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.