелькова — доктор биологических наук, доцент, старший научный сотрудник Научно-образовательного Российско-Китайского центра системной патологии</p><p>454080, г. Челябинск, пр-т Ленина, д. 76</p><p>РИНЦ ID: 821160, Scopus: 57188550625, ResearcherID: M-6294-2016</p></bio><bio xml:lang="en"><p>Maria V. Komelkova — Doctor of Technical Sciences, Senior Research Associate of the Scientific and Educational Russian-Chinese Center for Systemic Pathology</p><p>76, Lenina prospekt, Chelyabinsk, 454080</p><p>ID RSCI: 821160, Scopus: 57188550625, ResearcherID: M-6294-2016</p></bio><email xlink:type="simple">komelkovamv@susu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9403-3481</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Платковский</surname><given-names>П. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Platkovskii</surname><given-names>P. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Павел Олегович Платковский — лаборант Научно-образовательного Российско-Китайского центра системной патологии</p><p>454080, г. Челябинск, пр-т Ленина, д. 76</p><p>РИНЦ ID: 934627, Scopus: 57197762232</p></bio><bio xml:lang="en"><p>Pavel O. Platkovskii — laboratory assistant of the Scientific and Educational Russian-Chinese Center for Systemic Pathology</p><p>76, Lenina prospekt, Chelyabinsk, 454080</p><p>ID RSCI: 934627, Scopus: 57197762232</p></bio><email xlink:type="simple">paw.platkovski@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Южно-Уральский государственный университет (национальный исследовательский университет) (ЮУрГУ (НИУ))</institution><country>Россия</country></aff><aff xml:lang="en"><institution>South Ural State University (National Research University) (SUSU (NRU))</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>29</day><month>04</month><year>2024</year></pub-date><volume>19</volume><issue>4</issue><fpage>569</fpage><lpage>579</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Черных Т.Н., Горбачевских К.А., Криушин М.В., Орлов А.А., Комелькова М.В., Платковский П.О., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Черных Т.Н., Горбачевских К.А., Криушин М.В., Орлов А.А., Комелькова М.В., Платковский П.О.</copyright-holder><copyright-holder xml:lang="en">Chernykh T.N., Gorbachevskykh K.A., Kriushin M.V., Orlov A.A., Komelkova M.V., Platkovskii P.O.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.vestnikmgsu.ru/jour/article/view/235">https://www.vestnikmgsu.ru/jour/article/view/235</self-uri><abstract><sec><title>Введение</title><p>Введение. Рассмотрены причины снижения долговечности изгибаемых конструкций через призму нарушения защитного слоя арматуры, который в первую очередь нарушается при образовании трещин. Трещины могут самозалечиваться различными методами, наиболее эффективным из которых является микробно-индуцированное осаждение карбоната кальция.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Использованы штаммы Bacillus subtilis VKM B-70 и VKM B-501 (всероссийская коллекция микроорганизмов), микрокремнезем, метакаолин, золу уноса. Оценка выживаемости бактерий провена путем культивирования бактериальных штаммов из образцов-таблеток. Определение pH образцов выполнено с помощью pH-метра. Оценка скорости зарастания трещин осуществлена путем визуального осмотра образцов-таблеток  под оптическим микроскопом.</p></sec><sec><title>Результаты</title><p>Результаты. Привены результаты эксперимента по подбору оптимального размера альгинатных бактериальных гранул для биоминеральной добавки. Изучено влияние биоминеральных добавок различного состава на зарастание трещин шириной от 100 до 500 мкм. Показано эффект повышения активности бактерий в присутствии пуццоланового компонента, выявлена связь щелочности среды образца и активности бактерий.</p></sec><sec><title>Выводы</title><p>Выводы. Рекомендуемым диаметром гранул с точки зрения обеспечения прочности, вероятности залечивания трещин и технологических причин является диапазон 1–1,8 мм. Активность бактерий в таких гранулах увеличивается при наличии в составе добавки пуццоланового компонента. Зола уноса по сравнению с другими видами пуццолановых добавок наиболее эффективна в составах с бактериями Bacillus subtilis из-за способности снижать щелочность цементно-песчаных композиций, создавая более благоприятные условия для жизнедеятельности бактерий. При использовании комплексных биоминеральных добавок происходит значительное увеличение скорости зарастания трещин, что позволяет обеспечить закрытие трещин шириной 100 мкм всего за 5 циклов «вода – воздух».</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. The reasons for the reduction of durability of flexural structures due to the violation of the protective layer of reinforcement are considered. It breaks down when cracks form. Cracks can self-heal by various methods, the most effective of which is microbial-induced precipitation of calcium carbonate.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. Bacillus subtilis strains VKM B-70 and VKM B-501 (All-Russian Collection of Microorganisms), microsilica, metakaolin, and fly ash were used. Bacterial activity was assessed by culturing bacterial strains from tablet specimens. The pH of the specimens was determined using the pH meter. The crack growth rate was assessed by visual inspection of the tablet specimens by the optical microscope.</p></sec><sec><title>Results</title><p>Results. The results of the experiment on selection of optimal size of alginate bacterial granules for biomineral additives are shown. The effect of biomineral additives of various compositions on the overgrowth of cracks with a width of 100 to 500 µm was studied. The effect of increasing bacterial activity in the presence of the pozzolanic component is shown. The relationship between the alkalinity of the specimen medium and bacterial activity was revealed.</p></sec><sec><title>Conclusions</title><p>Conclusions. The recommended granule diameter is 1–1.8 mm. The bacterial activity in such granules increases in the presence of pozzolanic component in the composition of the additive. Fly ash was most effective in formulations with Bacillus subtilus bacteria due to its ability to lower the pH of cement-sand compositions. By lowering the pH, conditions that are more favourable are created for the vital activity of bacteria. When using complex biomineral additives, there is a significant increase in the rate of crack healing, which will allow self-healing of cracks with a width of 100 microns in just five water-air cycles.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>Bacillus subtilis</kwd><kwd>пуццолановые добавки</kwd><kwd>самовосстановление</kwd><kwd>самозалечивание</kwd><kwd>трещины</kwd><kwd>бетон</kwd><kwd>раствор</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Bacillus subtilis</kwd><kwd>pozzolanic additives</kwd><kwd>self-healing</kwd><kwd>cracks</kwd><kwd>concrete</kwd><kwd>mortar</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке Министерства науки и высшего образования Российской Федерации (государственное задание на выполнение фундаментальных научных исследований № FENU-2023-0012 (2023012ГЗ)).</funding-statement><funding-statement xml:lang="en">The study was financially supported by the Ministry of Science and Higher Education of the Russian Federation (State Assignment for Basic Research No. FENU-2023-0012 (2023012ГЗ)).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Aytekin B., Mardani A., Yazıcı Ş. 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