Experimental Study On Tensile Behavior Of Fiber Reinforced Self-compacting Concrete Specimens With Different Sizes

Concrete is one of the most important materials in civil engineering, and its application has covered all aspects of civil engineering. People have done a lot of research on how to improve the strength, toughness and working performance of concrete, then appeared the fiber reinforced self-compacting concrete. It not only has high fluidity and segregation resistance but fiber can improve the strength and toughness of selfcompacting concrete. At present, the research on the self-compacting concrete is mainly focused on the evaluation of the working performance and bending toughness. However, there are few studies on the performance of fiber self-compacting concrete.The influence of the shape of the specimen, the clamp method and the test equipment on the axis of the shaft is analyzed. The tensile test of the self-compacting concrete specimen by using the method of pasting steel plate. The influence of steel fiber, polymer fiber, and the hybrid on the performance of self-compacting concrete is studied. And the influence of specimen size on the tensile strength and the ductility of the specimen is analyzed.Research results show that the tensile strength of the self-compacting concrete can be effectively improved by the steel fiber and the polymer fiber in two cases. Steel fiber or hybrid fiber can change the failure mode of self-compacting concrete and can effectively improve the ductility of the specimen after the peak load.