Greenfiber-ForceX | Fibers

Repra Green Fiber is the environmentally friendly choice for fibers in concrete reinforcement. This natural fiber has an Environmental Product Declaration (EPD), which transparently demonstrates its environmental performance. Furthermore, Repra Green Fiber is included in the official environmental database, meaning it meets the strictest requirements for sustainability and circularity. This fiber is most comparable to GF(AR)-ForceX fiber. Repra Green Fiber is most effective during the plastic phase of concrete and prevents cracking in the initial phase. It also better manages water management, allowing the fiber to function internally and significantly prevent dehydration. Furthermore, the fiber improves the surface finish, resulting in less wear. Independent research by EMPA (the Swiss Federal Institute for Materials Research and Technology) shows that Repra Green Fiber performs better at a lower dosage (600 grams) than standard polypropylene fibers at a dosage of 900 grams. This means less material use, lower costs, and a smaller ecological footprint. The Repra Green Fiber is available in soluble sachets.

Applications of Repra Green Fiber
The Repra Green Fiber is suitable for a wide range of applications, such as:

• Industrial floors: Improved wear resistance and reduced cracking.
• Foundations and concrete slabs: Reduction of shrinkage and temperature cracks.
• Roads and cycle paths: Sustainable reinforcement with a lower MKI.
• Precast concrete products: Optimal strength and an environmentally friendly choice.

How is Repra Green Fiber applied?
The fibers are simply added to the concrete mix during production at the concrete plant. Thanks to its excellent workability and even distribution in the mix, Repra Green Fiber provides optimal reinforcement without any additional steps. With a dosage of only 600 grams per m³ of concrete mortar This fiber offers an efficient solution.
For comparison:

• Standard polypropylene fibers require a dosage of 900 grams per m³ .

Advantages:

1. Cost savings: Due to the low dosage of 600 grams per m³ you use less material, which immediately saves costs.
2. Better performance: Independent research by EMPA shows that Repra Green Fiber delivers even better results at lower dosages than standard fibers. This means higher quality and a reduced risk of cracking.
3. Sustainability and lower environmental impact (MKI): By being included in the environmental database, you can easily demonstrate your lower environmental impact (MKI) in tenders and sustainability reports. This helps you meet the strictest environmental requirements.
4. Easy processing: The fibers blend effortlessly into the concrete mix without any additional steps or special equipment, making the process more efficient.
5. Widely applicable: Whether for floors, roads, or prefabricated applications, Repra Green Fiber offers a universal solution for high-quality and durable concrete reinforcement.

The compressive strength of concrete with Repra Green Fiber is greater than that of concrete without additives when subjected to thermal aggressions up to a maximum temperature of 400 ° C.

The mechanism is the PITS (Pressure Induced Tangential Space) theory in which the steam counteracts the expansion of the Repra Green Fiber as it melts, to squeeze between the fiber and the concrete matrix and pass along the length of the fiber.