As we all know, steel fibers are extensively applied in concrete reinforcement. They not only shorten time but also decrease project budget. In contrast to conventional rebar, they are easy to use and are endowed with better performance in crack and shear resistance. Below are the main properties of steel fiber.
First, Adhesion between the steel fibers and the concrete matric bonds together mainly because of transfer of shear friction-based. There are three methods to increase bonding force:
Roughening the surface and deforming into irregular cross-section.
Plastic processing along the axial direction of the fiber.
Change the regular shape of both ends for strengthening anchorage.
Second, Hardness. Steel fiber, fabricated by any processing method, have been processed by high temperature and quickly cooled similar to the state of quenching. Hence, the surface hardness is usually high which ensure less broken during mixing. However, ultra-hardness will result in wreckage and lower the effect of reinforcement.
Third, Corrosion-resistance should be given much attention in damp environment, especially coastal areas. It is fully proved that under the same load capacity, steel fibers with bigger diameter shows better performance against corrosion. If necessary, stainless steel fibers are workable.