Safe from Fire and Smoke

Fire protection boards made of glass fibre reinforced lightweight concrete for underground transportation facilities are available in thicknesses ranging from
10 to 60 mm and can be covered with weather-resistant concrete colour

Quelle/source (3): Fermacell Aestuver

Special solutions: At Berlin Main Station extensive technical installations were secured safely with fire protection cable ducts. This major scheme required a large number of special solutions

Quelle/source (3): Fermacell Aestuver

Quelle/source: Täby BrandskyddsTeknik

In Stockholm’s Söderleds Tunnel, tunnel fire protection boards were preferred to fire protection plaster on account of reduced processing times which in turn resulted in shortened closure times for traffic

Quelle/source: Täby BrandskyddsTeknik

Quelle/source: Fermacell Aestuver

Easy renewal of cable duct covers

Quelle/source: Fermacell Aestuver

In the event of fire the cable ducts in the Essen Metro can also be used as evacuation routes

Quelle/source: Fermacell Aestuver

Serious accidents involving fatalities and high economic impact have regularly resulted in protracted discussion of tunnel safety in the event of fire in recent years. The enhanced standards resulting from this technical debates are first and foremost geared to protecting the structural concrete from the consequences of a rapid increase in temperature and an enormous heat development, to the safe design of escapeways and furthermore to retaining functioning electrical equipment.

Three significant factors diminish the bearing capacity of the structure and hamper stability in the event of a tunnel fire:

Explosion-like spalling caused by immense heat development and the resultant chemical and physical processes triggered in the concrete. Modern high-strength concretes, whose pore content and permeability are reduced, react especially sensitively here.

Changes in the structure of the aggregate filler containing quartz caused by heat (the so-called quartz leap) result in changes in volume and thereby in concrete attrition.

Tiny cracks caused by the fire impact increasingly...