Abstract
Today, steel fibre is one of the most promising components used to produce fibre reinforced con-crete. To improve the mechanical properties of heavyweight steel fibre reinforced concrete, the influ-ence of recipe factors, namely the percentage of fibre reinforcement and the fibre length, on these properties was studied. 18 series of reference samples of a standard size were manufactured and tested: 27 cubes with dimensions of 100x100x100 mm for compression tests and 27 prisms with di-mensions of 100x100x400 mm for bending under tension test. We calculated mechanical strength characteristics depending on the recipe factor. The calculations were performed using a numerical ex-perimental design (full factorial experiment 2k). Based on the obtained results, it can be concluded that the utilisation of steel fibre with a fibre length of 30 mm or the percentage of three-dimensional rein-forcement of 1.5% is the most effective.
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