Dear readers, welcome to another post with a bit more details about concrete reinforced with steel fibers.
Regarding the type of reinforcement used, concrete reinforced with steel fibers has become a fundamental material in the construction of industrial floors, pavements, bridge decks, elements for the stabilization of slopes, tunnel linings, precast structural elements, vaults and refractories, among others.
When steel fibers are used as concrete reinforcement, it is not necessary to pay for waste or to take into account the cutting, lashing and use of spacers, since they are exclusive procedures of conventional reinforcement by means of bars or electrowelded mesh. As for transport, it is much simpler and cheaper in the case of fibers, since it is not necessary to use special tools for handling them on site.
The hooked steel fibers avoid the fragile collapse of the and provide a remarkable resistance to the element.
The transformation of steel fibers into ultra high performance concrete (UHPC) has been one of the most popular lines of research due to the improvement it brings to the material.
From a technical point of view, it adds to the mentioned advantages: control of cracking, which implies less deterioration of the concrete due to environmental effects and penetration into the matrix of aggressive agents; they help to prevent the detachment of concrete fractions in floors and pavements; and give concrete greater impact resistance.
All these advantages make an excellent alternative to traditional pavements, achieving the use of smaller thicknesses and an expansion in the separation between joints under the same load conditions.
The steel fibers sew the cracks in the concrete, forming a “bridge” between the coarse aggregates, allowing a controlled formation of the cracks, and leading to the ductile behavior after the initial cracking, thus avoiding brittle fracture.
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