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Bio-based building materials : how to unravel the role of material characteristics on fungal susceptibility?

Liselotte De Ligne (UGent) , Jan Van den Bulcke (UGent) , Jan Baetens (UGent) , Bernard De Baets (UGent) and Joris Van Acker (UGent)
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Abstract
Bio-based materials are gaining importance in the building industry, as the focus on sustainability and life-cycle-assessment has increased substantially over the last decade. Wood and wood-engineered products as well as insulation materials made from cellulose, wood, flax, hemp, etc. are increasingly used. These materials are made from renewable resources and with considerably lower energy consumption than various other building materials, such as insulation polymers, steel and concrete. As steel can corrode and concrete can rot, so can bio-based building materials degrade over time when exposed to those conditions that favour decay. Since fungi cause not only aesthetical degradation, but can also severely compromise the structural integrity of a building component this is critical for any service life approach. Consequently, a proper understanding of the fungal susceptibility of bio-based materials is needed, both for optimal application of bio-based materials as for the design of new materials. Based on a combination of tests we try to unravel the role of the material’s chemical components, structure and moisture dynamics on its fungal susceptibility, as well as the interaction between those material characteristics. In a first test set-up, the ‘paste test’, the material’s structure is removed and fungal growth is assessed over time in 2D, with only the material’s chemical components playing a role. In the second test set-up, the ‘X-ray CT test’, fungal development is assessed non-destructively in 3D with X-ray CT, giving an indication of moisture production and distribution over time, in relation to the material’s structure. By comparing the results, we have a better idea of how much each material characteristic influences fungal susceptibility. This knowledge can then be used for optimising fungal testing of bio-based materials, ensuring optimal application and providing the building industry with the confidence they need to pave the way to a more sustainable future.
Keywords
Bio-Based Building Materials, Material Characteristics, Fungal Degradation, X-Ray CT

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MLA
De Ligne, Liselotte, et al. “Bio-Based Building Materials : How to Unravel the Role of Material Characteristics on Fungal Susceptibility?” XV International Conference on Durability of Building Materials and Components, (DBMC 2020), Proceedings, edited by C. Serrat et al., International Center for Numerical Methods in Engineering (CIMNE), 2020, pp. 239–46, doi:10.23967/dbmc.2020.195.
APA
De Ligne, L., Van den Bulcke, J., Baetens, J., De Baets, B., & Van Acker, J. (2020). Bio-based building materials : how to unravel the role of material characteristics on fungal susceptibility? In C. Serrat, J. R. Casas, & V. Gibert (Eds.), XV International Conference on Durability of Building Materials and Components, (DBMC 2020), Proceedings (pp. 239–246). Barcelona: International Center for Numerical Methods in Engineering (CIMNE). https://doi.org/10.23967/dbmc.2020.195
Chicago author-date
De Ligne, Liselotte, Jan Van den Bulcke, Jan Baetens, Bernard De Baets, and Joris Van Acker. 2020. “Bio-Based Building Materials : How to Unravel the Role of Material Characteristics on Fungal Susceptibility?” In XV International Conference on Durability of Building Materials and Components, (DBMC 2020), Proceedings, edited by C. Serrat, J. R. Casas, and V. Gibert, 239–46. Barcelona: International Center for Numerical Methods in Engineering (CIMNE). https://doi.org/10.23967/dbmc.2020.195.
Chicago author-date (all authors)
De Ligne, Liselotte, Jan Van den Bulcke, Jan Baetens, Bernard De Baets, and Joris Van Acker. 2020. “Bio-Based Building Materials : How to Unravel the Role of Material Characteristics on Fungal Susceptibility?” In XV International Conference on Durability of Building Materials and Components, (DBMC 2020), Proceedings, ed by. C. Serrat, J. R. Casas, and V. Gibert, 239–246. Barcelona: International Center for Numerical Methods in Engineering (CIMNE). doi:10.23967/dbmc.2020.195.
Vancouver
1.
De Ligne L, Van den Bulcke J, Baetens J, De Baets B, Van Acker J. Bio-based building materials : how to unravel the role of material characteristics on fungal susceptibility? In: Serrat C, Casas JR, Gibert V, editors. XV International Conference on Durability of Building Materials and Components, (DBMC 2020), Proceedings. Barcelona: International Center for Numerical Methods in Engineering (CIMNE); 2020. p. 239–46.
IEEE
[1]
L. De Ligne, J. Van den Bulcke, J. Baetens, B. De Baets, and J. Van Acker, “Bio-based building materials : how to unravel the role of material characteristics on fungal susceptibility?,” in XV International Conference on Durability of Building Materials and Components, (DBMC 2020), Proceedings, Barcelona, Spain, 2020, pp. 239–246.
@inproceedings{8680756,
  abstract     = {Bio-based materials are gaining importance in the building industry, as the focus on sustainability and life-cycle-assessment has increased substantially over the last decade. Wood and wood-engineered products as well as insulation materials made from cellulose, wood, flax, hemp, etc. are increasingly used. These materials are made from renewable resources and with considerably lower energy consumption than various other building materials, such as insulation polymers, steel and concrete. As steel can corrode and concrete can rot, so can bio-based building materials degrade over time when exposed to those conditions that favour decay. Since fungi cause not only aesthetical degradation, but can also severely compromise the structural integrity of a building component this is critical for any service life approach. Consequently, a proper understanding of the fungal susceptibility of bio-based materials is needed, both for optimal application of bio-based materials as for the design of new materials. Based on a combination of tests we try to unravel the role of the material’s chemical components, structure and moisture dynamics on its fungal susceptibility, as well as the interaction between those material characteristics. In a first test set-up, the ‘paste test’, the material’s structure is removed and fungal growth is assessed over time in 2D, with only the material’s chemical components playing a role. In the second test set-up, the ‘X-ray CT test’, fungal development is assessed non-destructively in 3D with X-ray CT, giving an indication of moisture production and distribution over time, in relation to the material’s structure. By comparing the results, we have a better idea of how much each material characteristic influences fungal susceptibility. This knowledge can then be used for optimising fungal testing of bio-based materials, ensuring optimal application and providing the building industry with the confidence they need to pave the way to a more sustainable future.},
  author       = {De Ligne, Liselotte and Van den Bulcke, Jan and Baetens, Jan and De Baets, Bernard and Van Acker, Joris},
  booktitle    = {XV International Conference on Durability of Building Materials and Components, (DBMC 2020), Proceedings},
  editor       = {Serrat, C. and Casas, J. R. and Gibert, V.},
  isbn         = {9788412110180},
  keywords     = {Bio-Based Building Materials,Material Characteristics,Fungal Degradation,X-Ray CT},
  language     = {eng},
  location     = {Barcelona, Spain},
  pages        = {239--246},
  publisher    = {International Center for Numerical Methods in Engineering (CIMNE)},
  title        = {Bio-based building materials : how to unravel the role of material characteristics on fungal susceptibility?},
  url          = {http://dx.doi.org/10.23967/dbmc.2020.195},
  year         = {2020},
}

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