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<p>The growing environmental concerns regarding plastic waste have motivated the search for sustainable solutions, especially in the construction industry. This study investigates into the use of waste plastic fibers derived from recycled plastic waste as a reinforcing element in Roller Compacted Concrete (RCC) to improve its mechanical properties. Waste plastic fibers were mixed into RCC at different amounts to test their impact on compressive strength, tensile strength, flexural strength, and crack resistance. The results indicate that the proper fiber content notably improves these characteristics while maintaining the material’s integrity. Water absorption increases with the percentage of PVC waste plastic fibers; the Rccp-C-300 PVC mix exhibits the largest increase (20.41%). The Rccp-C-200 PVC mix shows enhanced strength at 28 days (8.29%) and continues with its enhancement at 90 days, whereas a larger fiber content initially decreases compressive strength at 7 days. The Rccp-C-200 mix shows the greatest improvement in tensile splitting strength (48.10% at 28 days), whereas the Rccp-C-300 mix shows a decrease in strength. Tensile splitting strength increases with fiber content. Flexural strength also increases up to the Rccp-C-200 mix (13.87 MPa), but the Rccp-C-300 mix’s high fiber content causes strength decrease (11.84 MPa). The addition of fibers has an impact on the microstructure and binding between cement paste and aggregates, highlighting the importance for suitable fiber mixing and treatment. This study indicates that waste plastic fibers can be used as an efficient reinforcement to improve the mechanical performance of RCC.</p>

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Evaluating the effects of recycled waste plastic fibers on the mechanical performance of roller compacted concrete

  • 期刊论文

  • 发表日期：

    2025年8月30日

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  • Hersh F. Mahmood

摘要

The growing environmental concerns regarding plastic waste have motivated the search for sustainable solutions, especially in the construction industry. This study investigates into the use of waste plastic fibers derived from recycled plastic waste as a reinforcing element in Roller Compacted Concrete (RCC) to improve its mechanical properties. Waste plastic fibers were mixed into RCC at different amounts to test their impact on compressive strength, tensile strength, flexural strength, and crack resistance. The results indicate that the proper fiber content notably improves these characteristics while maintaining the material’s integrity. Water absorption increases with the percentage of PVC waste plastic fibers; the Rccp-C-300 PVC mix exhibits the largest increase (20.41%). The Rccp-C-200 PVC mix shows enhanced strength at 28 days (8.29%) and continues with its enhancement at 90 days, whereas a larger fiber content initially decreases compressive strength at 7 days. The Rccp-C-200 mix shows the greatest improvement in tensile splitting strength (48.10% at 28 days), whereas the Rccp-C-300 mix shows a decrease in strength. Tensile splitting strength increases with fiber content. Flexural strength also increases up to the Rccp-C-200 mix (13.87 MPa), but the Rccp-C-300 mix’s high fiber content causes strength decrease (11.84 MPa). The addition of fibers has an impact on the microstructure and binding between cement paste and aggregates, highlighting the importance for suitable fiber mixing and treatment. This study indicates that waste plastic fibers can be used as an efficient reinforcement to improve the mechanical performance of RCC.