Steel fiber is becoming our country's development various applications of increasingly popular engineering materials, play the role of construction are constantly improving, combined with concrete application is very important, in fact, in actual use, we have seen the fiber play a greater role in concrete. Steel fiber is a kind of fiber whose diameter ratio (the ratio of fiber length to diameter, when the fiber section is non-circular, the diameter of equivalent section circle area) is 40-80, which is produced by cutting thin steel wire, shearing cold rolled strip, milling ingot rapid condensation of molten steel. Low carbon steel fiber can be used for steel fiber reinforced concrete at room temperature, while stainless steel fiber must be used for fire-resistant steel fiber reinforced concrete. Adding proper amount of steel fiber into mortar concrete can improve its tensile strength, bending strength, toughness impact strength. This theory does fully address the action of fiber-reinforced composites in the theoretical concrete matrix, ignoring the steel fiber, which is ignored to bring coupling composite effect of matrix cracking; fiber spacing less than the theoretical maximum is ignored coupling fiber itself, crack resistance blindly emphasized fiber fiber spacing determine the role of asphalt fiber should be theoretical steel fiber. There are two types of impurities: one is the combination of interfering fiber matrix type fiber surface adhesion oil, mucus other harmful organic components; On the other hand, the occupied weighted fiber can be reinforced, even damaged matrix impurities, such as the integrity of multiple fiber sheets sticking together blocks, the fiber surface in concrete is seriously rusted, the iron clay fiber matrix has two forms of damage: first, the steel fiber is pulled out of the main body of concrete; second, the steel fiber is pulled out of the main body of concrete; Second, the steel fiber is broken, if the appearance of poor quality will affect the bond performance of concrete matrix steel fiber, fiber reinforced concrete. When damage occurs, in addition to the strength of the fiber matrix non breaking steel fiber, it can function, therefore the appearance of the reinforced fiber also takes into account the quality of the fiber. In the standard setting process, it is the main factor to consider the type, size shape of steel fiber, whether it contains fiber matrix adhesive interference impurities other indicators. Steel belt manufacturer