Factors Affecting Steel Fiber

According to various theories of fiber reinforcement mechanism, such as fiber spacing theory, composite material theory and micro-fracture theory, as well as the analysis of a large number of test data, it can be determined that the fiber reinforcement effect mainly depends on the matrix strength (fm), the aspect ratio of the fiber (The ratio of steel fiber length l to diameter d, i.e. I/d), the volume ratio of the fiber (the volume percentage of steel fiber in steel fiber concrete), the bonding strength (τ) between the fiber and the matrix, and the fiber in the matrix The influence of distribution and orientation (η) in . When steel fiber concrete is damaged, most of the fibers are pulled out rather than broken. Therefore, improving the bonding strength between the fibers and the matrix is one of the main controlling factors for improving the fiber reinforcement effect.