Reinforcing fibers for hardenable materials, especially concrete, comprises twisted instead of notched fibers to enhance grip with the matrix material

摘要

Each fiber is 3-200mm long and 0.1-10mm thick and comprises two or more plastic or metal wires twisted together to give a spiral appearance. An Independent claim is made for a process for manufacturing the reinforcing fibers in which two wires are twisted around a point and simultaneously drawn before cutting to length. Preferred features: The wires of a fiber may be twisted around a non-twisted wire and/or may be plaited, knotted or twisted several times together.