r glued

Family: Metal fibers for general purpose

Application: Structural concrete with fibres

It is the classic metallic fibre on the market but with a glued presentation that improves its dispersion in high dosages. Its shaped end minimises the opening of cracks. The high tensile strength of the steel prevents creep deformation. It is available in various diameters to cover a wide range of mechanical performance and applications.

Advantages

	Diameter	Length	Slenderness	Downloads
r glued 35/0,55	0,55 mm	35 mm	64	DdP
r glued 60/0,75	0,75 mm	60 mm	80	DdP
r glued 60/0,75 HT	0,75 mm	60 mm	80	DdP

High structural reinforcement.
Reduction of the time required for meshing.
High energy absorption (>800 J).
Apto para bombeo (dependiendo de su longitud).
No creep.

Frequently asked questions

What is r-glued fiber?

r-glued is a high-performance steel macrofiber with hooked ends, presented in "combs" or bundles of fibers held together by a water-soluble adhesive. It is designed to ensure the fastest and most homogeneous dispersion possible within the concrete mix.

What is the function of the adhesive and how does it work?

The water-soluble adhesive keeps the fibers aligned and bundled during their addition to the concrete. Upon contact with the mix water, the adhesive dissolves within seconds, releasing the fibers individually and allowing for a perfect, tangle-free, three-dimensional distribution throughout the entire volume.

What key advantage does the "glued" format offer over loose fibers (like r-hook)?

The fundamental advantage is the guarantee of perfect dispersion and the complete elimination of the risk of "hedgehogs" (fiber clumping). This is especially critical for:

High dosages (>30 kg/m³ or 50 lb/yd³): Where loose fibers might struggle to separate properly.
Demanding mixing conditions: On-site mixers, small-batch mixers, or short mixing cycles.
High-specification projects: Where it is essential to ensure that the performance calculated in the lab is faithfully replicated on-site.

When should I choose r-glued instead of r-hook?

You should opt for r-glued when the quality and reliability of the mix are the top priority. It is the ideal solution for high-performance concrete, complex precast elements, or any application where a potential dispersion failure is not an option. It also allows for a faster addition of the material to the mix, optimizing productivity at the plant or on-site.

Does the adhesive negatively affect the concrete?

Not at all. The adhesive is chemically designed to be inert and to dissolve completely without leaving any residue. It does not interfere with cement chemistry, setting times, or the final properties of the concrete.

What are its main applications?

Like r-hook, it is ideal for structural applications, but it particularly excels in:

Industrial pavements with heavy loads that require high fiber dosages.
Precast concrete elements with complex geometric shapes.
Tunnel segments and other critical elements where reinforcement homogeneity is vital.
Shotcrete that is mixed on-site and requires very rapid dispersion.

Is the structural performance of an r-glued fiber different from an r-hook fiber?

An individual r-glued fiber has the same mechanical performance (anchorage and strength) as its r-hook equivalent. The difference is that the glued format ensures that 100% of the fibers work efficiently, guaranteeing that the residual strengths (fR1, fR3) achieved in practice match those of the theoretical calculation.

Does it require a special mixing time?

No, quite the opposite. The r-glued fiber is designed for standard mixing. Its format facilitates very rapid disintegration and dispersion, ensuring a homogeneous mix within the usual recommended times for fiber-reinforced concrete (approx. 1 min/m³ after the last component is added).