Sustainability Enhancement through High-Dose Recycled Tire Steel Fibers in Concrete: Experimental Insights and Practical Applications

Abstract

This study investigates the viability of incorporating high doses of recycled tire steel fibers (RSFs) in concrete to enhance sustainability. To address this, RSFs are incorporated at volume fractions ranging from 1% to 1.75% in the concrete mixture. The study evaluates various performance parameters, including workability, elastic modulus, compressive strength (CS), split tensile strength (SS), flexural strength (FS), linear shrinkage (LS), and water absorption (WA). Results show a 10% improvement in SS and a 4% improvement in FS compared to plain concrete (0RFRC). Additionally, RSF-reinforced concrete (RFRC) exhibits a maximum 15% reduction in LS. Water absorption slightly increases, and adverse effects on CS and workability are noted with high RSF doses. RFRC can impact the cost of rigid pavements due to reduced depth requirements. Disposing of discarded tires and their by-products has emerged as a substantial environmental challenge, obstructing progress toward achieving net-zero targets. As a sustainable solution, this study explores the potential utilization of secondary materials derived from discarded tires within the construction industry. In conclusion, this research highlights the significant potential of utilizing RSFs to enhance the sustainability of infrastructure and contribute to more eco-friendly construction practices.

Finite-Element Performance Degradation Behavior of a Suspension Prestressed Concrete Arch Bridge with Grouting Defects

“…Prestressed concrete bridges emerged as a prominent bridge type in China due to their inherent benefits, including substantial load-bearing capacity, expansive span capabilities, swift construction timelines, cost-effectiveness, and sustainability [1][2][3][4]. The concept of prestressed concrete structures involves the preliminary application of axial compressive forces to a structure to preemptively diminish or counteract tensile stresses induced by external loads prior to the structural elements experiencing such external forces.…”