Applications
Tunnels
Potential Problems
Following several recent tunnel fires in Europe, design engineers have had their minds firmly focused on how to prevent the explosive spalling of concrete in tunnels.
The phonomenon occurs when concrete is exposed to high temperatures such as those experienced during a hydrocarbon fire.
Potential Problems Continued
The high quality dense concrete that is associated with tunnelling projects means that in the event of a fire, moisture escaping from the heat source, cannot escape quickly enough. Any voids that are present within the concrete soon becomes saturated.
Often tunnel cast in-situ can suffer from plastic shrinkage cracking, which on occasions penetrates through the full thickness of the concrete. This plastic cracking will reduce the permeability of the tunnel lining.
Features and Benefits
- Reduced Explosive Spalling
- Reduced Construction Time
- Reduced Labour Costs
- Reduced Permeability
- Fibres Will Not Rust or Corrode
- Improved Resistance to Plastic Shrinkage Cracks
- Provides a 3-Dimensional Secondary Reinforcement System