Product Data Sheet
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SikaFiber® CHO 65/35 NB

STEEL FIBERS FOR REINFORCEMENT OF CONCRETE

SikaFiber® CHO 65/35 NB are high quality steel fibers for the reinforcement of shotcrete. SikaFiber® CHO 65/35 NB are specially glued to facilitate their homogenization in concrete and avoiding the agglomeration of the individual fibers. SikaFiber® CHO 65/35 NB are steel fibers of high length / diameter ratio allowing a high performance with less fiber.

• Increases concrete strength for impact and cracking
• Increases ductility and energy absorption
• Reduction of retraction cracking
• Does not affect setting times
• Its gluing condition ensures a uniform distribution in the concrete mix
• The ratio, length / diameter equal to 65, gives maximum performance
• Shaped ends for maximum concrete anchorage
Product Data Sheet
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Usage

SikaFiber® CHO 65/35 NB,provides a high capacity of support to the concrete in a wide range of applications and especially for the shotcrete, reducing the times and costs associated with the traditional reinforcement with steel meshes.  

Advantages

• Increases concrete strength for impact and cracking
• Increases ductility and energy absorption
• Reduction of retraction cracking
• Does not affect setting times
• Its gluing condition ensures a uniform distribution in the concrete mix
• The ratio, length / diameter equal to 65, gives maximum performance
• Shaped ends for maximum concrete anchorage

Packaging

20 kg dissolvable bags

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

SikaFiber® CHO 65/35 NB complies with ASTM A820 "Steel Fibers for Reinforced Concrete" and DIN 17140-D9 for low carbon steel.
Product Information

Shelf Life

Not determined

Storage Conditions

SikaFiber® CHO 65/35 NB bags can be stored indefinitely protected from rain. Transport with normal precautions for chemicals.

Application

Application steps

APPLICATION INSTRUCTIONS

SikaFiber® CHO 65/35 NB, can be added on the weighing scale or on the belt or directly into the Ready-Mix truck, as follows in each case:

Wet Mix Plant

  • On the aggregate weighing scale. Open the bags and put the fibers directly onto the aggregates, do not place the bags unopened, because they can block the discharge gates. Mix normally. No additional mixing time is necessary in this case.
  • On the feed belt, if there is access. The steel fibers can be added during or after placing the aggregates. Mixing normally. No additional mixing time is necessary in this case.
  • SikaFiber® CHO 65/35 NB can also be added directly into the mixer, once all other ingredients has been discharged into the mixer.

Dry Mix Plant

  • Once all the ingredients have been discharged into the mixer truck, add in the fibers at a rate of 60 kg/min while the readymix truck is rotating at high speed (12–18 rpm). Mix an additional 5 minutes and visually check to ensure the mix is homogenous and the fibers are spread out evenly.
  • A minimum slump of 120 mm is required prior to adding SikaFiber® CHO 65/35 NB.
  • Do not discharge SikaFiber® CHO 65/35 NB into the mixer before the aggregates.
  • Dissolvable bags can be added directly to the mixer truck.

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