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Geotechnical Characteristics of Fine-Grained Soils Stabilized with Fly Ash, a Review

Author

Listed:
  • Canan Turan

    (Department of Engineering, University of Exeter, Exeter EX4 4QF, UK)

  • Akbar A. Javadi

    (Department of Engineering, University of Exeter, Exeter EX4 4QF, UK)

  • Raffaele Vinai

    (Department of Engineering, University of Exeter, Exeter EX4 4QF, UK)

  • Ramiz Beig Zali

    (Department of Engineering, University of Exeter, Exeter EX4 4QF, UK)

Abstract

Fly ash is a waste material obtained from burning of coal in thermal power plants. Coal consumption is still very high and is expected to remain above 38% globally. Therefore, large volumes of fly ash are produced every year that need to be managed as waste. Improper disposal of fly ash can lead to surface water and ground water pollution and adversely affect human health and environment. The use of fly ash as an agent to stabilize soil has recently become popular in geotechnical engineering due to its many benefits such as being eco-friendly and cost-effective, and improving the geotechnical characteristics of the soil. This paper presents a review of the geotechnical properties of fly ash-stabilized fine-grained soils. Several features of fly ash, including classification, physical, geotechnical, chemical, and mineralogical properties, health concerns, disposal, availability, and cost are analyzed. The effects of fly ash in improving a wide range of mechanical properties of soils including unconfined compressive strength, shear strength, CBR value, consolidation and/or swelling characteristics, and permeability are reviewed in detail. It is shown that fly ash can be a substitute material for use in soil stabilization, leading to substantial economic and environmental benefits.

Suggested Citation

  • Canan Turan & Akbar A. Javadi & Raffaele Vinai & Ramiz Beig Zali, 2022. "Geotechnical Characteristics of Fine-Grained Soils Stabilized with Fly Ash, a Review," Sustainability, MDPI, vol. 14(24), pages 1-31, December.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:24:p:16710-:d:1002267
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    References listed on IDEAS

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    1. Asokan, P. & Saxena, Mohini & Asolekar, Shyam R., 2005. "Coal combustion residues—environmental implications and recycling potentials," Resources, Conservation & Recycling, Elsevier, vol. 43(3), pages 239-262.
    2. Katja Ohenoja & Janne Pesonen & Juho Yliniemi & Mirja Illikainen, 2020. "Utilization of Fly Ashes from Fluidized Bed Combustion: A Review," Sustainability, MDPI, vol. 12(7), pages 1-26, April.
    3. Kumar, Subodh & Patil, C.B., 2006. "Estimation of resource savings due to fly ash utilization in road construction," Resources, Conservation & Recycling, Elsevier, vol. 48(2), pages 125-140.
    4. Fusheng Zha & Songyu Liu & Yanjun Du & Kerui Cui, 2008. "Behavior of expansive soils stabilized with fly ash," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 47(3), pages 509-523, December.
    5. Nishantha Bandara & Hiroshan Hettiarachchi & Elin Jensen & Tarik H. Binoy, 2020. "Upcycling Potential of Industrial Waste in Soil Stabilization: Use of Kiln Dust and Fly Ash to Improve Weak Pavement Subgrades Encountered in Michigan, USA," Sustainability, MDPI, vol. 12(17), pages 1-13, September.
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    Cited by:

    1. Abdülhakim Zeybek & Murat Eyin, 2023. "Experimental Study on Liquefaction Characteristics of Saturated Sands Mixed with Fly Ash and Tire Crumb Rubber," Sustainability, MDPI, vol. 15(4), pages 1-24, February.
    2. Quadri Olakunle Babatunde & Yong-Hoon Byun, 2023. "Soil Stabilization Using Zein Biopolymer," Sustainability, MDPI, vol. 15(3), pages 1-12, January.

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