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Home » Applications » Protection of concrete structures » Fire protection of concrete structures

Fire protection of concrete structures

The fire protection of concrete structures is achieved by spray applying fibrous coatings: Fibrexpan® and Fibrofeu® and the slurry product: Fireplaster 270®. These coatings are all manufactured and marketed by Projiso.

Fire protection of concrete structures

Fire protection of concrete structures: Fibrexpan®

Fibrexpan® is a spray-on fibrous coating that can be used for fire protection of concrete structures. Fibrexpan® is a dry material composed of slag wool, hydraulic and semi-synthetic binders and various additives; It is supplied in flake format.

Fibrexpan® is a spray-on product. The spraying technique, also known as flocking, consists in applying Fibrexpan® fibres under pressure, using special machines.
The sprayed thickness will be defined according to the desired fire insulation rating.

The spraying machine comprises a feed hopper, a carding device, a blowing device (fan, turbine or blower), and a hose for conveying the mixture to be sprayed. Plus a spray gun used to apply the fibrous Fibrexpan® mixture, and water.

The product is carded in the machine, then fed to the spray gun by means of compressed air. Water-fed nozzles are placed around the hose outlet to wet the product before it is sprayed onto the substrate.

The thickness of the spray-on coating will vary according to the thickness of the reinforced concrete slab and of the steel coatings, depending on whether this involves:
• concrete slabs: Fibrexpan® thickness will vary between 44 and 215 mm for an REI performance of between 30 and 240 minutes.
• beams on single or continuous concrete supports with width greater than or equal to 150 mm: Fibrexpan® thickness will vary between 40 and 80 mm for an REI performance of between 30 and 240 minutes.
• concrete walls: Fibrexpan® thickness will vary between 44 and 80 mm for an REI performance of between 30 and 240 minutes.

Fire protection of concrete structures

Fire protection of concrete structures

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Fire protection of concrete structures: Fibrofeu®

First, a bonding agent must be applied
Projiso Fixo B® is used for concrete supports. Projiso Fixo B® is a solution of vinyl derivatives with a high molecular weight and a high degree of polymerisation.
Projiso Fixo B® is applied with a brush, roller or low-pressure sprayer on a clean, sound surface.

The coating will be finished with Projiso Fixo Dur® ou le Sidairless®.
Projiso Fixo Dur® acts by impregnation. Its novel formula combined with its particularly low viscosity allows it to penetrate the fibrous coating to a depth of up to 15 mm. It is applied by spraying.
Sidairless® is a coating specially designed for the surfacing and mechanical reinforcement of fibrous coatings. It is applied using pumps for spray-applied coatings.
Colouring in pastel shades can be done directly on site.

Protection incendie des structures béton : Fibrofeu®

Fibrofeu® is a fibrous spray-on mixture used for passive fire protection of concrete structures. Fibrofeu® consists of slag wool, with hydraulic and inorganic binders. It is supplied in the form of light flocons. It is used for the fire resistance of concrete structures.

Fibrofeu® is a spray-on product. The spraying technique, also known as flocking, consists in applying Fibrofeu® fibres under pressure using special machines.
The sprayed thickness will be defined according to the desired fire insulation rating.

The spraying machine comprises a feed hopper, a carding device, a blowing device (fan, turbine or blower), a hose for conveying the mixture to be sprayed. A spray gun and water.

The product is placed in the machine and then fed through a hose to a spray gun using compressed air. Water-fed nozzles are placed around the hose outlet to wet the product before it is sprayed onto the substrate.

The thickness of the spray-on coating will vary according to the thickness of the reinforced concrete slab and of the steel coatings, depending on whether this involves:
• concrete slabs: Fibrofeu® thickness will vary between 14 and 36 mm for an REI performance of between 30 and 240 minutes.
• beams on single or continuous concrete supports with width greater than or equal to 150 mm: Fibrofeu® thickness will vary between 17 and 48 mm for an R performance of between 30 and 240 minutes.
• concrete walls: Fibrofeu® thickness will vary between 14 and 33 mm for an REI performance of between 30 and 240 minutes.

Fire protection of concrete structures

Techniques for using Fibrofeu® for the fire protection of concrete structures

First, a bonding agent must be applied Projiso Fixo B® is a solution of vinyl derivatives with a high molecular weight and a high degree of polymerisation used on concrete supports.

The coating will be finished with Projiso Fixo Dur® ou le Sidairless®.
Projiso Fixo Dur® is a complex mixture of silicates and acrylic copolymers in the water phase.
Sidairless® is an aqueous dispersion of vinyl copolymers with inert mineral fillers.

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Fire protection of concrete structures: Fireplaster 270®

Fireplaster 270® is a sprayable powder mixture used for fire protection of concrete structures.
The material is based on plaster, vermiculite and special additives.
Fireplaster 270® is a spray-on coating used for fire resistance of concrete structures.
Fireplaster 270® is a spray-on product. This slurry mixture is a mortar that is supplied in powder format. Fireplaster 270® is sprayed on using a pump/mixer, first passing through a hose and a spray gun mixed with air.

The machine includes a feed hopper, a mixing chamber, a pump (important depending on the product to be sprayed), a hose to convey the spray mixture, and a spray gun that delivers the mixture.

The thickness of the spray-on coating will vary according to the thickness of the reinforced concrete slab and the steel coatings, depending on whether this involves:
• concrete slabs: Fireplaster 270® thickness will vary between 11 and 58 mm for an REI performance of between 30 and 240 minutes.
• beams on single or continuous concrete supports with width greater than or equal to 150 mm: Fireplaster 270® thickness will vary between 16 and 67 mm for an R performance of between 30 and 240 minutes.
• concrete walls: Fireplaster 270® thickness will vary between 11 and 58 mm for an REI performance of between 30 and 240 minutes.

Fire protection of concrete structures

Techniques for using Fireplaster®270 for the fire protection of concrete structures

The coating finish can be left rough with a surface grain or tinted with Sidairless®.
Sidairless® is an aqueous dispersion of vinyl copolymers with inert mineral fillers. It is a fine, ready-to-use coating. It is applied using pumps for spray-applied coatings.

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LEARN MORE ABOUT FIREPLASTER®270

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