Fiber-reinforced Cement-based Materials, Steel Fiber Drawing Characteristics

Steel fiber is mixed into the cement matrix ,which influence the mechanic properties of the concrete, improve its intensity and tenacity. The interfacial layer between steel fiber and cement matrix is one of the most important factors. In the course of research, the interfacial bonding influence of steel fibers and cement matrix are discussed by both theory analytical and experimental methods. The work of this dissertation is shown as follows:1. The process of the fiber pull-out from matrix is analyzed and model are based on some assumption, the analytical expressions of the pull-out curves are obtained.2.The numerical methods are applied to analyse pullout process of steel fiber and the matrix which make the precision result.3.A series of experiments were designed to research and analyze the mechanic properties of the cement composite.4.the pull-out curves and data of the experiments are fitted ,so some expressions are given.