Improvement of Mechanical Parameters of Self-Compacting Concrete Using Copper and Plastic Fibers

In this study, the effects of adding copper and plastic fibres and stone powder on flow parameters and hardening properties of self-compacting concrete have been investigated. The basic disadvantages of concrete include high specific gravity, low tensile strength compared to its compressive strength, low durability, and increasing tensile strength. By The use of fibres is expected to improve tensile strength, as well as reducing stiffness and, on the other hand, increasing the concrete plasticity. Today, self-compacting concrete solves one of the major problems in the implementation of concrete works in urban environments, which includes the noise pollution caused by the use of a vibrator to replacement concrete. Self-compacting concrete is a high-performance modern concrete that distinguishes its characteristics such as the lack need to internal or external density and the cross of dense reinforcement networks from conventional concrete. Another feature of self-compacting concrete is its high viscosity and stability as a result of the addition of fillers and the use of cement materials. But increasing the amount of cement materials and fillers in self-compacting concrete increases the brittleness of the concrete matrix, resulting in a decrease in deformability. Considering the successful experience of using fiber in concrete over the past years, in order to increase the deformability of ordinary, lightweight and high strength concrete, the use of fibres is an appropriate proposal to enhance of deformability of the self-compacting of concrete. Fiber concrete also has high energy absorption capacity and is not easily disassembled under impact loads.