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 (Recorded presentation)

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

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Video Summary

In this presentation, the speaker discusses the influence of fibers and expansive agents on the structural performance of fiber-reinforced self-consolidating concrete (SCC), particularly in repair applications such as bridge decks. Incorporating fibers, both steel and synthetic, into SCC enhances mechanical properties, cracking resistance, and durability. The use of expansive agents further reduces shrinkage and delays cracking. Various mixtures were evaluated, including combinations of steel fiber and polypropylene, revealing significant improvements, especially when using expansive agents. These combinations enhance tensile and flexural strengths, reduce drying shrinkage by up to 50%, and extend the time to cracking under restrained conditions. The benefits are crucial for infrastructure repairs, offering longer service life. A Missouri bridge deck project validated these findings, confirming that fiber-reinforced SCC can extend the life of infrastructure through improved mechanical performance and crack resistance.

Keywords

fiber-reinforced SCC

expansive agents

bridge deck repair

mechanical performance

crack resistance