Concrete lintels reinforced with steel fibres oriented by a magnetic field

IF 0.5 Q3 ENGINEERING, MULTIDISCIPLINARY

Acta Polytechnica Pub Date : 2022-10-31 DOI:10.14311/ap.2022.62.0531

Kristýna Carrera, Karel Künzel, Petr Konrád, R. Sovják, V. Papež, M. Mára, J. Fornůsek, Přemysl Kheml

引用次数: 0

Abstract

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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用磁场定向的钢纤维加固的混凝土门楣

与小型实验室样品相比，本文探讨了应用钢纤维磁定向技术制造真实尺寸混凝土结构元件的可能性。这项技术可能是解决预制行业目前对更快、自动化生产需求的一部分。所检测的试样的尺寸为建筑中常用的过梁的80 mm×100 mm×980 mm。将磁性定向纤维试样的性能与传统预制的相同尺寸试样进行了比较。纤维的取向已通过使用测量线圈的Q因子无损检测方法得到确认。所有试样均采用四点弯曲试验进行测试。具有定向纤维的试样显示出明显更高的弯曲强度，比具有相同体积纤维的常规生产的试样高150%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Polytechnica ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.90

自引率

12.50%

发文量

审稿时长

24 weeks

期刊介绍： Acta Polytechnica is a scientific journal published by CTU in Prague. The main title, Acta Polytechnica, is accompanied by the subtitle Journal of Advanced Engineering, which defines the scope of the journal more precisely - Acta Polytechnica covers a wide spectrum of engineering topics, physics and mathematics. Our aim is to be a high-quality multi-disciplinary journal publishing the results of basic research and also applied research. We place emphasis on the quality of all published papers. The journal should also serve as a bridge between basic research in natural sciences and applied research in all technical disciplines. The innovative research results published by young researchers or by postdoctoral fellows, and also the high-quality papers by researchers from the international scientific community, reflect the good position of CTU in the World University Rankings. We hope that you will ﬁnd our journal interesting, and that it will serve as a valuable source of scientiﬁc information.