A Bacteria-Based Self-Healing Cementitious Composite for Application in Low-Temperature Marine Environments
| Autor: | D. Palin, Virginie Wiktor, Henk M. Jonkers |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Composite number 0211 other engineering and technologies Biomedical Engineering chemistry.chemical_element Artificial seawater Bioengineering 02 engineering and technology Biochemistry lcsh:Technology Article Biomaterials bacteria-actuated self-healing concrete 021105 building & construction medicine organic–inorganic composite Composite material biology Magnesium lcsh:T marine low-temperature 021001 nanoscience & nanotechnology biology.organism_classification Permeability (earth sciences) chemistry Self-healing Molecular Medicine Mortar Swelling medicine.symptom 0210 nano-technology Bacteria Biotechnology |
| Zdroj: | Biomimetics, Vol 2, Iss 3, p 13 (2017) Biomimetics; Volume 2; Issue 3; Pages: 13 Biomimetics |
| ISSN: | 2313-7673 |
| Popis: | The current paper presents a bacteria-based self-healing cementitious composite for application in low-temperature marine environments. The composite was tested for its crack-healing capacity through crack water permeability measurements, and strength development through compression testing. The composite displayed an excellent crack-healing capacity, reducing the permeability of cracks 0.4 mm wide by 95%, and cracks 0.6 mm wide by 93% following 56 days of submersion in artificial seawater at 8 °C. Healing of the cracks was attributed to autogenous precipitation, autonomous bead swelling, magnesium-based mineral precipitation, and bacteria-induced calcium-based mineral precipitation in and on the surface of the bacteria-based beads. Mortar specimens incorporated with beads did, however, exhibit lower compressive strengths than plain mortar specimens. This study is the first to present a bacteria-based self-healing cementitious composite for application in low-temperature marine environments, while the formation of a bacteria-actuated organic–inorganic composite healing material represents an exciting avenue for self-healing concrete research. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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