STEEL FIBER FOR REINFORCING CONCRETE OR CEMENT MORTAR, HAVING AN ANCHOR END AT A LESS THERE WITH TWO CURVED SECTIONS

摘要

This invention relates to steel fiber intended for reinforcing concrete or cement mortar. Steel fiber comprises a middle portion and an anchor end at one or both ends of the middle portion. The middle part has a major axis. The anchor end deviates from the main axis of the middle part in the deviating section. The anchor end has n curved sections, and the number n is equal to or greater than 2. When the steel fiber made according to this invention, which is in a stable position on a horizontal surface, is vertically projected onto a horizontal surface, vertical projections on this horizontal surface of all n curved sections of the anchor end are located on one side of the vertical projection on this horizontal surface of the main axis of the middle part. This invention also relates to a concrete structure reinforced with steel fibers made according to this invention and to the use of such steel fibers for load-bearing concrete structures.