Fiber-Reinforced Concrete—From Fresh Properties to Structural Design: New Tools, Guides, and Reports-An Overview of the Document ACI 544.8R-16 Report on Indirect Method to Obtain Stress-Strain Response of Fiber-Reinforced Concrete (FRC) (Recorded Presentation)

An Overview of the Document ACI 544.8R-16 Report on Indirect Method to Obtain Stress-Strain Response of Fiber-Reinforced Concrete (FRC) (Recorded Presentation)

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In this presentation, the speaker addresses the ACI 5448R report, which discusses indirect methods to derive the stress-strain response of fiber-reinforced concrete (FRC). This document serves as a bridge between experimental data and reliable material properties applicable in design scenarios, including corrosion repair and impact properties. It emphasizes the critical role of fibers in enhancing concrete properties, especially post-cracking, and explores challenges in standardizing approaches for their use in diverse applications like elevated slabs and shotcrete. Traditional tension tests are seen as crucial but complex, thus the adoption of flexural testing models. Current standards like ASTM 1609 are discussed. The presentation underscores the inverse analysis technique for deriving material properties and introduces available tools, including MATLAB and Excel spreadsheets, to process and back-calculate experimental data for design use, offering flexibility and efficiency in FRC application.

Keywords

fiber-reinforced concrete

stress-strain response

corrosion repair

inverse analysis

flexural testing

ACI 5448R