Fire protection for carbon fiber reinforcements
GEOSTAFF® offers, through Laboratory Assessment No. EFR-18-001644, validated solutions in GEOTEC® to protect carbon reinforcements installed under concrete slabs and beams according to the fire performance required and critical temperatures given by the manufacturer.
When existing load-bearing structures require reinforcements (in the case of a change of condition, earthquake containment, rehabilitation, etc.), one of the solutions consists of bonding carbon fibre reinforced laminates with an epoxy resin-based adhesive.
In the event of fire, the epoxy resin in the glue is not resistant and the carbon fibre reinforcements will come loose.
In order to ensure the fire stability of the carbon plates and by extension of the concrete structures, it is essential to guarantee the temperature of the glue used. This maximum temperature, which varies between 45 and 80°C, is indicated in the manufacturers’ technical notices, to which reference should be made.
System performances
Protection under concrete floor slab
| Desired interface temperature (C°) | 30 min | 60 min | 90 min | 120 min | 180 min | Desired interface temperature (C°) | 30 min | 60 min | 90 min | 120 min | 180 min |
|---|---|---|---|---|---|
| 45 | 2x30 mm (Overlap 100 mm) | 2x45 mm (Overlap 100 mm) | 2x45 mm (Overlap 350 mm) | 3x45 mm (Overlap 250 mm) | - |
| 60 | 2x30 mm (Overlap 100 mm) | 2x30 mm (Overlap 100 mm) | 2x45 mm (Overlap 100 mm) | 2x45 mm (Overlap 200 mm) | - |
| 80 | 2x30 mm (Overlap 100 mm) | 2x30 mm (Overlap 100 mm) | 2x30 mm (Overlap 100 mm) | 2x45 mm (Overlap 100 mm) | 2x45 mm (Overlap 100 mm) |
Protection under the beam : Reinforcement installed on the bottom of the beam
| Desired interface temperature (C°) | 30 min | 60 min | 90 min | 120 | Desired interface temperature (C°) | 30 min | 60 min | 90 min | 120 |
|---|---|---|---|---|
| 45 | 2x45 mm | 2x45 mm | 3x45 mm | - |
| 60 | 2x45 mm | 2x45 mm | 2x45 mm + 30 mm | 3x45 mm |
| 80 | 2x30 mm | 2x45 mm | 2x45 mm | 2x45 mm |
Protection under the beam : Reinforcement installed on the side of the beam
| Desired interface temperature (C°) | 30 min | 60 min | 90 min | 120 min | Desired interface temperature (C°) | 30 min | 60 min | 90 min | 120 min |
|---|---|---|---|---|
| 45 | 2x45 mm | 2x45 mm | 2x45 mm + 30 mm | 3x45 mm |
| 60 | 2x30 mm | 2x45 mm | 2x45 mm | 2x45 mm + 30 mm |
| 80 | 2x30 mm | 2x30 mm | 2x45 mm | 2x45 mm |
*Note: The indicated values are calculated according to the protection thickness of GEOTEC®S as well as the required fire performance.
Associated products
GEOTEC® S30 boards
1 hr. fire protective board 30 mm thick and with dimensions from 200 to 1100 (W) x 1000 (L) mm (in steps of 50 mm).
GEOTEC® S45 boards
2-hr. fire protective board 45 mm thick and with dimensions from 200 to 1100 (W) x 1000 (L) mm (in steps of 50 mm).
GEOTEC® SX30 boards
1 hr. fire protective board, thickness 30 mm and unique dimension 1200 (W) x 1000 (L) mm.
GEOTEC® SX45 boards
2-hr. fire protective board 45 mm thick and unique dimension 1200 (W) x 1000 (L) mm for passive fire protection
GEOCOL® fireproof glue
Powder-coated glue, available in 25 kg bags, especially formulated for the assembly of GEOTEC® and GEOFLAM® boards.
