Microfiber-reinforced high-strength concrete

A method of manufacturing a microfiber-reinforced concrete comprising a cement matrix in which a microfiber additive of fiber elements is introduced and wherein the fiber elements have a shape memory alloy, with the method comprising at least the following steps:

• training a fiber shape of the fiber elements at a temperature above a transition temperature, with the fiber shape making an interlocking of the fiber elements possible;
• cooling the trained fiber elements;
• plastic deformation of the fiber elements from the trained fiber shape into an intermediate shape by which an interlocking of the fiber elements is prevented, wherein, to form the intermediate shape, the fiber elements are brought into a compacted form;
• the compacted form further comprises a curled form, a ball form, or a wound form, whereby an interlocking of the fiber elements is prevented;
• introducing the fiber elements into the cement matrix to form a fresh concrete;
• casting the fresh concrete;
• and
• heating the fresh concrete to the transition temperature so that the fiber elements return to the fiber shape while interlocking the fiber elements.