r glued HT: Extreme Strength for Structural Concrete Reinforcement

r glued HT is the technological evolution of our renowned glued fiber. While anchorage and dispersion are fundamental, the true potential of reinforcement lies in the steel’s ability to withstand tension without failing. That is why we have developed the HT (High Tensile) range using a superior steel with a tensile strength of over 2,100 MPa.

This superior characteristic translates into exceptional post-cracking behavior. When the concrete cracks, r glued HT fibers do not break; they deform plastically, absorbing an immense amount of energy, which provides unparalleled ductility and structural safety.

Its glued format ensures a perfect and rapid three-dimensional distribution, guaranteeing homogeneous performance throughout the structural element and making it the most efficient alternative to traditional wire mesh.

Key Benefits

Maximum Structural Performance: Thanks to its tensile strength of over 2,100 MPa, it absorbs more energy and provides exceptional ductility to the concrete.
Project Optimization: Allows for a reduction in fiber dosage () compared to standard fibers for the same performance level, generating savings and improving sustainability.
Perfect Dispersion: Its glued format guarantees a quick and homogeneous distribution in the concrete mix, eliminating the risk of fiber balling.
Safety and Reliability: Prevents brittle failure of the fiber and avoids long-term creep deformations, ensuring predictable and safe structural behavior over time.

Main Applications

Industrial and logistics pavements and slabs with high dynamic and static loads.
Slender, high-performance precast elements (segments, beams, panels).
Shotcrete reinforcement in tunnels and slopes.
Foundation slabs, joints, and applications with seismic requirements.
Critical infrastructures and civil engineering works.

Frequently asked questions

What is r-glued HT fiber and what makes it different?

r-glued HT (High Tensile) represents the highest tier of steel macrofibers for concrete. It combines the glued format for perfect dispersion with an ultra-high tensile strength steel wire (exceeding 1,500 MPa / 218 ksi). This combination makes it the most structurally efficient fiber on the market.

What is the main advantage of an "HT" (High Tensile) fiber?

The key advantage is superior mechanical performance with the same amount of material. The high-strength steel allows each individual fiber to withstand a significantly greater load before breaking. In practice, this means that for the same dosage, r-glued HT provides remarkably higher residual strength values (fR1, fR3) than standard steel fibers.

When should I choose r-glued HT instead of the standard r-glued?

r-glued HT is the solution for the most demanding and optimized projects, especially when the goal is to:

Maximize thickness reduction: For designing slender slabs and pavements without sacrificing load-bearing capacity.
Withstand extreme loads: In port pavements, heavy machinery areas, or special foundations.
Maximize rebar replacement: When the objective is to replace the largest possible amount of steel mesh or rebar.
Achieve the most sustainable solution: Attain the required structural performance with the lowest possible steel dosage, minimizing the carbon footprint of the reinforcement.

Is the performance improvement truly significant?

Yes. Comparative tests under the EN 14651 standard show that, at identical dosages, HT fibers can increase the post-crack residual strengths of concrete by over 25-30% compared to fibers made with standard-strength steel. This allows engineers to safely optimize their designs.

Does this mean I can use fewer kilos/pounds of HT fiber to get the same result?

Exactly. That is the principle of efficiency. If a project requires a specific residual strength value, it can be achieved with a lower dosage of r-glued HT compared to a standard fiber. This not only optimizes the cost of the reinforcement but also improves the workability of the concrete.

Does it retain the advantages of the glued format?

Absolutely. Despite its higher strength, it maintains all the benefits of the r-glued system:

Perfect and rapid dispersion.
Complete elimination of the risk of "hedgehogs" (clumping), even at high dosages.
Easy and fast addition at the concrete plant or on-site.

What are its most prominent applications?

Its use is justified in the most critical structural applications:

Jointless industrial floors with the highest load and flatness requirements.
Special precast elements such as segments for high-speed tunnels, bridge sections, or wind turbine foundations.
Pile-supported slab solutions where optimizing thickness and reinforcement is key.
Reinforcement of bases and foundations for heavy machinery with high dynamic loads.

Is the structural design different for HT fibers?

The design methodology is the same as for any structural fiber, based on the characteristic residual strengths (fRk) obtained from the EN 14651 test. The difference lies in the fact that the input values for r-glued HT are substantially higher, allowing for more efficient design outcomes.

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