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Soil Improvement Using Blends of Coal Ash and Plantain Peel Ash as Road Pavement Layer Materials

Author

Listed:
  • Isaac Akinwumi

    (Department of Civil Engineering, Covenant University, Ota 112104, Nigeria)

  • Manuela Onyeiwu

    (Department of Civil Engineering, Covenant University, Ota 112104, Nigeria)

  • Promise Epelle

    (Department of Civil Engineering, Covenant University, Ota 112104, Nigeria)

  • Victor Ajayi

    (Department of Civil Engineering, Covenant University, Ota 112104, Nigeria)

Abstract

The management of waste and its environmental impact remains an issue. Thus, various strategies are being explored to mitigate this problem. For this research case, the ash of plantain peel and coal was harnessed to enhance soil for usage in designing road pavements. The form of the soil, as regards its plasticity and grain assortment, positions it as a sandy lean clay material. Geotechnical parameters of the natural soil were established before being treated with coal ash (CA) and plantain peel ash (PPA), and subjected to tests for the Atterberg limits, California bearing ratio (CBR) and compaction, as well as investigations pertaining to its crystallinity and morphology. These assessments showed that strength parameters of soil increased on adding CA and PPA. However, the inclusion of these admixtures should be conducted until optimal strength is achieved as seen in 9% CA + 6% PPA. The use of soil stabilised with CA and PPA is suitable for general fillings and embankments. These findings revealed that integrating CA and PPA together would have the potential of stabilising soil as pavement layer material while also eliminating the pollution that emerges from the improper disposal of coal and plantain peels from the environment.

Suggested Citation

  • Isaac Akinwumi & Manuela Onyeiwu & Promise Epelle & Victor Ajayi, 2023. "Soil Improvement Using Blends of Coal Ash and Plantain Peel Ash as Road Pavement Layer Materials," Resources, MDPI, vol. 12(3), pages 1-16, March.
    • Handle: RePEc:gam:jresou:v:12:y:2023:i:3:p:41-:d:1103672
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    References listed on IDEAS

    as
    1. Aliyu Usman & Nura Bala & Moshudi Bashiru, 2018. "Effect of Plantain Peel Ash (PPA) on the Mechanical Properties of Concrete," Noble International Journal of Scientific Research, Noble Academic Publsiher, vol. 2(3), pages 11-18, March.
    2. Amanda Qinisile Vilakazi & Sehliselo Ndlovu & Liberty Chipise & Alan Shemi, 2022. "The Recycling of Coal Fly Ash: A Review on Sustainable Developments and Economic Considerations," Sustainability, MDPI, vol. 14(4), pages 1-32, February.
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