Steel-fibre-reinforced concrete (SFRC) is a form of reinforced concrete used for specific applications. It contains steel fibres that can be arranged three-dimensionally, creating a discontinuous and isotropic reinforcement once mixed into the concrete. Steel fibres can effectively seal off tiny cracks and help transfer stress, ultimately increasing the post-crack strength of concrete structures.

Steel fibres can be used in the composition of concrete, mortar, and grout. However, if these mixtures contain very few fines and/or an unsteady sieve curve at a higher fibre volume, problems such as mixing and dispersing can arise. In order to maximize the benefits of adding steel fibres to concrete, it is necessary to adjust the components of the mixture based on the type and amount of fibre used. Simply mixing steel fibres into any given concrete mix may not be enough.