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Reinforcing Effect of Polypropylene Waste Strips on Compacted Lateritic Soils

Author

Listed:
  • Régis Marçal

    (Department of Civil and Environmental Engineering, São Paulo State University (UNESP), Av. Engenheiro Luiz Edmundo Carrijo Coube 14-01, Bauru, SP 17033-360, Brazil)

  • Paulo César Lodi

    (Department of Civil and Environmental Engineering, São Paulo State University (UNESP), Av. Engenheiro Luiz Edmundo Carrijo Coube 14-01, Bauru, SP 17033-360, Brazil)

  • Natália de Souza Correia

    (Department of Civil Engineering, Federal University of Sao Carlos (UFSCar), Rodovia Washington Luiz, São Carlos, SP 17033-360, Brazil)

  • Heraldo Luiz Giacheti

    (Department of Civil and Environmental Engineering, São Paulo State University (UNESP), Av. Engenheiro Luiz Edmundo Carrijo Coube 14-01, Bauru, SP 17033-360, Brazil)

  • Roger Augusto Rodrigues

    (Department of Civil and Environmental Engineering, São Paulo State University (UNESP), Av. Engenheiro Luiz Edmundo Carrijo Coube 14-01, Bauru, SP 17033-360, Brazil)

  • John S. McCartney

    (Department of Structural Engineering, University of California at San Diego (UCSD), 9500 Gilman Dr., SME 442J, La Jolla, CA 92093-0085, USA)

Abstract

This study evaluated the strength properties of compacted lateritic soils reinforced with polypropylene (PP) waste strips cut from recycled plastic packing with the goal of promoting sustainability through using local materials for engineering work and reusing waste materials as low-cost reinforcements. Waste PP strips with widths of 15 mm and different lengths were uniformly mixed with clayey sand (SC) and clay (CL) soils with the goal of using these materials as low-cost fiber reinforcements. The impact of different PP strip contents (0.25% to 2.0%) and lengths (10, 15, 20, and 30 mm) on the unconfined compressive strength (UCS) of the soils revealed an optimum combination of PP strip content and length. Statistical analysis showed that PP strip content has a greater effect than the PP strip length on the UCS for both soils. Results led to the definition of an empirical equation to estimate the UCS of strip-reinforced soils. The results from direct shear tests indicate that the SC soil showed an increase in both apparent cohesion and friction angle after reinforcement, while the CL soil only showed an increase in friction angle after reinforcement. California bearing ratio (CBR) tests indicate that the SC soil experienced a 70% increase in CBR after reinforcement, while the CBR of the CL soil was not affected by strip inclusion.

Suggested Citation

  • Régis Marçal & Paulo César Lodi & Natália de Souza Correia & Heraldo Luiz Giacheti & Roger Augusto Rodrigues & John S. McCartney, 2020. "Reinforcing Effect of Polypropylene Waste Strips on Compacted Lateritic Soils," Sustainability, MDPI, vol. 12(22), pages 1-16, November.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:22:p:9572-:d:446585
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    Citations

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    Cited by:

    1. Sirichai Pattanawanidchai & Pongdhorn Sae-Oui & Thipjak Na-Lumpang & Surapich Loykulnant & Thirapong Kuankhamnuan, 2023. "Reduction in Soil Compaction by Utilization of Waste Tire Rubber," Sustainability, MDPI, vol. 15(16), pages 1-13, August.
    2. Bisma Khalid & Fahad Alshawmar, 2023. "Exploring the Feasibility of Using Recycled PET Strips with Palm Leaf Ash for Sustainable Soil Stabilization," Sustainability, MDPI, vol. 15(18), pages 1-16, September.
    3. Maitê Rocha Silveira & Sabrina Andrade Rocha & Natália de Souza Correia & Roger Augusto Rodrigues & Heraldo Luiz Giacheti & Paulo César Lodi, 2021. "Effect of Polypropylene Fibers on the Shear Strength–Dilation Behavior of Compacted Lateritic Soils," Sustainability, MDPI, vol. 13(22), pages 1-15, November.

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