We have previously emphasized in the section on Tecwool® F the importance to protect tunnels. For this purpose, Tecwool® 825 has been tested in accordance to RWS Protocol/Efectis “Fire resistance of coatings to protect concrete” and subject to the RWS and HCM fi re curves, adapting to the more common normative requirements worldwide. During the 3 hours of testing, temperature on the concrete surface never exceeded 201 °C, well below the maximums established in the protocol:
380 °C on the surface and 250° in the steel reinforcements, resulting a Tecwool® 825 superb insulation performance.
Tecwool® 825 has also showed a great adhesion capacity to concrete and steel, a monolithic finish and, due to its content of mineral wool, avoids the appearance of cracks over the time.
Standard: Protocolo RWS /Efectis Fire testing procedure for concrete tunnel
Laboratory: Efectis Netherland
Test Nº: 2010-Efectis-R0531
1. Concrete walls or slabs.
2. Tecwool® 825 (thickness is depending on the fifi re resistance required and construction characteristics).
Tecwool® 825 is spread with a pneumatic machine pursuant to the following technical specifications:
The surface to be protected requires no prior primer, mesh or any other type of support for the mortar adherence.
The surface to be protected should be free from dust, oil, waste, poorly attached particles, paint leftover, etc.
It is recommended to use water with the application hose to wash dirt away from the faces. This will also help achieve a thermal balance between the mortar and the applied surface.
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