Research on the Mechanical Properties of Ceramic Aggregate Concrete Based on Fiber Reinforcement

This is the authors' abstract. We don't add key points for this paper.

To improve the toughness and enhance the strength of ceramsite concrete, this study employs three types of fibers to reinforce its performance. Four types of ceramsite concrete specimens were prepared and their static strength characteristics were tested. Based on the test results, the performance characterization parameters were calculated, and the failure modes were analyzed. In conjunction with Scanning Electron Microscope (SEM) experiments, the mechanical results were interpreted.The research results indicate that High toughness polypropylene(HTPP) fibers and steel fibers significantly enhance both the strength and toughness of ceramsite concrete, with steel fibers exhibiting a larger improvement. Carbon fibers can increase the strength of ceramsite concrete, but it do not enhance its toughness. When the fiber volume fraction is 0.6% for both HTPP fibers and steel fibers in ceramsite concrete, the strength increased by 25.8% and 54%, respectively, the strength-to-weight ratio improved by 22.5%-46.5%, and the toughness index W cu 0.85 increased by 11.8% and 45.7%, respectively. Besides,the concrete exhibited a ductile failure mode in both cases. Based on the SEM test results, the mechanisms through which the three types of fibers enhance ceramsite concrete are explained from the perspective of fiber surface characteristics. The research findings of this study can provide a theoretical foundation for the optimization design of such concrete and hold significant importance for the application of ceramsite concrete as a structural material.