| 摘要 |
The invention relates to a fiber, more particularly a steel fiber, for reinforcing castable hardening material, more particularly concrete, said fiber having length (L) and thickness (D) and formed from a sheet metal-shaped crude material having thickness (D), which has a central part having width (BM) running in a straight line and extending along the mean line of the fiber, both end areas (E) of which have a larger cross-sectional area (FE), at least in the partial lengths crosswise to the mean line of the fiber, than the cross-sectional area (FM) in the mean line of the fiber. The enlargement in the cross-sectional area (FE) of the end areas (E) is not configured abruptly towards the ends of the fibers and the length of the end areas (E) amounts to at least 5 % of the overall length (L) of the fiber. The invention is characterized in that, at least in a first partial length, the end areas (E) are configured as an angular section at an angle ( gamma ) from the rectilinear central part of the fiber with parallel longitudinal edges, the angular sections are located in a common plane with the side of the central part having width (BM) and the angular sections of a fiber point to opposite sides of the fiber in relation to the mean line of the rectilinear central part. The invention also relates to a method for the production of said fibers. |
