constructionСтроительство и реконструкцияBuilding and Reconstruction2073-7416Орловский государственный университет имени И.С. Тургенева10.33979/2073-7416-2026-124-2-109-119construction-1057Research ArticleСТРОИТЕЛЬНЫЕ МАТЕРИАЛЫ И ТЕХНОЛОГИИCONSTRUCTION MATERIALS AND TECHNOLOGIESДеформации усадки и трещиностойкость бетонов, модифицированных уреазными биодобавкамиShrinkage deformation and crack resistance of concrete modified with urease bioadditivesЕрофеевВ. Т.YerofeyevV. T.

Ерофеев Владимир Трофимович – доктор технических наук, профессор, профессор кафедры строительных материалов

г. Москва

Yerofeyev, Vladimir T., Doctor of Technical Sciences, Professor, Professor of the Department of Building Materials

Moscow

yarofeevvt@mail.ruДергуноваЕ. С.DergunovaE. S.

Дергунова Елена Сергеевна – кандидат химических наук, доцент

г. Липецк

Dergunova Elena S., Candidate of Chemical Sciences, Associate Professor 

Lipetsk

dergunova14@yandex.ruГончароваМ. А.GoncharovaM. A.

Гончарова Маргарита Александровна – доктор технических наук, профессор, заведующий кафедрой строительного материаловедения и дорожных технологий 

г. Липецк

Goncharova Margarita A., Doctor of Technical Sciences, Professor, Head of the Department of Building Materials Science and Road Technologies 

Lipetsk

magoncharova777@yandex.ruДергуноваВ. В.DergunovaV. V.

 

Дергунова Валентина Витальевна – студент кафедры химии 

г. Липецк

Dergunova Valentina V., Student of the Department of Chemistry 

Lipetsk

valedergunova@yandex.ruФГБОУ ВО «Национальный исследовательский Московский государственный строительный университет»РоссияMoscow State University of Civil EngineeringRussian FederationФГБОУ ВО «Липецкий государственный технический университет»РоссияLipetsk State Technical UniversityRussian Federation20261505202602109119Copyright © Ерофеев В.Т., Дергунова Е.С., Гончарова М.А., Дергунова В.В., 20262026Ерофеев В.Т., Дергунова Е.С., Гончарова М.А., Дергунова В.В.Yerofeyev V.T., Dergunova E.S., Goncharova M.A., Dergunova V.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://construction.elpub.ru/jour/article/view/1057

Статья посвящена изучению влияния уреазных биодобавок на трещиностойкость и деформацию усадки бетонов. Образцы изготавливались путем модифицирования уреазыми микроорганизмами Sporosarcina pasteurii и Sporosarcina ureae, продуцирующих фермент уреазу. Оценены свойства бетонных смесей по таким показателям как удобоукладываемость и подвижность. Изучена поверхность среза образцов модифицированного бетона, исследовалось поровое пространство с применением оптического и сканирующего электронного микроскопов, идентифицировано образование новой фазы в поровом пространстве. Установлено, что применение уреазных добавок способствует снижению величины усадки бетона и повышению его трещиностойкости, а также прочность при растяжении на изгибе повышается более чем на 30 %, модуль упругости бетона возрастает в 1,5 раза. Эффект упрочнения поровой структуры материалы достигается за счет образования карбоната кальция в результате жизнедеятельности бактерий. Полученные результаты открывают перспективы для разработки экологически чистых и эффективных методов улучшения свойств строительных материалов

This article examines the effect of urease bioadditives on the crack resistance and shrinkage deformation of concrete. The study involved introducing the urease-producing microorganisms Sporosarcina pasteurii and Sporosarcina ureae into the concrete mix. The properties of the concrete mixes were assessed for workability and flowability. The cut surfaces of modified concrete samples were examined, and the pore space was examined using optical and scanning electron microscopes to identify the formation of a new phase in the pore space. It was found that the use of urease additives reduces concrete shrinkage and improves its crack resistance, increases flexural strength by more than 30%, and increases the elastic modulus of concrete by 1.5 times. This is achieved through the formation of calcium carbonate as a result of bacterial activity, which strengthens the structure of the material. The results obtained open up prospects for the development of environmentally friendly and effective methods for improving the properties of building materials

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The authors declare that there are no conflicts of interest present.