Steel fiber reinforced concrete
RIMSA's steel fibers for concrete are added to the mix during batching and provide the highest structural capacity in the whole range. They are the reference choice when the aim is to reduce or replace welded wire mesh and conventional reinforcement in industrial floors and large slabs, shotcrete for tunnels and slopes, segments and precast elements. We offer steel fibers for general use and thin high-performance steel fibers for UHPC.
Types of steel fibers for concrete we offer
Polymer fibers for concrete
Microfibers against plastic shrinkage cracking and macrofibers with residual strength, with lower weight and no risk of corrosion.
r grip · r twist · r gun
Glass fibers for concrete
Non-metallic reinforcement made of alkali-resistant glass, for when a clean surface finish is decisive.
r strand
Frequently asked questions about steel fiber reinforced concrete
Which applications are steel fibers for concrete recommended for?
They are the reference choice for industrial floors and large slabs, shotcrete for tunnel and slope support, segments and precast elements, and pile-supported slabs. In all these cases they provide enough residual flexural tensile strength to reduce or eliminate passive reinforcement, with the savings in time and labour that this brings.
Do steel fibers rust inside concrete?
Fibers embedded in the mix are protected by the alkalinity of the concrete and do not corrode as long as the cover remains intact. What can appear is surface rust on fibers exposed at the visible face: it is an aesthetic, localised effect that does not progress inwards or compromise the structural capacity of the element. In aggressive environments or with a demanding exposed finish, coated fibers or a polymer alternative should be considered.
What dosage of steel fibers is needed?
It depends on the residual strength required by the project, the thickness of the element and the support conditions.
What do the aspect ratio and anchorage type of a steel fiber mean?
The aspect ratio is the ratio between the length of the fiber and its diameter, and it determines how many fibers there are per kilogram and their ability to stitch cracks. The anchorage —shaped ends, corrugation or other geometries— determines the bond with the matrix and, therefore, the load the fiber can transfer before it slips. Both parameters, together with the tensile strength of the wire, define the real performance of the fiber for the same dosage in kilograms.