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Carbon Nanofiber Cement Sensors to Detect Strain and Damage of Concrete Specimens Under Compression
Cement composites with nano-additions have been vastly studied for their functional applications, such as strain and damage sensing. The capacity of a carbon nanofiber (CNF) cement paste has already been tested. However, this study is focused on the use of CNF cement composites as sensors in regular...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5746903/ https://www.ncbi.nlm.nih.gov/pubmed/29186797 http://dx.doi.org/10.3390/nano7120413 |
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author | Galao, Oscar Baeza, F. Javier Zornoza, Emilio Garcés, Pedro |
author_facet | Galao, Oscar Baeza, F. Javier Zornoza, Emilio Garcés, Pedro |
author_sort | Galao, Oscar |
collection | PubMed |
description | Cement composites with nano-additions have been vastly studied for their functional applications, such as strain and damage sensing. The capacity of a carbon nanofiber (CNF) cement paste has already been tested. However, this study is focused on the use of CNF cement composites as sensors in regular concrete samples. Different measuring techniques and humidity conditions of CNF samples were tested to optimize the strain and damage sensing of this material. In the strain sensing tests (for compressive stresses up to 10 MPa), the response depends on the maximum stress applied. The material was more sensitive at higher loads. Furthermore, the actual load time history did not influence the electrical response, and similar curves were obtained for different test configurations. On the other hand, damage sensing tests proved the capability of CNF cement composites to measure the strain level of concrete samples, even for loads close to the material’s strength. Some problems were detected in the strain transmission between sensor and concrete specimens, which will require specific calibration of each sensor one attached to the structure. |
format | Online Article Text |
id | pubmed-5746903 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-57469032018-01-03 Carbon Nanofiber Cement Sensors to Detect Strain and Damage of Concrete Specimens Under Compression Galao, Oscar Baeza, F. Javier Zornoza, Emilio Garcés, Pedro Nanomaterials (Basel) Article Cement composites with nano-additions have been vastly studied for their functional applications, such as strain and damage sensing. The capacity of a carbon nanofiber (CNF) cement paste has already been tested. However, this study is focused on the use of CNF cement composites as sensors in regular concrete samples. Different measuring techniques and humidity conditions of CNF samples were tested to optimize the strain and damage sensing of this material. In the strain sensing tests (for compressive stresses up to 10 MPa), the response depends on the maximum stress applied. The material was more sensitive at higher loads. Furthermore, the actual load time history did not influence the electrical response, and similar curves were obtained for different test configurations. On the other hand, damage sensing tests proved the capability of CNF cement composites to measure the strain level of concrete samples, even for loads close to the material’s strength. Some problems were detected in the strain transmission between sensor and concrete specimens, which will require specific calibration of each sensor one attached to the structure. MDPI 2017-11-24 /pmc/articles/PMC5746903/ /pubmed/29186797 http://dx.doi.org/10.3390/nano7120413 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 Galao, Oscar Baeza, F. Javier Zornoza, Emilio Garcés, Pedro Carbon Nanofiber Cement Sensors to Detect Strain and Damage of Concrete Specimens Under Compression |
title | Carbon Nanofiber Cement Sensors to Detect Strain and Damage of Concrete Specimens Under Compression |
title_full | Carbon Nanofiber Cement Sensors to Detect Strain and Damage of Concrete Specimens Under Compression |
title_fullStr | Carbon Nanofiber Cement Sensors to Detect Strain and Damage of Concrete Specimens Under Compression |
title_full_unstemmed | Carbon Nanofiber Cement Sensors to Detect Strain and Damage of Concrete Specimens Under Compression |
title_short | Carbon Nanofiber Cement Sensors to Detect Strain and Damage of Concrete Specimens Under Compression |
title_sort | carbon nanofiber cement sensors to detect strain and damage of concrete specimens under compression |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5746903/ https://www.ncbi.nlm.nih.gov/pubmed/29186797 http://dx.doi.org/10.3390/nano7120413 |
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