Tailoring Ultra-High-Performance Concrete Toughness with Carbon Fibers: Linking Microstructure and Fracture Energy
Year: 2025
Type: conference-paper
Abstract: This paper presents a multiscale experimental study on the effect of carbon microfiber reinforcement on the fracture behavior of ultra-high-performance fiber-reinforced concrete (UHPFRC).Various fiber lengths (0.1–6 mm) and contents (1.2–20 kg/m³) were tested, linking microstructural features obtained via X-ray computed tomography (CT), mercury intrusion porosimetry (MIP), and scanning electron microscopy (SEM) to mechanical performance. Results show that a dosage of 6 kg/m³ of 3–6 mm fibers offers a balance between workability and fracture resistance, with fracture energy increasing up to 195% compared to plain concrete. This research provides insights for optimizing fiber type and content in UHPFRC for structural applications.
Authors: J.D. Ríos, H. Cifuentes, G. Ruiz, D.C. González, M.A. Vicente, R.C. Yu, C. Leiva
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Awards: G1869931075, G3690828678
OpenAlex ID: W4414558775
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