Synthetic Reinforcement Fibre Barchip F
It is now widely accepted that the addition of fine monofilament polypropylene fibres to concrete will significantly reduce explosive spalling during fires.
What is Spalling?
Heating of a concrete element causes any retained moisture in the structure to rapidly expand and explode a small layer of concrete from the surface.
This will continue during a fire until substantial damage through loss of section occurs in the structure.
Spalling can occur as early as 10 to 15 minutes into a fire when surface temperatures reach as little as 200 degree Celsius.
How do the fibres work?
Once the temperature reaches 160 degrees Celsius, the fibres melt. This creates a multitude of tiny pathways through which the retained moisture can escape in a non-violent manner, thus reversing the increase in pressure within the concrete mass.
The addition of 1 kg/m3 of Barchip F is an extremely cost effective method of fire protection for concrete structures.
- Plastic shrinkage
- Passive Fire Protection
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