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The main advantage of SFRC and the most useful one regarding design of slabs on ground is the post-crack behaviour or toughness of SFRC.? Steel Fibres start acting when the first crack appears and have the ability to absorb and redistribute the loads so that the SFRC will still be able to bear loads even after the formation of cracks.? In fact SFRC has a ductile behaviour or toughness and therefore, that surplus of flexural capacity from the plastic phase (post-crack ductility) can be used for design of structure when deformation must be controlled like slabs or for structures where deformations controlled the design like underground linings.? It is the reason why, for the same thickness, a SFRC slab on ground can support higher loads than a conventional concrete slab.