Carbon Nanofiber Cement Sensors to Detect Strain and Damage of Concrete Specimens Under Compression

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Title: Carbon Nanofiber Cement Sensors to Detect Strain and Damage of Concrete Specimens Under Compression
Authors: Galao Malo, Oscar | Baeza, F. Javier | Zornoza, Emilio | Garcés, Pedro
Research Group/s: Durabilidad de Materiales y Construcciones en Ingeniería y Arquitectura | Grupo de Ensayo, Simulación y Modelización de Estructuras (GRESMES)
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería Civil
Keywords: Carbon nanofibers (CNFs) | Strain sensing | Damage sensing | Cement composites
Knowledge Area: Ingeniería del Terreno | Mecánica de Medios Continuos y Teoría de Estructuras | Ingeniería de la Construcción
Issue Date: 24-Nov-2017
Publisher: MDPI
Citation: Galao O, Baeza FJ, Zornoza E, Garcés P. Carbon Nanofiber Cement Sensors to Detect Strain and Damage of Concrete Specimens Under Compression. Nanomaterials. 2017; 7(12):413. doi:10.3390/nano7120413
Abstract: 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.
Sponsor: The authors wish to thank the Spanish Ministry of Science and Innovation for their economic support on this research (grant Mat 2009-10866) and Generalitat Valenciana (grant PROMETEO/2013/035).
URI: http://hdl.handle.net/10045/71531
ISSN: 2079-4991
DOI: 10.3390/nano7120413
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 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/).
Peer Review: si
Publisher version: http://dx.doi.org/10.3390/nano7120413
Appears in Collections:INV - DMCIA - Artículos de Revistas
INV - GRESMES - Artículos de Revistas

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