Fiber-Reinforced Self-Consolidating Concrete - Development and Use-Fiber-Reinforced Self-Consolidating Concrete The Perspective of ACI TCs 544 and 237 (PDF)

Fiber-Reinforced Self-Consolidating Concrete The Perspective of ACI TCs 544 and 237 (PDF)

Pdf Summary

The document by Liberato Ferrara from Politecnico di Milano focuses on Fiber-Reinforced Self-Consolidating Concrete (FR-SCC) and summarizes insights from the joint American Concrete Institute committees 544 and 237. The sections address the introduction, notation, definitions, mix-design methods, fresh state performance, fiber dispersion, and structural implications.<br /><br />FR-SCC is highlighted for its blend of fiber reinforcement and self-consolidating properties, leveraging the distribution of fibers throughout the concrete mix. The manuscript discusses optimized mix-design methodologies that ensure proper packing density and rheology for the suspended solid skeleton phase (including fibers and aggregates) and the fluid cement paste phase. <br /><br />Significant attention is given to the behavior in the fresh state. Methods like the J-ring and L-box tests assess filling capacity and flow, which are critical due to how fiber orientation affects performance. The challenges of fiber dispersion and flow-induced orientation are monitored through various experimental techniques, including both destructive measures and advanced non-destructive methods such as X-rays, electrical resistivity, and magnetic inductance.<br /><br />Mechanical properties affected by fiber dispersion and flow-induced orientation are analyzed, focusing on the material's improved flexural performance due to fibers. The research underscores how anisotropy in fiber distribution may influence structural characteristics, necessitating methods for precise monitoring and design adaptations.<br /><br />In concluding remarks, Ferrara emphasizes synergy between self-compacting concretes and fiber reinforcement. He stresses the importance of well-planned casting for tailor-made fiber alignment, the potential for industrial-scale non-destructive monitoring, and enhanced design frameworks considering fiber orientation-induced anisotropy. This holistic approach is advancing applications of FR-SCC, notably exploring areas like 3D printable fiber-reinforced concrete, signifying new technological boundaries.

Keywords

Fiber-Reinforced Self-Consolidating Concrete

FR-SCC

fiber dispersion

mix-design methods

fresh state performance

fiber orientation

non-destructive monitoring

anisotropy

structural implications

3D printable concrete