Study on Improving Crack Resistance of Concrete by Waste Rubber Powder and Its Mechanism

In this study, we explore the use of an innovative mixture incorporating compound ecological fiber, waste rubber powder, fly ash, and single ore to enhance the cracking resistance of concrete. Through experimental analysis, we investigated the mechanical properties and underlying mechanisms associated with this composite material. The findings indicate that while the inclusion of mixed fiber and waste rubber powder does not significantly impact the compressive strength of concrete, these components notably enhance its toughness and early crack resistance. Specifically, the addition of these materials, along with single ore and fly ash, effectively reduces the brittleness coefficient of concrete, thereby markedly improving its resistance to cracking. This synergy between the materials demonstrates that the crack resistance of concrete can be significantly optimized through their combination.