Inevitability and importance of steel fibers
Concrete is made from the cement concrete materials, aggregates and water in accordance with a certain percentage of the configuration. Concrete cracking performance is poor, low tensile strength, tensile strength is typically 1 / 10-1 / 20 of compressive strength, so the poor toughness, larger brittle,, therefore it often occurs cracks in concrete structures, under general ambient conditions, when the crack width within a certain range, it does not affect the durability and applicability of concrete structures. But if cracks is enlarged, then it may appear reinforcement corrosion in the cracks, concrete carbonation, protective layer peeling. Thereby reducing the service life of the structure.
In order to suppress the expansion of cracks inside the concrete mussily, reducing the brittleness of concrete to improve its durability, can be mixed steel fibers into the concrete.
Steel fiber is a short fiber, to be distributed in the concrete, suppressing the expand and occurrence of the macro-cracks.
