Experimental Research on Abrasion Resistance and Predictive Model of High-Density Rubberized Concrete with High Strength

Rubberized concrete has garnered widespread attention for its environmental friendliness. To improve the compressive strength of rubberized concrete, this study utilized ultrafine powder materials to densify the rubberized concrete. The mechanical and abrasion resistance properties were studied to investigate the effects of different rubber particle sizes and content on high-density rubberized concrete's compressive and abrasion strength. Additionally, the reinforcement mechanism was elucidated through microstructural analysis. The study also developed theoretical prediction models for abrasion strength based on compressive strength and rubber content using multiple linear regression and B-spline-based nonlinear regression models. Results indicate that incorporating rubber powder and rubber particles significantly improves the abrasion resistance of high-density rubberized concrete. In addition, a 10 % rubber content in high-density rubberized concrete was identified as the optimal formulation, considering the compressive strength degradation and abrasion strength improvement. Finally, the fitted models accurately predicted the relative abrasion strength of high-density rubber powder concrete and rubber particle concrete.