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Inductive method for assessing the amount and orientation of steel fibers in concrete

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Abstract

Steel fibers are ferromagnetic and they have the property of altering the magnetic field around them. This paper discusses a method and gives a practical example to measure, non-destructively, the amount and orientation of fibers from cubic concrete specimens (150 mm). This is possible because the fibers affect inductance of a sensor (an inductive coil) that is wrapped around the specimen.

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Acknowledgments

The authors wish to thank the companies FCC, S.A. (HATCONS Project), PROMSA, ESCOFET and CEMEX for their partial financing and their participation in the experimental campaigns carried out. The authors also wish to thank the Ministry of Science and Innovation (MCINN) on the grounds of the CONSFIB project (reference: BIA 1010-17478). The second and the third authors wish to express their acknowledgement to the Comissionat per a Universitats del DIUE de la Generalitat de Catalunya i del Fons Social Europeu for the FI grant and to the Polytechnic University of Catalonia for the FPI-UPC grant, respectively. The same authors are also grateful for the support provided by the Col·legi d’Enginyers de Camins, Canals i Ports de Catalunya.

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Authors and Affiliations

  1. Construction and Electronic Engineering Departments, Technical University of Catalonia, Campus Nord, C1 and C4 Buildings, Jordi Girona, 1, 08034, Barcelona, Spain

    Josep M. Torrents, Ana Blanco, Pablo Pujadas, Antonio Aguado, Pablo Juan-García & Miguel Ángel Sánchez-Moragues

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  1. Josep M. Torrents
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  2. Ana Blanco
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  3. Pablo Pujadas
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  4. Antonio Aguado
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  5. Pablo Juan-García
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  6. Miguel Ángel Sánchez-Moragues
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Correspondence to Josep M. Torrents.

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Torrents, J.M., Blanco, A., Pujadas, P. et al. Inductive method for assessing the amount and orientation of steel fibers in concrete. Mater Struct 45, 1577–1592 (2012). https://doi.org/10.1617/s11527-012-9858-6

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