Glued steel fibres are short steel elements joined temporarily into bundles for easier handling and feeding into concrete. During mixing, the bonding material is designed to release the individual fibres, which then distribute through the mix and help control cracking and improve post-crack performance. They are used in applications such as industrial floors, precast products, and selected sprayed-concrete or infrastructure projects. The right fibre depends on the concrete design, placement method, performance requirements, and applicable project specifications—not on fibre dimensions alone.
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This guide explains how to compare fibre types, match specifications to applications, and prepare a useful supplier inquiry. At BEKA, we recommend that buyers share their intended use and technical requirements before requesting a quotation, so fibre configuration and supply details can be reviewed against the project.
This guide is intended for concrete producers, contractors, precast manufacturers, engineers, and purchasing teams evaluating glued steel fibres. It is useful when preparing a specification, comparing supplier offers, or confirming whether a fibre format fits a particular mixing and placement process. It is not a substitute for structural design or project-specific testing.
A glued steel fibre product consists of separate fibres held together in temporary bundles by a bonding material. Bundling can support more orderly handling and feeding compared with loose fibres, although the practical benefit depends on the mixer, batch size, and operating procedure. During mixing, the bundles are intended to separate so the fibres can distribute through the concrete.
Steel fibres contribute to concrete’s behaviour after cracking by bridging cracks and carrying load across them. The extent of this contribution depends on factors including fibre geometry, fibre content, concrete composition, placement, and the design criteria. Glued steel fibres should therefore be treated as one component of a designed concrete system, not as a stand-alone guarantee of a particular structural result.
Steel fibres are offered in different lengths, diameters, shapes, and end configurations. Straight fibres and fibres with deformed or hooked ends may interact differently with the concrete matrix, so selection should follow the performance requirements and the design method used for the project. Buyers should also confirm whether a quoted product is supplied as glued bundles or as loose fibres.
As an initial comparison—not a universal design recommendation—buyers may encounter fibre lengths around 30–60 mm and diameters around 0.5–1.0 mm. These figures are illustrative product dimensions; project requirements and available product configurations may differ. Ask suppliers to state the actual nominal dimensions and permitted tolerances for the offered product.
| Specification item | What to request or verify | Why it matters |
|---|---|---|
| Material and surface | Steel type, surface condition, and any specified coating | Confirms the product matches project and environmental requirements |
| Dimensions | Length, diameter, shape, and dimensional tolerances | Influences mix handling and fibre interaction with the concrete |
| Mechanical properties | Required tensile or other specified properties, with the relevant test method | Enables comparison against the project specification |
| Bundle format | Bundle configuration and bonding material information | Helps assess feeding, mixing, and compatibility with production procedures |
| Supply format | Packaging, net weight, labelling, and batch identification | Supports receiving, storage, traceability, and dosing control |
For floors and slabs, define the required design performance, slab details, joint strategy, subbase conditions, and construction method before selecting a fibre. Steel fibres may be specified as part of a designed floor system, but their use does not automatically eliminate conventional reinforcement or joints. Confirm the complete design with the responsible engineer.
Precast producers may assess glued fibres where consistent batching and fibre introduction are important to their process. The product must suit the element geometry, concrete mix, mould filling, and surface finish requirements. Trial production can help identify mixing or appearance issues before routine manufacture.
In sprayed concrete, infrastructure, or other specialist work, the selection should account for the placing equipment, rebound or handling considerations, exposure conditions, and specified residual performance. Project standards and local requirements can differ, so buyers should not assume that a fibre approved for one application is automatically appropriate for another. Request documentation relevant to the intended use.
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Start with the project specification and the performance the designer expects from fibre reinforcement. Identify whether the objective concerns crack control, post-crack behaviour, production efficiency, or another defined requirement. Ask the engineer to clarify acceptance criteria and any required test method before comparing quotations.
Share the concrete mix information that the supplier and project team consider relevant, along with mixer type, batch size, addition sequence, and placement method. These factors affect how fibres are introduced and dispersed. If a trial dosage is being considered, treat it as a project-specific starting point rather than a general recommendation.
For context, some projects may investigate trial dosages in the range of 20–40 kg/m3, but the appropriate amount can fall outside this range and must be established from design requirements and testing. This figure is not a BEKA design recommendation or a guaranteed performance level. Do not adopt a dosage without approval from the responsible project professional.
Compare supplier quotations against the same specification, including dimensions, material requirements, bundle format, packaging, and documentation. Clarify whether the price is based on a particular order quantity and delivery term. Ask how production scheduling, sample availability, and shipment timing will be confirmed for your destination.
Steel fibre pricing can depend on the specified material and geometry, order volume, packaging, manufacturing schedule, and delivery arrangements. Minimum order quantity and lead time are supplier- and order-specific, so they should be confirmed in writing rather than assumed from a catalogue or earlier purchase. For accurate comparison, request pricing for a stated quantity and delivery location.
When requesting a quotation from BEKA, include the required fibre specification or drawing, estimated order quantity, packaging preference, destination, and target delivery date. If the specification is still under development, provide the application and the information already available. We can review the inquiry and clarify which product and supply details need confirmation before an order is placed.
One frequent mistake is choosing fibres by length or price alone. A low unit price does not establish that a product meets the design requirement, and identical nominal lengths do not mean two fibres perform the same way. Compare the complete specification and confirm the required performance with the design team.
Another mistake is assuming glued bundles will disperse correctly under every mixing condition. Confirm the addition sequence and mixing procedure with the concrete producer and supplier, then evaluate the result in a suitable trial when the project requires it. Also avoid treating an indicative dosage as a final design value.
Glued steel fibres can be a practical format for introducing steel reinforcement into concrete, particularly when bundled handling fits the production process. The correct choice depends on the application, design performance, fibre geometry, concrete mix, installation method, and supply requirements. No single dimension or dosage is suitable for every project.
To move forward, prepare the project specification, confirm design criteria with the responsible engineer, and request a quotation against a defined quantity and delivery location. Share any drawings, required test methods, packaging needs, and schedule constraints with BEKA so we can review the inquiry and discuss the appropriate product and supply details.
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