Micro Fibres, concrete reinforcement, Danish Fibres
Micro fibres op polypropylene
Micro Fibres

Wiking® Micro Fibres cover a leading range of monofilament polypropylene fibres, applicable to all types of concrete constructions, including tunnels. The fibres are very thin and therefore ideal for preventing cracks caused by plastic shrinkage in the actual drying/hardening phase of concrete.

Products include:

Wiking® Micro 15 μm

Ultra-fine construction fibres, particularly suitable as fire retardant material in tunnels (AbZ certified).

Wiking® Micro 32 μm

Construction fibres, especially suitable for water diversion tunnels (to enhance drainage of moisture) as well as railway tunnels.

Wiking® Micro 18 μm

Our most popular construction fibres, particularly suitable as fire retardant material in tunnels (AbZ certified).

Wiking® Micro 50 μm

Construction fibres, especially suitable for dry mortar, shotcrete and other concrete products.

Wiking® Micro 22 μm

Construction fibres with similar characteristics to Wiking® Micro 18 μm, also suitable for paper production.

Wiking® Micro 15 μm

Ultra-fine construction fibres, particularly suitable as fire retardant material in tunnels (AbZ certified).

Wiking® Micro 32 μm

Construction fibres, especially suitable for water diversion tunnels (to enhance drainage of moisture) as well as railway tunnels.

Wiking® Micro 18 μm

Our most popular construction fibres, particularly suitable as fire retardant material in tunnels (AbZ certified).

Wiking® Micro 50 μm

Construction fibres, especially suitable for dry mortar, shotcrete and other concrete products.

Wiking® Micro 22 μm

Construction fibres with similar characteristics to Wiking® Micro 18 μm, also suitable for paper production.

Advantages
Prevention of crack formation
Increased flexural strength
Reduction of explosive spalling
Increased ductility
Increased impact resistance
Prevention of crack formation
Reduction of explosive spalling
Increased impact resistance
Increased flexural strength
Increased ductility
Applications
  • Concrete elements (tunnels, buildings, bridges and roads)
  • Indoor floor units
  • Outdoor ground decks
  • Concrete products
  • Shotcrete (mortar and spraying concrete)
  • Concrete elements (tunnels, buildings, bridges and roads)
  • Indoor floor units
  • Outdoor ground decks
  • Concrete products
  • Shotcrete (mortar and spraying concrete)
Product description

Wiking® Micro Fibres are made of 100% virgin polypropylene, which has been extruded into very thin tows and subsequently cut to create extremely fine monofilament fibres, suitable for the prevention of cracks. The micro fibres can serve as an addition or alternative to steel mesh.

Crack control

Concrete is liable to develop cracks in the early stages of the drying phase, when the shrinking tension is at its highest. However, when Wiking® Micro Fibres are added to the concrete mix, the fibres will form a three-dimensional matrix in the mix, which prevents the formation of plastic shrinkage cracks. Especially the dispersing ability and unique fineness of the micro fibres ensure that the capacity for tensile deformation is maximised. Likewise, the matrix of fibres will reduce the formation of plastic settlement cracks.

Resistance to explosive fragmentation

Wiking® Micro Fibres are also suited as fire-retardant material in tunnel construction projects. In case of fire, the fibres will melt and create small capillary cavities in the concrete, which will delay an explosive fragmentation of the concrete. Especially, Wiking® Micro 18 μm and 15 μm have been AbZ-approved in all lengths for tunnel constructions in Germany.

Less than 1% air content

The surface of Wiking® Micro Fibres has received a special coating to increase the dispersing and adhesive abilities of the fibres. The special coating also ensures that the air content of fibre reinforced concrete stays below 1%.

Flexible production that meets your need

Our Wiking® Micro Fibres are produced in accordance with customer requirements. The fibres can be cut into specific lengths, depending on the application, or delivered in tow. We also offer special coating for enhanced bonding and the adding of colour to the fibres.

Specifications
  • Rawmaterial: Polypropylene C₃ H₆
  • Conductivity: Minimal
  • Chemical resistance: Satisfactory
  • Fibre length: 3, 6, 12 and 18 mm
  • Fibre diameter: 15 – 50 μm
  • Form: Round, smooth
  • 
Surface: Treated for dispersing and adherence
  • Specific gravity: 0.91g/cu cm
  • Colour: Natural
  • Absorption: Zero
  • Tensile strength: 152 – 557 MPa
  • E-module: 1135 – 4158 MPa
  • Fibre frequency: 100 – 1000 million/kg
  • Specific surface: 165 – 900 sq m/kg
  • Softening temperature: Approx. 160°C
  • Dosage: 0.6 – 2.0 kg/cu m

Find more information on each product in data sheets

Warranty references - Wiking® 50 μm

Wiking® 17 dtex 50 micron fulfils the EN-14.889-2, Fiberclass 1b, System 1 and is manufactured in an ISO 9001-2004 certified facility. However, Danish Fibres is not in control of how the products are used and processed and can consequently not be made liable for the end product.

Data sheets

Download data sheets in PDF to get more information about each type of our Wiking® Micro Fibres

Wiking® 15 μm
Wiking® 18 μm
Wiking® 32 μm
Wiking® 50 μm
Wiking® 15 μm
Wiking® 18 μm
Wiking® 32 μm
Wiking® 50 μm
Meet our sales team
CEO/President
Palle Kuntz
+45 24 65 96 15
pku@danishfibres.dk
Vice. Pres, Sales & Marketing
Bo Gyldenberg
+45 20 58 05 99
bgy@danishfibres.dk
Turning Torso, Construction Fibres supplied by Danish Fibres
Case stories
Turning Torso

Proud supplier of construction fibres for the award-winning skyscraper Turning Torso in Malmö, Sweden.

Our strengths, micro fibres, Danish Fibres
About us
Our strengths

Five reasons for choosing Danish Fibres as your fibres provider.

Macro Fibres og polypropylene
Construction fibres
Macro fibres

Specially developed to increase the ductility and tensile strength of concrete. A superior alternative to steel mesh.

Fibrillated Fibres of polypropylene
Construction fibres
Fibrillated fibres

Applicable to all types of concrete products – especially mortar, shotcrete and concrete elements.