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A Numerical Reactive Flow and Transport Model for Cementation Processes in Bio-concrete Production.

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Title: A Numerical Reactive Flow and Transport Model for Cementation Processes in Bio-concrete Production.
Authors: Hommel, Johannes1 (AUTHOR) johannes.hommel@iws.uni-stuttgart.de, Bozkurt, Kerem1 (AUTHOR) kerem.bozkurt@iws.uni-stuttgart.de, Nething, Christoph2 (AUTHOR) christoph.nething@ilek.uni-stuttgart.de, Eppinger, Erik3 (AUTHOR) erik.eppinger@imb.uni-stuttgart.de, Wang, Yue1 (AUTHOR) yue.wang@iws.uni-stuttgart.de, Blandini, Lucio2 (AUTHOR) lucio.blandini@ilek.uni-stuttgart.de, Class, Holger1 (AUTHOR) holger.class@iws.uni-stuttgart.de
Source: Transport in Porous Media. Oct2026, Vol. 153 Issue 7, p1-30. 30p.
Subjects: Reactive flow, Calcium carbonate, Calcite, Computer simulation, Cement, Transport theory, Porosity, Cement composites
Abstract: Concrete is the most widely used construction material worldwide, yet Portland-cement production accounts for approximately 8% of global CO 2 emissions. Bio-cementation processes based on calcium carbonate precipitation offer a promising low-carbon alternative, but their engineering application is limited by a lack of predictive models for coupled transport, reaction, and cementation processes. This study presents a 1D numerical model for bio-concrete production using urease-active calcite powder (UACP). Unlike previous models based on in-situ bacterial growth, urease is initially and homogeneously distributed by mixing UACP with sand, reducing model complexity in terms of the number of degrees of freedom. The model captures the coupled evolution of fluid flow, ureolysis-driven carbonate precipitation, and porosity–permeability reduction, with a novel conceptual formulation to limit the ureolysis rate for agreement with experiments. Parameters are calibrated using a selected quasi-1D experiment and validated against four additional setups. The model predicts whether cementation is complete or incomplete and reproduces final average porosities with errors below 7.5%. The model already captures the dominant processes governing UACP-based bio-cementation and provides a reliable basis for in-silico optimization of injection strategies and process parameters. It also serves as a foundation for further refinement and extension to multidimensional systems, supporting the development and scale-up of bio-cemented materials in geotechnical and construction applications. [ABSTRACT FROM AUTHOR]
Copyright of Transport in Porous Media is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 195412124
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: A Numerical Reactive Flow and Transport Model for Cementation Processes in Bio-concrete Production.
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  Data: <searchLink fieldCode="AR" term="%22Hommel%2C+Johannes%22">Hommel, Johannes</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> johannes.hommel@iws.uni-stuttgart.de</i><br /><searchLink fieldCode="AR" term="%22Bozkurt%2C+Kerem%22">Bozkurt, Kerem</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> kerem.bozkurt@iws.uni-stuttgart.de</i><br /><searchLink fieldCode="AR" term="%22Nething%2C+Christoph%22">Nething, Christoph</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> christoph.nething@ilek.uni-stuttgart.de</i><br /><searchLink fieldCode="AR" term="%22Eppinger%2C+Erik%22">Eppinger, Erik</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> erik.eppinger@imb.uni-stuttgart.de</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Yue%22">Wang, Yue</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yue.wang@iws.uni-stuttgart.de</i><br /><searchLink fieldCode="AR" term="%22Blandini%2C+Lucio%22">Blandini, Lucio</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> lucio.blandini@ilek.uni-stuttgart.de</i><br /><searchLink fieldCode="AR" term="%22Class%2C+Holger%22">Class, Holger</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> holger.class@iws.uni-stuttgart.de</i>
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  Data: <searchLink fieldCode="JN" term="%22Transport+in+Porous+Media%22">Transport in Porous Media</searchLink>. Oct2026, Vol. 153 Issue 7, p1-30. 30p.
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  Data: <searchLink fieldCode="DE" term="%22Reactive+flow%22">Reactive flow</searchLink><br /><searchLink fieldCode="DE" term="%22Calcium+carbonate%22">Calcium carbonate</searchLink><br /><searchLink fieldCode="DE" term="%22Calcite%22">Calcite</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Cement%22">Cement</searchLink><br /><searchLink fieldCode="DE" term="%22Transport+theory%22">Transport theory</searchLink><br /><searchLink fieldCode="DE" term="%22Porosity%22">Porosity</searchLink><br /><searchLink fieldCode="DE" term="%22Cement+composites%22">Cement composites</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Concrete is the most widely used construction material worldwide, yet Portland-cement production accounts for approximately 8% of global CO 2 emissions. Bio-cementation processes based on calcium carbonate precipitation offer a promising low-carbon alternative, but their engineering application is limited by a lack of predictive models for coupled transport, reaction, and cementation processes. This study presents a 1D numerical model for bio-concrete production using urease-active calcite powder (UACP). Unlike previous models based on in-situ bacterial growth, urease is initially and homogeneously distributed by mixing UACP with sand, reducing model complexity in terms of the number of degrees of freedom. The model captures the coupled evolution of fluid flow, ureolysis-driven carbonate precipitation, and porosity–permeability reduction, with a novel conceptual formulation to limit the ureolysis rate for agreement with experiments. Parameters are calibrated using a selected quasi-1D experiment and validated against four additional setups. The model predicts whether cementation is complete or incomplete and reproduces final average porosities with errors below 7.5%. The model already captures the dominant processes governing UACP-based bio-cementation and provides a reliable basis for in-silico optimization of injection strategies and process parameters. It also serves as a foundation for further refinement and extension to multidimensional systems, supporting the development and scale-up of bio-cemented materials in geotechnical and construction applications. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Transport in Porous Media is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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        Value: 10.1007/s11242-026-02336-y
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      – Code: eng
        Text: English
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        PageCount: 30
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      – SubjectFull: Reactive flow
        Type: general
      – SubjectFull: Calcium carbonate
        Type: general
      – SubjectFull: Calcite
        Type: general
      – SubjectFull: Computer simulation
        Type: general
      – SubjectFull: Cement
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      – SubjectFull: Transport theory
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      – SubjectFull: Porosity
        Type: general
      – SubjectFull: Cement composites
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      – TitleFull: A Numerical Reactive Flow and Transport Model for Cementation Processes in Bio-concrete Production.
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              M: 10
              Text: Oct2026
              Type: published
              Y: 2026
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