Effect of recipe factors on mechanical properties of heavyweight steel fibre reinforced concrete

Today, steel fibre is one of the most promising components used to produce fibre reinforced concrete. To improve the mechanical properties of heavyweight steel fibre reinforced concrete, the influence 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 dimensions 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 experimental 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 reinforcement of 1.5% is the most effective.

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