Issue |
MATEC Web Conf.
Volume 378, 2023
SMARTINCS’23 Conference on Self-Healing, Multifunctional and Advanced Repair Technologies in Cementitious Systems
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Article Number | 05005 | |
Number of page(s) | 5 | |
Section | Self-Sensing, Monitoring and Inspection of Concrete Structures and Infrastructure | |
DOI | https://doi.org/10.1051/matecconf/202337805005 | |
Published online | 28 April 2023 |
Piezoresistivity in self-compacting concrete mixes with hybrid additions of carbon fibers and nanofibers
Universidad de Alcalá, Architectural School, c/ Santa Úrsula, 8, 28801, Spain
* Corresponding author: javier.puente@uah.es
Self-sensing properties of concrete structures can be achieved through the incorporation of additions in carbon-based materials (CBM) that modify electrical properties and provide piezoresistive (PZR) properties to the cement paste. PZR in pastes and mortar mixes with different types of carbon-based materials such as fibers of different sizes has been extensively tested. However, very limited studies on self-sensing properties in concrete are available due to the lower content of paste volume that leads to a decrease of concrete PZR. However, self-compacting concrete (SCC) can be an ideal candidate to implement PZR, due to two fundamental traits: the larger amount of paste of SCC compared to a conventional concrete and larger volumetric fraction of fiber can be incorporated due to a reduced effect on SCC workability and consistency. The present study aims to assess PZR properties of SCC with carbon-based components of different sizes. Combining carbon nanofibers (NFC) and carbon fibers (CF), in hybrid systems, could lead to obtain SCC with self-sensing properties identifying their effectiveness thresholds. The self-detection performance of PZR-SCC samples under mechanical stress was verified by resistivity and PZR experimental tests.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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