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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">10.22227/1997-0935.2024.4.596-605</article-id><article-id custom-type="elpub" pub-id-type="custom">mgssuvest-237</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>Моделирование влияния параметров массопереноса на кинетику коррозионного взаимодействия бетона с биологическими средами</article-title><trans-title-group xml:lang="en"><trans-title>Modelling the influence of mass transfer parameters on the kinetics of corrosion interaction of concrete and biological media</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6117-7529</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Федосов</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Fedosov</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Викторович Федосов — доктор технических наук, профессор кафедры технологий и организации строительного производства, академик РААСН</p><p>129337, г. Москва, Ярославское шоссе, д. 26</p><p>РИНЦ ID: 105900, Scopus: 7005670404, ResearcherID: B-2409-2017</p></bio><bio xml:lang="en"><p>Sergey V. Fedosov — Doctor of Technical Sciences, Professor of the Department of Technology and Organization of Construction Production, Academician of RAASN</p><p>26 Yaroslavskoe shosse, Moscow, 129337</p><p>ID RSCI: 105900, Scopus: 7005670404, Researcher ID: B-2409-2017</p></bio><email xlink:type="simple">fedosovsv@mgsu.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/0000-0002-4644-6353</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Нармания</surname><given-names>Б. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Narmaniya</surname><given-names>B. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Борис Евгеньевич Нармания — аспирант кафедры технологий и организации строительного производства</p><p>129337, г. Москва, Ярославское шоссе, д. 26</p><p>РИНЦ ID: 932757, Scopus: 57215532142, ResearcherID: HKP-1695-2023</p></bio><bio xml:lang="en"><p>Boris E. Narmaniya — postgraduate student of the Department of Technology and Organization of Construction Production</p><p>26 Yaroslavskoe shosse, Moscow, 129337</p><p>ID RSCI: 932757, Scopus: 57215532142, ResearcherID: HKP-1695-2023</p></bio><email xlink:type="simple">borisfablee@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский Московский государственный строительный университет (НИУ МГСУ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow State University of Civil Engineering (National Research University) (MGSU)</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>596</fpage><lpage>605</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Федосов С.В., Нармания Б.Е., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Федосов С.В., Нармания Б.Е.</copyright-holder><copyright-holder xml:lang="en">Fedosov S.V., Narmaniya B.E.</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/237">https://www.vestnikmgsu.ru/jour/article/view/237</self-uri><abstract><sec><title>Введение</title><p>Введение. Воздействие микроорганизмов на цементный камень (ЦК) бетона ускоряет вывод «свободного гидроксида кальция» из поровой структуры и способствует разложению кальцийсодержащих фаз, в результате чего происходит снижение прочностных характеристик бетона и дальнейшее разрушение. Биоповреждение необходимо учитывать при определении долговечности бетона.  Математическое моделирование позволяет на любом этапе жизненного цикла бетонного изделия спрогнозировать его состояние и установить остаточный срок службы.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Влияние параметров массопереноса на изменение концентраций гидроксида кальция в бетоне и на интенсивность его вымывания в жидкую среду показано графически по результатам численного моделирования. Разработана математическая модель для описания процессов массопереноса при биологической коррозии бетона, в которой влияние микроорганизмов и продуктов их жизнедеятельности объясняется внутренним источником поглощения или высвобождения массы, в частности «свободного гидроксида кальция», в бетонном ЦК. Условия достижения значений концентраций гидроксида кальция в ЦК, соответствующих началу разложения высокоосновных составляющих, описываются с помощью решения задачи массообмена.</p></sec><sec><title>Результаты</title><p>Результаты. На основе математической модели, описывающей кинетику массопереноса, разработан математический аппарат для прогнозирования степени биодеградации цементных бетонов. Представлены графические зависимости, которые являются результатом имитационного численного эксперимента. Они описывают для широкого диапазона параметров системы влияние критериев подобия (Фурье, Био) и коэффициента, учитывающего фазовые характеристики, на динамику и кинетику процесса массопереноса при биокоррозии бетона. Наиболее интенсивное изменение кинетики и динамики массообмена наблюдается на начальных стадиях воздействия продуктов жизнедеятельности микроорганизмов при жидкостной коррозии бетона.</p></sec><sec><title>Выводы</title><p>Выводы. Полученные графические зависимости дают понимание об условиях замедления и интенсификации процессов массопереноса в системе «бетон – биопленка – жидкая среда». Инженерная методика расчета параметров массообмена и срока службы бетона применима на любом этапе эксплуатации железобетонных изделий и конструкций и дает возможность экономически обоснованно назначать средства защиты и устанавливать сроки их использования.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. The impact of microorganisms on the cement stone of concrete accelerates the removal of “free calcium hydroxide” from the pore structure and promotes the decomposition of calcium-containing phases, resulting in a decrease in the strength characteristics of concrete and further destruction. Biodegradation must be taken into account when determining the durability of concrete. Mathematical modelling makes it possible to predict its condition at any stage of the life cycle of a concrete product and to establish its remaining service life.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. The effect of mass transfer parameters on changes in calcium hydroxide concentrations in concrete and on the intensity of its leaching into a liquid medium is shown graphically by the results of numerical modelling. The description of mass transfer processes in concrete biocorrosion was carried out using a developed mathematical model, which takes into account the influence of microorganisms and their waste products as an internal source of absorption or release of mass of “free calcium hydroxide” in concrete cement stone. The conditions for reaching the values of calcium hydroxide concentrations in cement stone corresponding to the beginning of decomposition of highly basic components are described by solving the mass transfer problem.</p></sec><sec><title>Results</title><p>Results. Based on the mathematical model describing the kinetics of mass transfer, a mathematical apparatus for predicting the degree of biodegradation of cement concrete was developed. Graphical dependences are presented, which are the result of a simulated numerical experiment, describing the effect of similarity criteria (Fourier, Bio) and a coefficient taking into account phase characteristics on the dynamics and kinetics of the mass transfer process during concrete biodegradation in a wide range of system parameters. The most intense change in the kinetics and dynamics of mass transfer occurs at the initial stages of exposure to the products of microorganisms during liquid corrosion of concrete.</p></sec><sec><title>Conclusions</title><p>Conclusions. The obtained graphical dependences provide an understanding of the conditions for slowing down and intensifying mass transfer processes in the concrete – biofilm – liquid medium system. The engineering methodology of calculation of mass transfer parameters and service life of concrete is applicable at any stage of operation of reinforced concrete products and structures and makes it economically feasible to assign protective equipment and set the terms of their use.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>биокоррозия бетона</kwd><kwd>долговечность бетона</kwd><kwd>процессы массопереноса</kwd><kwd>кинетика массопереноса</kwd><kwd>прогнозирование долговечности</kwd><kwd>уравнения массопроводности</kwd><kwd>математическое моделирование</kwd><kwd>графическое моделирование</kwd><kwd>параметры массопереноса</kwd><kwd>выщелачивание бетона</kwd></kwd-group><kwd-group xml:lang="en"><kwd>concrete biocorrosion</kwd><kwd>concrete durability</kwd><kwd>mass transfer processes</kwd><kwd>mass transfer kinetics</kwd><kwd>durability prediction</kwd><kwd>mass transfer equations</kwd><kwd>mathematical modelling</kwd><kwd>graphical modelling</kwd><kwd>mass transfer parameters</kwd><kwd>concrete leaching</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Wang C., Roy A., Silberschmidt V.V., Chen Z. 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