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Performance of Self-Healing Cementitious Composites Using Aligned Tubular Healing Fiber

From the perspective of improving the self-healing method in construction, a tubular healing fiber was adopted as a container to improve the encapsulation capacity, which was available using a micro-capsule as a container. Knowing the direction of the stresses to which structure members are subjecte...

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Autores principales: Mu, Ru, Soro, Dogniman Landry, Wang, Xiaowei, Qing, Longbang, Cao, Guorui, Mei, Shaolin, Liu, Yongshuai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8540065/
https://www.ncbi.nlm.nih.gov/pubmed/34683754
http://dx.doi.org/10.3390/ma14206162
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author Mu, Ru
Soro, Dogniman Landry
Wang, Xiaowei
Qing, Longbang
Cao, Guorui
Mei, Shaolin
Liu, Yongshuai
author_facet Mu, Ru
Soro, Dogniman Landry
Wang, Xiaowei
Qing, Longbang
Cao, Guorui
Mei, Shaolin
Liu, Yongshuai
author_sort Mu, Ru
collection PubMed
description From the perspective of improving the self-healing method in construction, a tubular healing fiber was adopted as a container to improve the encapsulation capacity, which was available using a micro-capsule as a container. Knowing the direction of the stresses to which structure members are subjected, this research investigated the influence of aligning tubular healing fibers parallel to intended stress into a cementitious composite to increase the self-healing capability. For that, a healing agent was encapsulated into a tubular healing fiber made with polyvinylidene of fluoride resin (PVDF). Then, the healing fiber was combined with steel fibers to align both fibers together parallel to the direction of an intended splitting tensile stress when subjected to a magnetic field in a cylindrical cementitious composite. The alignment method and the key point through which the alignment of the healing fibers could efficiently improve autonomic self-healing were investigated. Since the magnetic field is known to be able to drag steel to an expected direction, steel fibers were combined with the healing fibers to form a hybrid fiber that aligned both fibers together. The required mixture workability was investigated to avoid the sinking of the healing fibers into the mixture. The healing efficiency, according to the orientation of the healing fibers in the composite matrix, was evaluated through a permeability test and a repetitive splitting tensile test. The aligned healing fibers performed better than the randomly distributed healing fibers. However, according to the healing efficiency with aligned healing fibers, it was deduced that the observed decreasing effect of the container’s alignment on the specimen’s mechanical properties was low enough to be neglected.
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spelling pubmed-85400652021-10-24 Performance of Self-Healing Cementitious Composites Using Aligned Tubular Healing Fiber Mu, Ru Soro, Dogniman Landry Wang, Xiaowei Qing, Longbang Cao, Guorui Mei, Shaolin Liu, Yongshuai Materials (Basel) Article From the perspective of improving the self-healing method in construction, a tubular healing fiber was adopted as a container to improve the encapsulation capacity, which was available using a micro-capsule as a container. Knowing the direction of the stresses to which structure members are subjected, this research investigated the influence of aligning tubular healing fibers parallel to intended stress into a cementitious composite to increase the self-healing capability. For that, a healing agent was encapsulated into a tubular healing fiber made with polyvinylidene of fluoride resin (PVDF). Then, the healing fiber was combined with steel fibers to align both fibers together parallel to the direction of an intended splitting tensile stress when subjected to a magnetic field in a cylindrical cementitious composite. The alignment method and the key point through which the alignment of the healing fibers could efficiently improve autonomic self-healing were investigated. Since the magnetic field is known to be able to drag steel to an expected direction, steel fibers were combined with the healing fibers to form a hybrid fiber that aligned both fibers together. The required mixture workability was investigated to avoid the sinking of the healing fibers into the mixture. The healing efficiency, according to the orientation of the healing fibers in the composite matrix, was evaluated through a permeability test and a repetitive splitting tensile test. The aligned healing fibers performed better than the randomly distributed healing fibers. However, according to the healing efficiency with aligned healing fibers, it was deduced that the observed decreasing effect of the container’s alignment on the specimen’s mechanical properties was low enough to be neglected. MDPI 2021-10-18 /pmc/articles/PMC8540065/ /pubmed/34683754 http://dx.doi.org/10.3390/ma14206162 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mu, Ru
Soro, Dogniman Landry
Wang, Xiaowei
Qing, Longbang
Cao, Guorui
Mei, Shaolin
Liu, Yongshuai
Performance of Self-Healing Cementitious Composites Using Aligned Tubular Healing Fiber
title Performance of Self-Healing Cementitious Composites Using Aligned Tubular Healing Fiber
title_full Performance of Self-Healing Cementitious Composites Using Aligned Tubular Healing Fiber
title_fullStr Performance of Self-Healing Cementitious Composites Using Aligned Tubular Healing Fiber
title_full_unstemmed Performance of Self-Healing Cementitious Composites Using Aligned Tubular Healing Fiber
title_short Performance of Self-Healing Cementitious Composites Using Aligned Tubular Healing Fiber
title_sort performance of self-healing cementitious composites using aligned tubular healing fiber
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8540065/
https://www.ncbi.nlm.nih.gov/pubmed/34683754
http://dx.doi.org/10.3390/ma14206162
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