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A Bacteria-Based Self-Healing Cementitious Composite for Application in Low-Temperature Marine Environments

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 com...

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Detalles Bibliográficos
Autores principales: Palin, Damian, Wiktor, Virginie, Jonkers, Henk M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6352682/
https://www.ncbi.nlm.nih.gov/pubmed/31105176
http://dx.doi.org/10.3390/biomimetics2030013
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author Palin, Damian
Wiktor, Virginie
Jonkers, Henk M.
author_facet Palin, Damian
Wiktor, Virginie
Jonkers, Henk M.
author_sort Palin, Damian
collection PubMed
description 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.
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spelling pubmed-63526822019-05-16 A Bacteria-Based Self-Healing Cementitious Composite for Application in Low-Temperature Marine Environments Palin, Damian Wiktor, Virginie Jonkers, Henk M. Biomimetics (Basel) Article 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. MDPI 2017-07-14 /pmc/articles/PMC6352682/ /pubmed/31105176 http://dx.doi.org/10.3390/biomimetics2030013 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Palin, Damian
Wiktor, Virginie
Jonkers, Henk M.
A Bacteria-Based Self-Healing Cementitious Composite for Application in Low-Temperature Marine Environments
title A Bacteria-Based Self-Healing Cementitious Composite for Application in Low-Temperature Marine Environments
title_full A Bacteria-Based Self-Healing Cementitious Composite for Application in Low-Temperature Marine Environments
title_fullStr A Bacteria-Based Self-Healing Cementitious Composite for Application in Low-Temperature Marine Environments
title_full_unstemmed A Bacteria-Based Self-Healing Cementitious Composite for Application in Low-Temperature Marine Environments
title_short A Bacteria-Based Self-Healing Cementitious Composite for Application in Low-Temperature Marine Environments
title_sort bacteria-based self-healing cementitious composite for application in low-temperature marine environments
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6352682/
https://www.ncbi.nlm.nih.gov/pubmed/31105176
http://dx.doi.org/10.3390/biomimetics2030013
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