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Sustainable Application of Wool-Banana Bio-Composite Waste Material in Geotechnical Engineering for Enhancement of Elastoplastic Strain and Resilience of Subgrade Expansive Clays

Author

Listed:
  • Wajeeha Qamar

    (Department of Transportation Engineering and Management, Faculty of Civil Engineering, University of Engineering and Technology, Lahore 54890, Pakistan)

  • Ammad Hassan Khan

    (Department of Transportation Engineering and Management, Faculty of Civil Engineering, University of Engineering and Technology, Lahore 54890, Pakistan)

  • Zia ur Rehman

    (Department of Transportation Engineering and Management, Faculty of Civil Engineering, University of Engineering and Technology, Lahore 54890, Pakistan)

  • Zubair Masoud

    (Independent Researcher, Lahore 54792, Pakistan)

Abstract

Agro-biogenic stabilization of expansive subgrade soils is trending to achieve cost-effective and sustainable geotechnical design to resist distress and settlement during the application of heavy traffic loads. This research presents optimized remediation of expansive clay by addition of proportionate quantities of waste renewable wool-banana (WB) fiber composites for the enhancement of elastoplastic strain (Ԑ EP ), peak strength (S p ), resilient modulus (M R ) and California bearing ratio (CBR) of expansive clays. Remolded samples of stabilized and nontreated clay prepared at maximum dry density (γ dmax ) and optimum moisture content (OMC) were subjected to a series of swell potential, unconfined compressive strength (UCS), resilient modulus (M R ) and CBR tests to evaluate swell potential, Ԑ EP , M R , and CBR parameters. The outcome of this study clearly demonstrates that the optimal WB fiber dosage (i.e., 0.6% wool and 1.2% banana fibers of dry weight of clay) lowers the free swell up to 58% and presents an enhancement of 3.5, 2.7, 3.0 and 4.5-times of Ԑ EPT , S p , M R and CBR, respectively. Enhancement in Ԑ EP is vital for the mitigation of excessive cracking in expansive clays for sustainable subgrades. The ratio of strain relating to the peak strength (Ԑ PS ) to the strain relating to the residual strength (Ԑ RS ), i.e., Ԑ PS /Ԑ RS = 2.99 which is highest among all fiber-clay blend depicting the highly ductile clay-fiber mixture. Cost-strength analysis reveals the optimized enhancement of Ԑ EPT , S p , M R and CBR in comparison with cost using clay plus 0.6% wool plus 1.2% banana fibers blend which depicts the potential application of this research to economize the stabilization of subgrade clay to achieve green and biogeotechnical engineering goals.

Suggested Citation

  • Wajeeha Qamar & Ammad Hassan Khan & Zia ur Rehman & Zubair Masoud, 2022. "Sustainable Application of Wool-Banana Bio-Composite Waste Material in Geotechnical Engineering for Enhancement of Elastoplastic Strain and Resilience of Subgrade Expansive Clays," Sustainability, MDPI, vol. 14(20), pages 1-14, October.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:20:p:13215-:d:942398
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    References listed on IDEAS

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    1. Andrés Seco & Jesús María del Castillo & Céline Perlot & Sara Marcelino-Sádaba & Eduardo Prieto & Sandra Espuelas, 2022. "Experimental Study of the Valorization of Sulfate Soils for Use as Construction Material," Sustainability, MDPI, vol. 14(11), pages 1-11, May.
    2. Jessica Giro-Paloma & Joan Formosa & Josep M Chimenos, 2020. "Stabilization Study of a Contaminated Soil with Metal(loid)s Adding Different Low-Grade MgO Degrees," Sustainability, MDPI, vol. 12(18), pages 1-16, September.
    3. Talal Taleb & Yesim S. Unsever, 2022. "Study on Strength and Swell Behavioral Change and Properties of the Clay–Fiber Mixtures," Sustainability, MDPI, vol. 14(11), pages 1-15, June.
    4. Nuno Cristelo & Jhonathan Rivera & Tiago Miranda & Ana Fernández-Jiménez, 2021. "Stabilisation of a Plastic Soil with Alkali Activated Cements Developed from Industrial Wastes," Sustainability, MDPI, vol. 13(8), pages 1-21, April.
    5. Andres Seco & Jesus María del Castillo & Sandra Espuelas & Sara Marcelino-Sadaba & Benat Garcia, 2021. "Stabilization of a Clay Soil Using Cementing Material from Spent Refractories and Ground-Granulated Blast Furnace Slag," Sustainability, MDPI, vol. 13(6), pages 1-16, March.
    6. Murat Türköz & Seyfettin Umut Umu & Ogan Öztürk, 2021. "Effect of Silica Fume as a Waste Material for Sustainable Environment on the Stabilization and Dynamic Behavior of Dispersive Soil," Sustainability, MDPI, vol. 13(8), pages 1-19, April.
    7. 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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