Concrete lintels reinforced with steel fibres oriented by a magnetic field
DOI:
https://doi.org/10.14311/AP.2022.62.0531Keywords:
magnetic, orientation, fibre, align, concrete, lintels, beamsAbstract
This paper explores the possibility of applying the technique of magnetic orientation of steel fibres for manufacturing a concrete structural element of realistic dimensions, compared to small laboratory specimens. This technique could be a part of an answer to the current need for faster and automated production in the prefabrication industry. The examined specimens have dimensions of commonly used lintels in construction, 80 mm × 100 mm × 980 mm. The properties of specimens with magnetically oriented fibres are compared with same size specimens prefabricated conventionally. The orientation of fibres has been confirmed by Q-factor non-destructive testing method using a measuring coil. All specimens were tested with a four-point bending test. The specimens with oriented fibres show a significantly higher flexural strength, by 150 %, than specimens produced conventionally with the same volume of fibres.
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Copyright (c) 2022 Kristýna Carrera, Karel Künzel, Petr Konrád, Radoslav Sovják, Václav Papež, Michal Mára, Jindřich Fornůsek, Přemysl Kheml
This work is licensed under a Creative Commons Attribution 4.0 International License.
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Accepted 2022-09-15
Published 2022-10-31