Magnetic properties of steel fibres commonly used in concrete

Künzel, Karel; Papež, Václav; Carrera, Kristýna; Sovják, Radoslav

doi:10.1016/j.matpr.2022.04.134

Cited by 3 publications

(1 citation statement)

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“…The parameter most sensitive to the quantity and orientation of the inserted fibres is the quality factor Q of the measuring coil, which is a dimensionless value calculated using the coil's resistance, inductance, and frequency of the passing electrical current. The quality factor Q and its use for this purpose is described more extensively in previous works [10,13,14]. The measurement setup consists of an impedance meter HIOKI IM3536 and a coil with 15 turns of a copper wire with a cross-section of 16 mm 2 .…”

Section: Testingmentioning

confidence: 99%

Concrete lintels reinforced with steel fibres oriented by a magnetic field

et al. 2022

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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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Section: Testingmentioning

confidence: 99%