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NRRA: Pavement-Specific Structural Synthetic Fibers

Status:  Active
Project Start Date:  03/22/2021

Summary:

The application of synthetic fibers can reduce the fatigue cracking and faulting of thin concrete pavements and overlays. Currently available synthetic fibers used in concrete pavements are mainly polyolefin-based. Previous studies suggest that any fibers can plastically elongate and pullout from the concrete when crack widths are wide enough, thus becoming ineffective in transferring wheel load across adjacent sawn or cracked slabs. The purpose and effectiveness of reinforcement is holding concrete across differing crack widths. The goal of this study is to better understand existing polyolefin fiber performance against the abovementioned plastic elongation and pullout to eventually further increase the life of concrete pavements and overlays. This study will be conducted in two phases.

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