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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">sat</journal-id><journal-title-group><journal-title xml:lang="ru">НАУКА и ТЕХНИКА</journal-title><trans-title-group xml:lang="en"><trans-title>Science &amp; Technique</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2227-1031</issn><issn pub-type="epub">2414-0392</issn><publisher><publisher-name>Belarusian National Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21122/2227-1031-2016-15-6-460-468</article-id><article-id custom-type="elpub" pub-id-type="custom">sat-958</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>СТРОИТЕЛЬСТВО</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CIVIL AND INDUSTRIAL ENGINEERING</subject></subj-group></article-categories><title-group><article-title>РАСЧЕТ СОСТАВА БЕТОНА ЖЕЛЕЗОБЕТОННЫХ КОНСТРУКЦИЙ, ЭКСПЛУАТИРУЮЩИХСЯ  В УСЛОВИЯХ КЛАССА ХС1, В ЗАВИСИМОСТИ ОТ ТОЛЩИНЫ ЗАЩИТНОГО СЛОЯ</article-title><trans-title-group xml:lang="en"><trans-title>CONCRETE MIX DESIGN FOR STRUCTURES SUBJECTED TO EXPOSURE CLASS XC1 DEPENDING ON CONCRETE COVER</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чернякевич</surname><given-names>О. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Cherniakevich</surname><given-names>O. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Адрес для переписки: Чернякевич Оксана Юзефовна – КУП «Брестжилстрой», ул. Гоздецкого, 11, 224028, г. Брест, Республика Беларусь Тел.: +375 162 53-07-90   cherniakevich@tut.by</p></bio><bio xml:lang="en"><p>Address for correspondence: Cherniakevich Oksana Yu. – CIE (Communal Unitary Enterprise) “Brestzhilstroy”, 11 Gozdetsky str., 224028, Brest, Republic of Belarus Tel.: +375 162 53-07-90   cherniakevich@tut.by</p></bio><email xlink:type="simple">cherniakevich@tut.by</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>Леонович</surname><given-names>С. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Leonovich</surname><given-names>S. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Доктор технических наук, профессор</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Брестжилстрой</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Brestzhilstroj</institution><country>Belarus</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Белорусский национальный технический университе</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Belarusian National Technical University</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2016</year></pub-date><pub-date pub-type="epub"><day>09</day><month>12</month><year>2016</year></pub-date><volume>15</volume><issue>6</issue><fpage>460</fpage><lpage>468</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Чернякевич О.Ю., Леонович С.Н., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Чернякевич О.Ю., Леонович С.Н.</copyright-holder><copyright-holder xml:lang="en">Cherniakevich O.Y., Leonovich S.N.</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://sat.bntu.by/jour/article/view/958">https://sat.bntu.by/jour/article/view/958</self-uri><abstract><p>Коррозия арматуры – важнейшая проблема долговечности железобетонных конструкций, как правило, обусловливается карбонизацией окружающего ее бетона. Из-за различий в условиях изготовления и эксплуатации конструкций расчет защитного слоя бетона на стадии проектирования является прогнозным. Применение вероятностных методов к моделированию процесса карбонизации позволяет получать прогнозные оценки глубины карбонизации бетона и, как следствие, назначать минимальную толщину защитного слоя бетона для заданного расчетного срока эксплуатации конструкций. В статье описаны правила подбора состава бетона под определенные классы по прочности, рассмотрены действующие рекомендации по назначению классов бетона по прочности и требуемой толщины защитного слоя. В европейских нормах EN 206:2013 приводятся требования к максимальному значению водоцементного отношения, минимальному содержанию цемента и минимальному классу бетона по прочности в соответствии  с классом ХС1 по условиям эксплуатации. Поскольку данный стандарт не содержит обоснований этих требований, авторами предпринята попытка получить их научное подтверждение. При решении такой задачи использовали вероятностное моделирование процессов карбонизации бетона для составов, рассчитанных по программе ВТК-коррозия. Выполнен вероятностный расчет глубины карбонизации бетона для железобетонных конструкций с защитным слоем бетона 20–35 мм для наиболее неблагоприятных условий в рамках класса ХС1 по условиям эксплуатации.</p></abstract><trans-abstract xml:lang="en"><p>The reinforced steel corrosion which is the most important problem of reinforced concrete structures durability is generally stipulated for carbonization of concrete surrounding it. Concrete cover calculation at the design stage is predicated one because of the differences in manufacturing conditions and use of constructions. The applying of the probabilistic approaches to the carbonation process modeling allows to get predicated grade of the depth of carbonization of concrete and, thus, to settle minimum concrete cover thickness for a given projected service life of a construction. The procedures for concrete mix design for different strength classes of concrete are described in the article. Current recommendations on assignment of concrete strength class as well as concrete cover are presented. The European Standard EN 206:2013 defines the content requirements for the concrete structures operated in the exposure class XC1, including the minimum values of water-cement ratio, minimum cement content, and minimum strength class of concrete. Since the standard does not include any basis or explanations of the requirements, we made an effort to develop a scientific justification for the mentioned requirements. We developed the probabilistic models for the process of carbonation of concrete based on the concrete mix which was designed using the software VTK-Korroziya. The reinforced concrete structures with concrete cover 20–35 mm operated in the most unfavorable conditions within the exposure class XC1 were analyzed. The corresponding probabilistic calculations of the depth of carbonated concrete are described in the article. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>карбонизация бетона</kwd><kwd>железобетонная конструкция</kwd><kwd>предельное состояние</kwd><kwd>долговечность</kwd><kwd>защитный слой бетона</kwd><kwd>индекс надежности</kwd></kwd-group><kwd-group xml:lang="en"><kwd>concrete corrosion</kwd><kwd>reinforced concrete structure</kwd><kwd>limiting state</kwd><kwd>durability</kwd><kwd>concrete cover</kwd><kwd>safety index</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">Бетонные и железобетонные конструкции: СНБ 5.03.01–2002. Введ. 01.07.2003. Минск: Минстройархитектуры, 2003. 144 с.</mixed-citation><mixed-citation xml:lang="en">SNB  5.03.01–2002 [Construction Norms of the Republic of Belarus]. Concrete and reinforced concrete structures. 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