Field Experience and Structural Performance of Self-Consolidating Concrete in High-Rise and Bridge Construction-Effect of Fiber Type on Engineering Properties and Structural Performance of Fiber-Reinforced Self-Consolidating Concrete (PDF)

Effect of Fiber Type on Engineering Properties and Structural Performance of Fiber-Reinforced Self-Consolidating Concrete (PDF)

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Pdf Summary

This study, led by Kamal H. Khayat and Ahmed Abdelrazik, explores the impact of different fibers on the engineering properties and structural performance of Fiber-Reinforced Self-Consolidating Concrete (FR-SCC). A key focus is evaluating how fiber type influences the workability, mechanical properties, and shrinkage characteristics of this specialized concrete. The study examines different fiber types, including Steel (ST1, STST), Prospective Polypropylene (PLP), and Hybrid (STPL), assessing their effects on properties like compressive strength, tensile strength, flexural strength, toughness, and crack resistance.<br /><br />The research underscores that specific fiber mixtures substantially enhance the performance of concrete in several domains. For instance, adding 0.5% Steel (STST) with 4% Type-G expansive admixture to FR-SCC markedly boosts flexural strength by 32% and flexural toughness by 23 times over 56 days compared to traditional self-consolidating concrete (SCC). In terms of shrinkage, the inclusion of Steel and Polypropylene fibers with expansive additives significantly reduces drying shrinkage over a year and increases the time to cracking in restrained shrinkage tests.<br /><br />Moreover, structural tests demonstrate that optimizing FR-SCC with these fibers and expansive admixtures can improve concrete's resilience and load-bearing capabilities, making it suitable for robust infrastructure applications like bridge piers and deck construction. The study’s findings point towards the potential of FR-SCC to deliver enhanced structural performance and longevity, suggesting broader applications in transportation infrastructure where high durability and reduced maintenance are critical.

Keywords

Fiber-Reinforced Self-Consolidating Concrete

Kamal H. Khayat

Ahmed Abdelrazik

fiber types

workability

mechanical properties

shrinkage characteristics

structural performance

expansive admixtures

transportation infrastructure