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01.10.2020

Hydrophobic mortar

Physical Sciences, Material

  • Hydrophobicity based on bacterial biofilm supplements
  • No need for post-treatment
  • Environmentally friendly

Ihr Kontakt

Dr. Katrin Bercht

E-Mail:
kbercht@baypat.de
Telefon:
+49 (0) 89 5480177 - 16
Referenznummer:
B75015

Herausforderung

The durability of cement-based materials such as mortar and concrete typically suffers from water penetration, resulting in corrosion of steel structures embedded inside the material, and therefore to damage and weakness of the building structure.

Innovation

Here a mortar hybrid material is presented where a bacterial biofilm is supplemented, increasing the hydrophobic properties. Bacterial biofilms are ubiquitous communities of bacteria encased in a matrix of self-produced biopolymers. In such a biofilm matrix, the bacteria are able to resist various environmental challenges, e.g., chemicals, desiccation, or removal from surfaces. With this addition of biofilm to mortar, the material exhibits an increased roughness on the microscale and the nanoscale, and on both the outer and inner surface, imitating the lotus effect (see Figure below).

Kommerzielle Möglichkeiten

Biofilm-enriched hybrid mortar

  • with strong hydrophobic properties
  • with no need for post-treatment
  • that is not harmful to the environment

Entwicklungsstatus

  • biofim-enriched hybrid mortar has been tested and analyzed on laboratory scale
  • lyophilized powder of the bacterial biofilm available as dry admixture
  • mechanical properties with different amounts of biofilm contents have been measured

References

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