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Materials 2013, 6(3), 841-855; doi:10.3390/ma6030841
Article

Multifunctional Cement Composites Strain and Damage Sensors Applied on Reinforced Concrete (RC) Structural Elements

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Received: 7 January 2013; in revised form: 25 February 2013 / Accepted: 26 February 2013 / Published: 6 March 2013
(This article belongs to the Special Issue Advances in Multifunctional Materials)
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Abstract: In this research, strain-sensing and damage-sensing functional properties of cement composites have been studied on a conventional reinforced concrete (RC) beam. Carbon nanofiber (CNFCC) and fiber (CFCC) cement composites were used as sensors on a 4 m long RC beam. Different casting conditions (in situ or attached), service location (under tension or compression) and electrical contacts (embedded or superficial) were compared. Both CNFCC and CFCC were suitable as strain sensors in reversible (elastic) sensing condition testing. CNFCC showed higher sensitivities (gage factor up to 191.8), while CFCC only reached gage factors values of 178.9 (tension) or 49.5 (compression). Furthermore, damage-sensing tests were run, increasing the applied load progressively up to the RC beam failure. In these conditions, CNFCC sensors were also strain sensitive, but no damage sensing mechanism was detected for the strain levels achieved during the tests. Hence, these cement composites could act as strain sensors, even for severe damaged structures near to their collapse.
Keywords: strain sensing; cement composite; carbon nanofibers, CNF; carbon fiber; damage sensing strain sensing; cement composite; carbon nanofibers, CNF; carbon fiber; damage sensing
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Baeza, F.J.; Galao, O.; Zornoza, E.; Garcés, P. Multifunctional Cement Composites Strain and Damage Sensors Applied on Reinforced Concrete (RC) Structural Elements. Materials 2013, 6, 841-855.

AMA Style

Baeza FJ, Galao O, Zornoza E, Garcés P. Multifunctional Cement Composites Strain and Damage Sensors Applied on Reinforced Concrete (RC) Structural Elements. Materials. 2013; 6(3):841-855.

Chicago/Turabian Style

Baeza, Francisco J.; Galao, Oscar; Zornoza, Emilio; Garcés, Pedro. 2013. "Multifunctional Cement Composites Strain and Damage Sensors Applied on Reinforced Concrete (RC) Structural Elements." Materials 6, no. 3: 841-855.


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