Fibres

Twintec’s steel fibre reinforced concrete (SFRC) technology is the result of an extensive research and development programme.

Twintec predominantly uses undulated steel fibres in its unique SFRC processes. The highly resistant AFT fibre (advanced fibre technology) is characterised by its shape and allows a perfect reinforcement of concrete. Extensive testing has confirmed that the undulated shape is a key factor leading to optimal anchorage.

By adding high dosages of steel fibre, the concrete will behave like a composite material with an important gain in structural ductility and shrinkage control. With such rotation capacity, most designs are based on the yield line theory.

Characteristics of AFT and AFT+ fibres

Geometry: Diameter:	1mm
Length:	50 or 60mm
Amplitude:	0.65mm
Wavelength:	8mm

Physical characteristics:

Wire tensile strength:

AFT fibre:	1050 N/mm²
AFT fibre+:	1450 N/mm²
Wire carbon content:	<0.15%